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8sa1-gcc/gcc/java/parse.y
Alexandre Petit-Bianco 8576f0942e [multiple changes] 
Mon Jun 14 13:13:39 1999  Alexandre Petit-Bianco  <apbianco@cygnus.com>
	* parse.y (qualify_ambiguous_name): Reorganized the post
 	evaluation of non WFL leading expression nodes.
Fri Jun 11 21:37:18 1999  Alexandre Petit-Bianco  <apbianco@cygnus.com>
	* parse.y (qualify_ambiguous_name): Handle ARRAY_REF after
 	CONVERT_EXPR.
Thu Jun 10 22:26:17 1999  Alexandre Petit-Bianco  <apbianco@cygnus.com>
	* parse.y (qualify_ambiguous_name): Handle qualified expression
 	beginning with a STRING_CST.
Thu Jun 10 20:27:25 1999  Alexandre Petit-Bianco  <apbianco@cygnus.com>
	* parse.y (register_fields): Set DECL_INITIAL on both
 	pre-initialized static and public fields.
	(resolve_field_access): Static field access expressions to always
 	use pointer types.
	(qualify_ambiguous_name): Work out buried CALL_EXPR for proper
 	qualification. CONVERT_EXPR to be resolved as an expression name.
	(java_complete_lhs): Identify and access qualified final
 	initialized field in switch statement case expression.
	(fold_constant_for_init): Pre-initialized field decl constant to
 	be folded.

From-SVN: r27523
1999-06-14 10:15:35 -07:00

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/* Source code parsing and tree node generation for the GNU compiler
for the Java(TM) language.
Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
Contributed by Alexandre Petit-Bianco (apbianco@cygnus.com)
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
The Free Software Foundation is independent of Sun Microsystems, Inc. */
/* This file parses java source code and issues a tree node image
suitable for code generation (byte code and targeted CPU assembly
language).
The grammar conforms to the Java grammar described in "The Java(TM)
Language Specification. J. Gosling, B. Joy, G. Steele. Addison Wesley
1996, ISBN 0-201-63451-1"
The following modifications were brought to the original grammar:
method_body: added the rule '| block SC_TK'
static_initializer: added the rule 'static block SC_TK'.
Note: All the extra rules described above should go away when the
empty_statement rule will work.
statement_nsi: 'nsi' should be read no_short_if.
Some rules have been modified to support JDK1.1 inner classes
definitions and other extensions. */
%{
#include "config.h"
#include "system.h"
#include <dirent.h>
#include "tree.h"
#include "rtl.h"
#include "obstack.h"
#include "toplev.h"
#include "flags.h"
#include "java-tree.h"
#include "jcf.h"
#include "lex.h"
#include "parse.h"
#include "zipfile.h"
#include "convert.h"
#include "buffer.h"
#include "xref.h"
#include "except.h"
#ifndef DIR_SEPARATOR
#define DIR_SEPARATOR '/'
#endif
/* Local function prototypes */
static char *java_accstring_lookup PROTO ((int));
static void classitf_redefinition_error PROTO ((char *,tree, tree, tree));
static void variable_redefinition_error PROTO ((tree, tree, tree, int));
static void check_modifiers PROTO ((char *, int, int));
static tree create_class PROTO ((int, tree, tree, tree));
static tree create_interface PROTO ((int, tree, tree));
static tree find_field PROTO ((tree, tree));
static tree lookup_field_wrapper PROTO ((tree, tree));
static int duplicate_declaration_error_p PROTO ((tree, tree, tree));
static void register_fields PROTO ((int, tree, tree));
static tree parser_qualified_classname PROTO ((tree));
static int parser_check_super PROTO ((tree, tree, tree));
static int parser_check_super_interface PROTO ((tree, tree, tree));
static void check_modifiers_consistency PROTO ((int));
static tree lookup_cl PROTO ((tree));
static tree lookup_java_method2 PROTO ((tree, tree, int));
static tree method_header PROTO ((int, tree, tree, tree));
static void fix_method_argument_names PROTO ((tree ,tree));
static tree method_declarator PROTO ((tree, tree));
static void parse_warning_context PVPROTO ((tree cl, const char *msg, ...))
ATTRIBUTE_PRINTF_2;
static void issue_warning_error_from_context PROTO ((tree, const char *msg, va_list));
static tree parse_jdk1_1_error PROTO ((char *));
static void complete_class_report_errors PROTO ((jdep *));
static int process_imports PROTO ((void));
static void read_import_dir PROTO ((tree));
static int find_in_imports_on_demand PROTO ((tree));
static int find_in_imports PROTO ((tree));
static int check_pkg_class_access PROTO ((tree, tree));
static tree resolve_package PROTO ((tree, tree *));
static tree lookup_package_type PROTO ((char *, int));
static tree resolve_class PROTO ((tree, tree, tree));
static void declare_local_variables PROTO ((int, tree, tree));
static void source_start_java_method PROTO ((tree));
static void source_end_java_method PROTO ((void));
static void expand_start_java_method PROTO ((tree));
static tree find_name_in_single_imports PROTO ((tree));
static void check_abstract_method_header PROTO ((tree));
static tree lookup_java_interface_method2 PROTO ((tree, tree));
static tree resolve_expression_name PROTO ((tree, tree *));
static tree maybe_create_class_interface_decl PROTO ((tree, tree, tree));
static int check_class_interface_creation PROTO ((int, int, tree,
tree, tree, tree));
static tree patch_method_invocation PROTO ((tree, tree, tree,
int *, tree *));
static int breakdown_qualified PROTO ((tree *, tree *, tree));
static tree resolve_and_layout PROTO ((tree, tree));
static tree resolve_no_layout PROTO ((tree, tree));
static int invocation_mode PROTO ((tree, int));
static tree find_applicable_accessible_methods_list PROTO ((int, tree,
tree, tree));
static void search_applicable_methods_list PROTO ((int, tree, tree, tree,
tree *, tree *));
static tree find_most_specific_methods_list PROTO ((tree));
static int argument_types_convertible PROTO ((tree, tree));
static tree patch_invoke PROTO ((tree, tree, tree));
static tree lookup_method_invoke PROTO ((int, tree, tree, tree, tree));
static tree register_incomplete_type PROTO ((int, tree, tree, tree));
static tree obtain_incomplete_type PROTO ((tree));
static tree java_complete_lhs PROTO ((tree));
static tree java_complete_tree PROTO ((tree));
static void java_complete_expand_method PROTO ((tree));
static int unresolved_type_p PROTO ((tree, tree *));
static void create_jdep_list PROTO ((struct parser_ctxt *));
static tree build_expr_block PROTO ((tree, tree));
static tree enter_block PROTO ((void));
static tree enter_a_block PROTO ((tree));
static tree exit_block PROTO ((void));
static tree lookup_name_in_blocks PROTO ((tree));
static void maybe_absorb_scoping_blocks PROTO ((void));
static tree build_method_invocation PROTO ((tree, tree));
static tree build_new_invocation PROTO ((tree, tree));
static tree build_assignment PROTO ((int, int, tree, tree));
static tree build_binop PROTO ((enum tree_code, int, tree, tree));
static int check_final_assignment PROTO ((tree ,tree));
static tree patch_assignment PROTO ((tree, tree, tree ));
static tree patch_binop PROTO ((tree, tree, tree));
static tree build_unaryop PROTO ((int, int, tree));
static tree build_incdec PROTO ((int, int, tree, int));
static tree patch_unaryop PROTO ((tree, tree));
static tree build_cast PROTO ((int, tree, tree));
static tree build_null_of_type PROTO ((tree));
static tree patch_cast PROTO ((tree, tree));
static int valid_ref_assignconv_cast_p PROTO ((tree, tree, int));
static int valid_builtin_assignconv_identity_widening_p PROTO ((tree, tree));
static int valid_cast_to_p PROTO ((tree, tree));
static int valid_method_invocation_conversion_p PROTO ((tree, tree));
static tree try_builtin_assignconv PROTO ((tree, tree, tree));
static tree try_reference_assignconv PROTO ((tree, tree));
static tree build_unresolved_array_type PROTO ((tree));
static tree build_array_from_name PROTO ((tree, tree, tree, tree *));
static tree build_array_ref PROTO ((int, tree, tree));
static tree patch_array_ref PROTO ((tree));
static tree make_qualified_name PROTO ((tree, tree, int));
static tree merge_qualified_name PROTO ((tree, tree));
static tree make_qualified_primary PROTO ((tree, tree, int));
static int resolve_qualified_expression_name PROTO ((tree, tree *,
tree *, tree *));
static void qualify_ambiguous_name PROTO ((tree));
static void maybe_generate_clinit PROTO ((void));
static tree resolve_field_access PROTO ((tree, tree *, tree *));
static tree build_newarray_node PROTO ((tree, tree, int));
static tree patch_newarray PROTO ((tree));
static tree resolve_type_during_patch PROTO ((tree));
static tree build_this PROTO ((int));
static tree build_return PROTO ((int, tree));
static tree patch_return PROTO ((tree));
static tree maybe_access_field PROTO ((tree, tree, tree));
static int complete_function_arguments PROTO ((tree));
static int check_for_static_method_reference PROTO ((tree, tree, tree, tree, tree));
static int not_accessible_p PROTO ((tree, tree, int));
static void check_deprecation PROTO ((tree, tree));
static int class_in_current_package PROTO ((tree));
static tree build_if_else_statement PROTO ((int, tree, tree, tree));
static tree patch_if_else_statement PROTO ((tree));
static tree add_stmt_to_compound PROTO ((tree, tree, tree));
static tree add_stmt_to_block PROTO ((tree, tree, tree));
static tree patch_exit_expr PROTO ((tree));
static tree build_labeled_block PROTO ((int, tree));
static tree finish_labeled_statement PROTO ((tree, tree));
static tree build_bc_statement PROTO ((int, int, tree));
static tree patch_bc_statement PROTO ((tree));
static tree patch_loop_statement PROTO ((tree));
static tree build_new_loop PROTO ((tree));
static tree build_loop_body PROTO ((int, tree, int));
static tree finish_loop_body PROTO ((int, tree, tree, int));
static tree build_debugable_stmt PROTO ((int, tree));
static tree finish_for_loop PROTO ((int, tree, tree, tree));
static tree patch_switch_statement PROTO ((tree));
static tree string_constant_concatenation PROTO ((tree, tree));
static tree build_string_concatenation PROTO ((tree, tree));
static tree patch_string_cst PROTO ((tree));
static tree patch_string PROTO ((tree));
static tree build_try_statement PROTO ((int, tree, tree));
static tree build_try_finally_statement PROTO ((int, tree, tree));
static tree patch_try_statement PROTO ((tree));
static tree patch_synchronized_statement PROTO ((tree, tree));
static tree patch_throw_statement PROTO ((tree, tree));
static void check_thrown_exceptions PROTO ((int, tree));
static int check_thrown_exceptions_do PROTO ((tree));
static void purge_unchecked_exceptions PROTO ((tree));
static void check_throws_clauses PROTO ((tree, tree, tree));
static void finish_method_declaration PROTO ((tree));
static tree build_super_invocation PROTO (());
static int verify_constructor_circularity PROTO ((tree, tree));
static char *constructor_circularity_msg PROTO ((tree, tree));
static tree build_this_super_qualified_invocation PROTO ((int, tree, tree,
int, int));
static char *get_printable_method_name PROTO ((tree));
static tree patch_conditional_expr PROTO ((tree, tree, tree));
static void maybe_generate_finit PROTO (());
static void fix_constructors PROTO ((tree));
static int verify_constructor_super PROTO (());
static tree create_artificial_method PROTO ((tree, int, tree, tree, tree));
static void start_artificial_method_body PROTO ((tree));
static void end_artificial_method_body PROTO ((tree));
static int check_method_redefinition PROTO ((tree, tree));
static int reset_method_name PROTO ((tree));
static void java_check_regular_methods PROTO ((tree));
static void java_check_abstract_methods PROTO ((tree));
static tree maybe_build_primttype_type_ref PROTO ((tree, tree));
static void unreachable_stmt_error PROTO ((tree));
static tree find_expr_with_wfl PROTO ((tree));
static void missing_return_error PROTO ((tree));
static tree build_new_array_init PROTO ((int, tree));
static tree patch_new_array_init PROTO ((tree, tree));
static tree maybe_build_array_element_wfl PROTO ((tree));
static int array_constructor_check_entry PROTO ((tree, tree));
static char *purify_type_name PROTO ((char *));
static tree fold_constant_for_init PROTO ((tree, tree));
static tree strip_out_static_field_access_decl PROTO ((tree));
static jdeplist *reverse_jdep_list PROTO ((struct parser_ctxt *));
static void static_ref_err PROTO ((tree, tree, tree));
/* Number of error found so far. */
int java_error_count;
/* Number of warning found so far. */
int java_warning_count;
/* Tell when not to fold, when doing xrefs */
int do_not_fold;
/* The current parser context */
struct parser_ctxt *ctxp;
/* List of things that were analyzed for which code will be generated */
static struct parser_ctxt *ctxp_for_generation = NULL;
/* binop_lookup maps token to tree_code. It is used where binary
operations are involved and required by the parser. RDIV_EXPR
covers both integral/floating point division. The code is changed
once the type of both operator is worked out. */
static enum tree_code binop_lookup[19] =
{
PLUS_EXPR, MINUS_EXPR, MULT_EXPR, RDIV_EXPR, TRUNC_MOD_EXPR,
LSHIFT_EXPR, RSHIFT_EXPR, URSHIFT_EXPR,
BIT_AND_EXPR, BIT_XOR_EXPR, BIT_IOR_EXPR,
TRUTH_ANDIF_EXPR, TRUTH_ORIF_EXPR,
EQ_EXPR, NE_EXPR, GT_EXPR, GE_EXPR, LT_EXPR, LE_EXPR,
};
#define BINOP_LOOKUP(VALUE) \
binop_lookup [((VALUE) - PLUS_TK)% \
(sizeof (binop_lookup) / sizeof (binop_lookup[0]))]
/* Fake WFL used to report error message. It is initialized once if
needed and reused with it's location information is overriden. */
tree wfl_operator = NULL_TREE;
/* The "$L" identifier we use to create labels. */
static tree label_id = NULL_TREE;
/* The "StringBuffer" identifier used for the String `+' operator. */
static tree wfl_string_buffer = NULL_TREE;
/* The "append" identifier used for String `+' operator. */
static tree wfl_append = NULL_TREE;
/* The "toString" identifier used for String `+' operator. */
static tree wfl_to_string = NULL_TREE;
/* The "java.lang" import qualified name. */
static tree java_lang_id = NULL_TREE;
/* The "java.lang.Cloneable" qualified name. */
static tree java_lang_cloneable = NULL_TREE;
/* Context and flag for static blocks */
static tree current_static_block = NULL_TREE;
%}
%union {
tree node;
int sub_token;
struct {
int token;
int location;
} operator;
int value;
}
%{
#include "lex.c"
%}
%pure_parser
/* Things defined here have to match the order of what's in the
binop_lookup table. */
%token PLUS_TK MINUS_TK MULT_TK DIV_TK REM_TK
%token LS_TK SRS_TK ZRS_TK
%token AND_TK XOR_TK OR_TK
%token BOOL_AND_TK BOOL_OR_TK
%token EQ_TK NEQ_TK GT_TK GTE_TK LT_TK LTE_TK
/* This maps to the same binop_lookup entry than the token above */
%token PLUS_ASSIGN_TK MINUS_ASSIGN_TK MULT_ASSIGN_TK DIV_ASSIGN_TK
%token REM_ASSIGN_TK
%token LS_ASSIGN_TK SRS_ASSIGN_TK ZRS_ASSIGN_TK
%token AND_ASSIGN_TK XOR_ASSIGN_TK OR_ASSIGN_TK
/* Modifier TOKEN have to be kept in this order. Don't scramble it */
%token PUBLIC_TK PRIVATE_TK PROTECTED_TK
%token STATIC_TK FINAL_TK SYNCHRONIZED_TK
%token VOLATILE_TK TRANSIENT_TK NATIVE_TK
%token PAD_TK ABSTRACT_TK MODIFIER_TK
/* Keep those two in order, too */
%token DECR_TK INCR_TK
/* From now one, things can be in any order */
%token DEFAULT_TK IF_TK THROW_TK
%token BOOLEAN_TK DO_TK IMPLEMENTS_TK
%token THROWS_TK BREAK_TK IMPORT_TK
%token ELSE_TK INSTANCEOF_TK RETURN_TK
%token VOID_TK CATCH_TK INTERFACE_TK
%token CASE_TK EXTENDS_TK FINALLY_TK
%token SUPER_TK WHILE_TK CLASS_TK
%token SWITCH_TK CONST_TK TRY_TK
%token FOR_TK NEW_TK CONTINUE_TK
%token GOTO_TK PACKAGE_TK THIS_TK
%token BYTE_TK SHORT_TK INT_TK LONG_TK
%token CHAR_TK INTEGRAL_TK
%token FLOAT_TK DOUBLE_TK FP_TK
%token ID_TK
%token REL_QM_TK REL_CL_TK NOT_TK NEG_TK
%token ASSIGN_ANY_TK ASSIGN_TK
%token OP_TK CP_TK OCB_TK CCB_TK OSB_TK CSB_TK SC_TK C_TK DOT_TK
%token STRING_LIT_TK CHAR_LIT_TK INT_LIT_TK FP_LIT_TK
%token TRUE_TK FALSE_TK BOOL_LIT_TK NULL_TK
%type <value> modifiers MODIFIER_TK
%type <node> super ID_TK identifier
%type <node> name simple_name qualified_name
%type <node> class_declaration type_declaration compilation_unit
field_declaration method_declaration extends_interfaces
interfaces interface_type_list
interface_declaration class_member_declaration
import_declarations package_declaration
type_declarations interface_body
interface_member_declaration constant_declaration
interface_member_declarations interface_type
abstract_method_declaration interface_type_list
%type <node> class_body_declaration class_member_declaration
static_initializer constructor_declaration block
%type <node> class_body_declarations constructor_header
%type <node> class_or_interface_type class_type class_type_list
constructor_declarator explicit_constructor_invocation
%type <node> dim_expr dim_exprs this_or_super throws
%type <node> variable_declarator_id variable_declarator
variable_declarators variable_initializer
variable_initializers constructor_body
array_initializer
%type <node> class_body block_end constructor_block_end
%type <node> statement statement_without_trailing_substatement
labeled_statement if_then_statement label_decl
if_then_else_statement while_statement for_statement
statement_nsi labeled_statement_nsi do_statement
if_then_else_statement_nsi while_statement_nsi
for_statement_nsi statement_expression_list for_init
for_update statement_expression expression_statement
primary_no_new_array expression primary
array_creation_expression array_type
class_instance_creation_expression field_access
method_invocation array_access something_dot_new
argument_list postfix_expression while_expression
post_increment_expression post_decrement_expression
unary_expression_not_plus_minus unary_expression
pre_increment_expression pre_decrement_expression
unary_expression_not_plus_minus cast_expression
multiplicative_expression additive_expression
shift_expression relational_expression
equality_expression and_expression
exclusive_or_expression inclusive_or_expression
conditional_and_expression conditional_or_expression
conditional_expression assignment_expression
left_hand_side assignment for_header for_begin
constant_expression do_statement_begin empty_statement
switch_statement synchronized_statement throw_statement
try_statement switch_expression switch_block
catches catch_clause catch_clause_parameter finally
%type <node> return_statement break_statement continue_statement
%type <operator> ASSIGN_TK MULT_ASSIGN_TK DIV_ASSIGN_TK
%type <operator> REM_ASSIGN_TK PLUS_ASSIGN_TK MINUS_ASSIGN_TK
%type <operator> LS_ASSIGN_TK SRS_ASSIGN_TK ZRS_ASSIGN_TK
%type <operator> AND_ASSIGN_TK XOR_ASSIGN_TK OR_ASSIGN_TK
%type <operator> ASSIGN_ANY_TK assignment_operator
%token <operator> EQ_TK GTE_TK ZRS_TK SRS_TK GT_TK LTE_TK LS_TK
%token <operator> BOOL_AND_TK AND_TK BOOL_OR_TK OR_TK INCR_TK PLUS_TK
%token <operator> DECR_TK MINUS_TK MULT_TK DIV_TK XOR_TK REM_TK NEQ_TK
%token <operator> NEG_TK REL_QM_TK REL_CL_TK NOT_TK LT_TK OCB_TK CCB_TK
%token <operator> OP_TK OSB_TK DOT_TK THROW_TK INSTANCEOF_TK
%type <operator> THIS_TK SUPER_TK RETURN_TK BREAK_TK CONTINUE_TK
%type <operator> CASE_TK DEFAULT_TK TRY_TK CATCH_TK SYNCHRONIZED_TK
%type <node> method_body
%type <node> literal INT_LIT_TK FP_LIT_TK BOOL_LIT_TK CHAR_LIT_TK
STRING_LIT_TK NULL_TK VOID_TK
%type <node> IF_TK WHILE_TK FOR_TK
%type <node> formal_parameter_list formal_parameter
method_declarator method_header
%type <node> primitive_type reference_type type
BOOLEAN_TK INTEGRAL_TK FP_TK
%%
/* 19.2 Production from 2.3: The Syntactic Grammar */
goal:
compilation_unit
{}
;
/* 19.3 Productions from 3: Lexical structure */
literal:
INT_LIT_TK
| FP_LIT_TK
| BOOL_LIT_TK
| CHAR_LIT_TK
| STRING_LIT_TK
| NULL_TK
;
/* 19.4 Productions from 4: Types, Values and Variables */
type:
primitive_type
| reference_type
;
primitive_type:
INTEGRAL_TK
| FP_TK
| BOOLEAN_TK
;
reference_type:
class_or_interface_type
| array_type
;
class_or_interface_type:
name
;
class_type:
class_or_interface_type /* Default rule */
;
interface_type:
class_or_interface_type
;
array_type:
primitive_type OSB_TK CSB_TK
{
$$ = build_java_array_type ($1, -1);
CLASS_LOADED_P ($$) = 1;
}
| name OSB_TK CSB_TK
{ $$ = build_unresolved_array_type ($1); }
| array_type OSB_TK CSB_TK
{ $$ = build_unresolved_array_type ($1); }
| primitive_type OSB_TK error
{RULE ("']' expected"); RECOVER;}
| array_type OSB_TK error
{RULE ("']' expected"); RECOVER;}
;
/* 19.5 Productions from 6: Names */
name:
simple_name /* Default rule */
| qualified_name /* Default rule */
;
simple_name:
identifier /* Default rule */
;
qualified_name:
name DOT_TK identifier
{ $$ = make_qualified_name ($1, $3, $2.location); }
;
identifier:
ID_TK
;
/* 19.6: Production from 7: Packages */
compilation_unit:
{$$ = NULL;}
| package_declaration
| import_declarations
| type_declarations
| package_declaration import_declarations
| package_declaration type_declarations
| import_declarations type_declarations
| package_declaration import_declarations type_declarations
;
import_declarations:
import_declaration
{
$$ = NULL;
}
| import_declarations import_declaration
{
$$ = NULL;
}
;
type_declarations:
type_declaration
| type_declarations type_declaration
;
package_declaration:
PACKAGE_TK name SC_TK
{ ctxp->package = EXPR_WFL_NODE ($2); }
| PACKAGE_TK error
{yyerror ("Missing name"); RECOVER;}
| PACKAGE_TK name error
{yyerror ("';' expected"); RECOVER;}
;
import_declaration:
single_type_import_declaration
| type_import_on_demand_declaration
;
single_type_import_declaration:
IMPORT_TK name SC_TK
{
tree name = EXPR_WFL_NODE ($2), node, last_name;
int i = IDENTIFIER_LENGTH (name)-1;
char *last = &IDENTIFIER_POINTER (name)[i];
while (last != IDENTIFIER_POINTER (name))
{
if (last [0] == '.')
break;
last--;
}
last_name = get_identifier (++last);
if (IS_A_SINGLE_IMPORT_CLASSFILE_NAME_P (last_name))
{
tree err = find_name_in_single_imports (last_name);
if (err && err != name)
parse_error_context
($2, "Ambiguous class: `%s' and `%s'",
IDENTIFIER_POINTER (name),
IDENTIFIER_POINTER (err));
else
REGISTER_IMPORT ($2, last_name)
}
else
REGISTER_IMPORT ($2, last_name);
}
| IMPORT_TK error
{yyerror ("Missing name"); RECOVER;}
| IMPORT_TK name error
{yyerror ("';' expected"); RECOVER;}
;
type_import_on_demand_declaration:
IMPORT_TK name DOT_TK MULT_TK SC_TK
{
tree name = EXPR_WFL_NODE ($2);
/* Don't import java.lang.* twice. */
if (name != java_lang_id)
{
tree node = build_tree_list ($2, NULL_TREE);
read_import_dir ($2);
TREE_CHAIN (node) = ctxp->import_demand_list;
ctxp->import_demand_list = node;
}
}
| IMPORT_TK name DOT_TK error
{yyerror ("'*' expected"); RECOVER;}
| IMPORT_TK name DOT_TK MULT_TK error
{yyerror ("';' expected"); RECOVER;}
;
type_declaration:
class_declaration
{
maybe_generate_finit ();
maybe_generate_clinit ();
$$ = $1;
}
| interface_declaration
{
maybe_generate_clinit ();
$$ = $1;
}
| SC_TK
{ $$ = NULL; }
| error
{
YYERROR_NOW;
yyerror ("Class or interface declaration expected");
}
;
/* 19.7 Shortened from the original:
modifiers: modifier | modifiers modifier
modifier: any of public... */
modifiers:
MODIFIER_TK
{
$$ = (1 << $1);
}
| modifiers MODIFIER_TK
{
int acc = (1 << $2);
if ($$ & acc)
parse_error_context
(ctxp->modifier_ctx [$2], "Modifier `%s' declared twice",
java_accstring_lookup (acc));
else
{
$$ |= acc;
}
}
;
/* 19.8.1 Production from $8.1: Class Declaration */
class_declaration:
modifiers CLASS_TK identifier super interfaces
{ create_class ($1, $3, $4, $5); }
class_body
{
$$ = $7;
}
| CLASS_TK identifier super interfaces
{ create_class (0, $2, $3, $4); }
class_body
{
$$ = $6;
}
| modifiers CLASS_TK error
{yyerror ("Missing class name"); RECOVER;}
| CLASS_TK error
{yyerror ("Missing class name"); RECOVER;}
| CLASS_TK identifier error
{
if (!ctxp->class_err) yyerror ("'{' expected");
DRECOVER(class1);
}
| modifiers CLASS_TK identifier error
{if (!ctxp->class_err) yyerror ("'{' expected"); RECOVER;}
;
super:
{ $$ = NULL; }
| EXTENDS_TK class_type
{ $$ = $2; }
| EXTENDS_TK class_type error
{yyerror ("'{' expected"); ctxp->class_err=1;}
| EXTENDS_TK error
{yyerror ("Missing super class name"); ctxp->class_err=1;}
;
interfaces:
{ $$ = NULL_TREE; }
| IMPLEMENTS_TK interface_type_list
{ $$ = $2; }
| IMPLEMENTS_TK error
{
ctxp->class_err=1;
yyerror ("Missing interface name");
}
;
interface_type_list:
interface_type
{
ctxp->interface_number = 1;
$$ = build_tree_list ($1, NULL_TREE);
}
| interface_type_list C_TK interface_type
{
ctxp->interface_number++;
$$ = chainon ($1, build_tree_list ($3, NULL_TREE));
}
| interface_type_list C_TK error
{yyerror ("Missing interface name"); RECOVER;}
;
class_body:
OCB_TK CCB_TK
{
/* Store the location of the `}' when doing xrefs */
if (flag_emit_xref)
DECL_END_SOURCE_LINE (ctxp->current_parsed_class) =
EXPR_WFL_ADD_COL ($2.location, 1);
$$ = ctxp->current_parsed_class;
}
| OCB_TK class_body_declarations CCB_TK
{
/* Store the location of the `}' when doing xrefs */
if (flag_emit_xref)
DECL_END_SOURCE_LINE (ctxp->current_parsed_class) =
EXPR_WFL_ADD_COL ($3.location, 1);
$$ = ctxp->current_parsed_class;
}
;
class_body_declarations:
class_body_declaration
| class_body_declarations class_body_declaration
;
class_body_declaration:
class_member_declaration
| static_initializer
| constructor_declaration
| block /* Added, JDK1.1, instance initializer */
{ $$ = parse_jdk1_1_error ("instance initializer"); }
;
class_member_declaration:
field_declaration
| field_declaration SC_TK
{ $$ = $1; }
| method_declaration
| class_declaration /* Added, JDK1.1 inner classes */
{ $$ = parse_jdk1_1_error ("inner classe declaration"); }
| interface_declaration /* Added, JDK1.1 inner classes */
{ $$ = parse_jdk1_1_error ("inner interface declaration"); }
;
/* 19.8.2 Productions from 8.3: Field Declarations */
field_declaration:
type variable_declarators SC_TK
{ register_fields (0, $1, $2); }
| modifiers type variable_declarators SC_TK
{
check_modifiers
("Illegal modifier `%s' for field declaration",
$1, FIELD_MODIFIERS);
check_modifiers_consistency ($1);
register_fields ($1, $2, $3);
}
;
variable_declarators:
/* Should we use build_decl_list () instead ? FIXME */
variable_declarator /* Default rule */
| variable_declarators C_TK variable_declarator
{ $$ = chainon ($1, $3); }
| variable_declarators C_TK error
{yyerror ("Missing term"); RECOVER;}
;
variable_declarator:
variable_declarator_id
{ $$ = build_tree_list ($1, NULL_TREE); }
| variable_declarator_id ASSIGN_TK variable_initializer
{
if (java_error_count)
$3 = NULL_TREE;
$$ = build_tree_list
($1, build_assignment ($2.token, $2.location, $1, $3));
}
| variable_declarator_id ASSIGN_TK error
{
yyerror ("Missing variable initializer");
$$ = build_tree_list ($1, NULL_TREE);
RECOVER;
}
| variable_declarator_id ASSIGN_TK variable_initializer error
{
yyerror ("';' expected");
$$ = build_tree_list ($1, NULL_TREE);
RECOVER;
}
;
variable_declarator_id:
identifier
| variable_declarator_id OSB_TK CSB_TK
{ $$ = build_unresolved_array_type ($1); }
| identifier error
{yyerror ("Invalid declaration"); DRECOVER(vdi);}
| variable_declarator_id OSB_TK error
{yyerror ("']' expected"); DRECOVER(vdi);}
| variable_declarator_id CSB_TK error
{yyerror ("Unbalanced ']'"); DRECOVER(vdi);}
;
variable_initializer:
expression
| array_initializer
;
/* 19.8.3 Productions from 8.4: Method Declarations */
method_declaration:
method_header
{
current_function_decl = $1;
source_start_java_method (current_function_decl);
}
method_body
{ finish_method_declaration ($3); }
| method_header error
{YYNOT_TWICE yyerror ("'{' expected"); RECOVER;}
;
method_header:
type method_declarator throws
{ $$ = method_header (0, $1, $2, $3); }
| VOID_TK method_declarator throws
{ $$ = method_header (0, void_type_node, $2, $3); }
| modifiers type method_declarator throws
{ $$ = method_header ($1, $2, $3, $4); }
| modifiers VOID_TK method_declarator throws
{ $$ = method_header ($1, void_type_node, $3, $4); }
| type error
{RECOVER;}
| modifiers type error
{RECOVER;}
| VOID_TK error
{yyerror ("Identifier expected"); RECOVER;}
| modifiers VOID_TK error
{yyerror ("Identifier expected"); RECOVER;}
| modifiers error
{
yyerror ("Invalid method declaration, return type required");
RECOVER;
}
;
method_declarator:
identifier OP_TK CP_TK
{ $$ = method_declarator ($1, NULL_TREE); }
| identifier OP_TK formal_parameter_list CP_TK
{ $$ = method_declarator ($1, $3); }
| method_declarator OSB_TK CSB_TK
{
EXPR_WFL_LINECOL (wfl_operator) = $2.location;
TREE_PURPOSE ($1) =
build_unresolved_array_type (TREE_PURPOSE ($1));
parse_warning_context
(wfl_operator,
"Discouraged form of returned type specification");
}
| identifier OP_TK error
{yyerror ("')' expected"); DRECOVER(method_declarator);}
| method_declarator OSB_TK error
{yyerror ("']' expected"); RECOVER;}
;
formal_parameter_list:
formal_parameter
{
ctxp->formal_parameter_number = 1;
}
| formal_parameter_list C_TK formal_parameter
{
ctxp->formal_parameter_number += 1;
$$ = chainon ($1, $3);
}
| formal_parameter_list C_TK error
{yyerror ("Missing formal parameter term"); RECOVER;}
;
formal_parameter:
type variable_declarator_id
{
$$ = build_tree_list ($2, $1);
}
| modifiers type variable_declarator_id /* Added, JDK1.1 final parms */
{
parse_jdk1_1_error ("final parameters");
$$ = build_tree_list ($3, $2);
}
| type error
{yyerror ("Missing identifier"); RECOVER;}
| modifiers type error
{
SOURCE_FRONTEND_DEBUG (("Modifiers: %d", $1));
yyerror ("Missing identifier"); RECOVER;
}
;
throws:
{ $$ = NULL_TREE; }
| THROWS_TK class_type_list
{ $$ = $2; }
| THROWS_TK error
{yyerror ("Missing class type term"); RECOVER;}
;
class_type_list:
class_type
{ $$ = build_tree_list ($1, $1); }
| class_type_list C_TK class_type
{ $$ = tree_cons ($3, $3, $1); }
| class_type_list C_TK error
{yyerror ("Missing class type term"); RECOVER;}
;
method_body:
block
| block SC_TK
| SC_TK
{ $$ = NULL_TREE; } /* Probably not the right thing to do. */
;
/* 19.8.4 Productions from 8.5: Static Initializers */
static_initializer:
static block
{
TREE_CHAIN ($2) = ctxp->static_initialized;
ctxp->static_initialized = $2;
}
| static block SC_TK /* Shouldn't be here. FIXME */
{
TREE_CHAIN ($2) = ctxp->static_initialized;
ctxp->static_initialized = $2;
}
;
static: /* Test lval.sub_token here */
MODIFIER_TK
{
SOURCE_FRONTEND_DEBUG (("Modifiers: %d", $1));
}
;
/* 19.8.5 Productions from 8.6: Constructor Declarations */
constructor_declaration:
constructor_header
{
current_function_decl = $1;
source_start_java_method (current_function_decl);
}
constructor_body
{ finish_method_declaration ($3); }
;
constructor_header:
constructor_declarator throws
{ $$ = method_header (0, NULL_TREE, $1, $2); }
| modifiers constructor_declarator throws
{ $$ = method_header ($1, NULL_TREE, $2, $3); }
;
constructor_declarator:
simple_name OP_TK CP_TK
{ $$ = method_declarator ($1, NULL_TREE); }
| simple_name OP_TK formal_parameter_list CP_TK
{ $$ = method_declarator ($1, $3); }
;
constructor_body:
/* Unlike regular method, we always need a complete (empty)
body so we can safely perform all the required code
addition (super invocation and field initialization) */
block_begin constructor_block_end
{
BLOCK_EXPR_BODY ($2) = empty_stmt_node;
$$ = $2;
}
| block_begin explicit_constructor_invocation constructor_block_end
{ $$ = $3; }
| block_begin block_statements constructor_block_end
{ $$ = $3; }
| block_begin explicit_constructor_invocation block_statements constructor_block_end
{ $$ = $4; }
;
constructor_block_end:
block_end
| block_end SC_TK
/* Error recovery for that rule moved down expression_statement: rule. */
explicit_constructor_invocation:
this_or_super OP_TK CP_TK SC_TK
{
$$ = build_method_invocation ($1, NULL_TREE);
$$ = build_debugable_stmt (EXPR_WFL_LINECOL ($1), $$);
$$ = java_method_add_stmt (current_function_decl, $$);
}
| this_or_super OP_TK argument_list CP_TK SC_TK
{
$$ = build_method_invocation ($1, $3);
$$ = build_debugable_stmt (EXPR_WFL_LINECOL ($1), $$);
$$ = java_method_add_stmt (current_function_decl, $$);
}
/* Added, JDK1.1 inner classes. Modified because the rule
'primary' couldn't work. */
| name DOT_TK SUPER_TK OP_TK argument_list CP_TK SC_TK
{$$ = parse_jdk1_1_error ("explicit constructor invocation"); }
| name DOT_TK SUPER_TK OP_TK CP_TK SC_TK
{$$ = parse_jdk1_1_error ("explicit constructor invocation"); }
;
this_or_super: /* Added, simplifies error diagnostics */
THIS_TK
{
tree wfl = build_wfl_node (this_identifier_node);
EXPR_WFL_LINECOL (wfl) = $1.location;
$$ = wfl;
}
| SUPER_TK
{
tree wfl = build_wfl_node (super_identifier_node);
EXPR_WFL_LINECOL (wfl) = $1.location;
$$ = wfl;
}
;
/* 19.9 Productions from 9: Interfaces */
/* 19.9.1 Productions from 9.1: Interfaces Declarations */
interface_declaration:
INTERFACE_TK identifier
{ create_interface (0, $2, NULL_TREE); }
interface_body
{
$$ = $4;
}
| modifiers INTERFACE_TK identifier
{ create_interface ($1, $3, NULL_TREE); }
interface_body
{
$$ = $5;
}
| INTERFACE_TK identifier extends_interfaces
{ create_interface (0, $2, $3); }
interface_body
{
$$ = $5;
}
| modifiers INTERFACE_TK identifier extends_interfaces
{ create_interface ($1, $3, $4); }
interface_body
{
$$ = $6;
}
| INTERFACE_TK identifier error
{yyerror ("'{' expected"); RECOVER;}
| modifiers INTERFACE_TK identifier error
{yyerror ("'{' expected"); RECOVER;}
;
extends_interfaces:
EXTENDS_TK interface_type
{
ctxp->interface_number = 1;
$$ = build_tree_list ($2, NULL_TREE);
}
| extends_interfaces C_TK interface_type
{
ctxp->interface_number++;
$$ = chainon ($1, build_tree_list ($3, NULL_TREE));
}
| EXTENDS_TK error
{yyerror ("Invalid interface type"); RECOVER;}
| extends_interfaces C_TK error
{yyerror ("Missing term"); RECOVER;}
;
interface_body:
OCB_TK CCB_TK
{ $$ = NULL_TREE; }
| OCB_TK interface_member_declarations CCB_TK
{ $$ = NULL_TREE; }
;
interface_member_declarations:
interface_member_declaration
| interface_member_declarations interface_member_declaration
;
interface_member_declaration:
constant_declaration
| abstract_method_declaration
| class_declaration /* Added, JDK1.1 inner classes */
{ $$ = parse_jdk1_1_error ("inner class declaration"); }
| interface_declaration /* Added, JDK1.1 inner classes */
{ $$ = parse_jdk1_1_error ("inner interface declaration"); }
;
constant_declaration:
field_declaration
;
abstract_method_declaration:
method_header SC_TK
{
check_abstract_method_header ($1);
current_function_decl = NULL_TREE; /* FIXME ? */
}
| method_header error
{yyerror ("';' expected"); RECOVER;}
;
/* 19.10 Productions from 10: Arrays */
array_initializer:
OCB_TK CCB_TK
{ $$ = build_new_array_init ($1.location, NULL_TREE); }
| OCB_TK variable_initializers CCB_TK
{ $$ = build_new_array_init ($1.location, $2); }
| OCB_TK variable_initializers C_TK CCB_TK
{ $$ = build_new_array_init ($1.location, $2); }
;
variable_initializers:
variable_initializer
{
$$ = tree_cons (maybe_build_array_element_wfl ($1),
$1, NULL_TREE);
}
| variable_initializers C_TK variable_initializer
{
$$ = tree_cons (maybe_build_array_element_wfl ($3), $3, $1);
}
| variable_initializers C_TK error
{yyerror ("Missing term"); RECOVER;}
;
/* 19.11 Production from 14: Blocks and Statements */
block:
OCB_TK CCB_TK
{
/* Store the location of the `}' when doing xrefs */
if (current_function_decl && flag_emit_xref)
DECL_END_SOURCE_LINE (current_function_decl) =
EXPR_WFL_ADD_COL ($2.location, 1);
$$ = empty_stmt_node;
}
| block_begin block_statements block_end
{ $$ = $3; }
;
block_begin:
OCB_TK
{ enter_block (); }
;
block_end:
CCB_TK
{
maybe_absorb_scoping_blocks ();
/* Store the location of the `}' when doing xrefs */
if (current_function_decl && flag_emit_xref)
DECL_END_SOURCE_LINE (current_function_decl) =
EXPR_WFL_ADD_COL ($1.location, 1);
$$ = exit_block ();
}
;
block_statements:
block_statement
| block_statements block_statement
;
block_statement:
local_variable_declaration_statement
| statement
{ java_method_add_stmt (current_function_decl, $1); }
| class_declaration /* Added, JDK1.1 inner classes */
{ parse_jdk1_1_error ("inner class declaration"); }
;
local_variable_declaration_statement:
local_variable_declaration SC_TK /* Can't catch missing ';' here */
;
local_variable_declaration:
type variable_declarators
{ declare_local_variables (0, $1, $2); }
| modifiers type variable_declarators /* Added, JDK1.1 final locals */
{ declare_local_variables ($1, $2, $3); }
;
statement:
statement_without_trailing_substatement
| labeled_statement
| if_then_statement
| if_then_else_statement
| while_statement
| for_statement
{ $$ = exit_block (); }
;
statement_nsi:
statement_without_trailing_substatement
| labeled_statement_nsi
| if_then_else_statement_nsi
| while_statement_nsi
| for_statement_nsi
{ $$ = exit_block (); }
;
statement_without_trailing_substatement:
block
| empty_statement
| expression_statement
| switch_statement
| do_statement
| break_statement
| continue_statement
| return_statement
| synchronized_statement
| throw_statement
| try_statement
;
empty_statement:
SC_TK
{ $$ = empty_stmt_node; }
;
label_decl:
identifier REL_CL_TK
{
$$ = build_labeled_block (EXPR_WFL_LINECOL ($1),
EXPR_WFL_NODE ($1));
pushlevel (2);
push_labeled_block ($$);
PUSH_LABELED_BLOCK ($$);
}
;
labeled_statement:
label_decl statement
{ $$ = finish_labeled_statement ($1, $2); }
| identifier error
{yyerror ("':' expected"); RECOVER;}
;
labeled_statement_nsi:
label_decl statement_nsi
{ $$ = finish_labeled_statement ($1, $2); }
;
/* We concentrate here a bunch of error handling rules that we couldn't write
earlier, because expression_statement catches a missing ';'. */
expression_statement:
statement_expression SC_TK
{
/* We have a statement. Generate a WFL around it so
we can debug it */
$$ = build_expr_wfl ($1, input_filename, lineno, 0);
/* We know we have a statement, so set the debug
info to be eventually generate here. */
$$ = JAVA_MAYBE_GENERATE_DEBUG_INFO ($$);
}
| error SC_TK
{
if (ctxp->prevent_ese != lineno)
yyerror ("Invalid expression statement");
DRECOVER (expr_stmt);
}
| error OCB_TK
{
if (ctxp->prevent_ese != lineno)
yyerror ("Invalid expression statement");
DRECOVER (expr_stmt);
}
| error CCB_TK
{
if (ctxp->prevent_ese != lineno)
yyerror ("Invalid expression statement");
DRECOVER (expr_stmt);
}
| this_or_super OP_TK error
{yyerror ("')' expected"); RECOVER;}
| this_or_super OP_TK CP_TK error
{
yyerror ("Constructor invocation must be first "
"thing in a constructor");
RECOVER;
}
| this_or_super OP_TK argument_list error
{yyerror ("')' expected"); RECOVER;}
| this_or_super OP_TK argument_list CP_TK error
{
yyerror ("Constructor invocation must be first "
"thing in a constructor");
RECOVER;
}
| name DOT_TK SUPER_TK error
{yyerror ("'(' expected"); RECOVER;}
| name DOT_TK SUPER_TK OP_TK error
{yyerror ("')' expected"); RECOVER;}
| name DOT_TK SUPER_TK OP_TK argument_list error
{yyerror ("')' expected"); RECOVER;}
| name DOT_TK SUPER_TK OP_TK argument_list CP_TK error
{yyerror ("';' expected"); RECOVER;}
| name DOT_TK SUPER_TK OP_TK CP_TK error
{yyerror ("';' expected"); RECOVER;}
;
statement_expression:
assignment
| pre_increment_expression
| pre_decrement_expression
| post_increment_expression
| post_decrement_expression
| method_invocation
| class_instance_creation_expression
;
if_then_statement:
IF_TK OP_TK expression CP_TK statement
{
$$ = build_if_else_statement ($2.location, $3,
$5, NULL_TREE);
}
| IF_TK error
{yyerror ("'(' expected"); RECOVER;}
| IF_TK OP_TK error
{yyerror ("Missing term"); RECOVER;}
| IF_TK OP_TK expression error
{yyerror ("')' expected"); RECOVER;}
;
if_then_else_statement:
IF_TK OP_TK expression CP_TK statement_nsi ELSE_TK statement
{ $$ = build_if_else_statement ($2.location, $3, $5, $7); }
;
if_then_else_statement_nsi:
IF_TK OP_TK expression CP_TK statement_nsi ELSE_TK statement_nsi
{ $$ = build_if_else_statement ($2.location, $3, $5, $7); }
;
switch_statement:
switch_expression
{
enter_block ();
}
switch_block
{
/* Make into "proper list" of COMPOUND_EXPRs.
I.e. make the last statment also have its own
COMPOUND_EXPR. */
maybe_absorb_scoping_blocks ();
TREE_OPERAND ($1, 1) = exit_block ();
$$ = build_debugable_stmt (EXPR_WFL_LINECOL ($1), $1);
}
;
switch_expression:
SWITCH_TK OP_TK expression CP_TK
{
$$ = build (SWITCH_EXPR, NULL_TREE, $3, NULL_TREE);
EXPR_WFL_LINECOL ($$) = $2.location;
}
| SWITCH_TK error
{yyerror ("'(' expected"); RECOVER;}
| SWITCH_TK OP_TK error
{yyerror ("Missing term or ')'"); DRECOVER(switch_statement);}
| SWITCH_TK OP_TK expression CP_TK error
{yyerror ("'{' expected"); RECOVER;}
;
/* Default assignment is there to avoid type node on switch_block
node. */
switch_block:
OCB_TK CCB_TK
{ $$ = NULL_TREE; }
| OCB_TK switch_labels CCB_TK
{ $$ = NULL_TREE; }
| OCB_TK switch_block_statement_groups CCB_TK
{ $$ = NULL_TREE; }
| OCB_TK switch_block_statement_groups switch_labels CCB_TK
{ $$ = NULL_TREE; }
;
switch_block_statement_groups:
switch_block_statement_group
| switch_block_statement_groups switch_block_statement_group
;
switch_block_statement_group:
switch_labels block_statements
;
switch_labels:
switch_label
| switch_labels switch_label
;
switch_label:
CASE_TK constant_expression REL_CL_TK
{
tree lab = build1 (CASE_EXPR, NULL_TREE, $2);
EXPR_WFL_LINECOL (lab) = $1.location;
java_method_add_stmt (current_function_decl, lab);
}
| DEFAULT_TK REL_CL_TK
{
tree lab = build1 (DEFAULT_EXPR, NULL_TREE, NULL_TREE);
EXPR_WFL_LINECOL (lab) = $1.location;
java_method_add_stmt (current_function_decl, lab);
}
| CASE_TK error
{yyerror ("Missing or invalid constant expression"); RECOVER;}
| CASE_TK constant_expression error
{yyerror ("':' expected"); RECOVER;}
| DEFAULT_TK error
{yyerror ("':' expected"); RECOVER;}
;
while_expression:
WHILE_TK OP_TK expression CP_TK
{
tree body = build_loop_body ($2.location, $3, 0);
$$ = build_new_loop (body);
}
;
while_statement:
while_expression statement
{ $$ = finish_loop_body (0, NULL_TREE, $2, 0); }
| WHILE_TK error
{YYERROR_NOW; yyerror ("'(' expected"); RECOVER;}
| WHILE_TK OP_TK error
{yyerror ("Missing term and ')' expected"); RECOVER;}
| WHILE_TK OP_TK expression error
{yyerror ("')' expected"); RECOVER;}
;
while_statement_nsi:
while_expression statement_nsi
{ $$ = finish_loop_body (0, NULL_TREE, $2, 0); }
;
do_statement_begin:
DO_TK
{
tree body = build_loop_body (0, NULL_TREE, 1);
$$ = build_new_loop (body);
}
/* Need error handing here. FIXME */
;
do_statement:
do_statement_begin statement WHILE_TK OP_TK expression CP_TK SC_TK
{ $$ = finish_loop_body ($4.location, $5, $2, 1); }
;
for_statement:
for_begin SC_TK expression SC_TK for_update CP_TK statement
{ $$ = finish_for_loop (EXPR_WFL_LINECOL ($3), $3, $5, $7); }
| for_begin SC_TK SC_TK for_update CP_TK statement
{
$$ = finish_for_loop (0, NULL_TREE, $4, $6);
/* We have not condition, so we get rid of the EXIT_EXPR */
LOOP_EXPR_BODY_CONDITION_EXPR (LOOP_EXPR_BODY ($$), 0) =
empty_stmt_node;
}
| for_begin SC_TK error
{yyerror ("Invalid control expression"); RECOVER;}
| for_begin SC_TK expression SC_TK error
{yyerror ("Invalid update expression"); RECOVER;}
| for_begin SC_TK SC_TK error
{yyerror ("Invalid update expression"); RECOVER;}
;
for_statement_nsi:
for_begin SC_TK expression SC_TK for_update CP_TK statement_nsi
{ $$ = finish_for_loop (EXPR_WFL_LINECOL ($3), $3, $5, $7);}
| for_begin SC_TK SC_TK for_update CP_TK statement_nsi
{
$$ = finish_for_loop (0, NULL_TREE, $4, $6);
/* We have not condition, so we get rid of the EXIT_EXPR */
LOOP_EXPR_BODY_CONDITION_EXPR (LOOP_EXPR_BODY ($$), 0) =
empty_stmt_node;
}
;
for_header:
FOR_TK OP_TK
{
/* This scope defined for local variable that may be
defined within the scope of the for loop */
enter_block ();
}
| FOR_TK error
{yyerror ("'(' expected"); DRECOVER(for_1);}
| FOR_TK OP_TK error
{yyerror ("Invalid init statement"); RECOVER;}
;
for_begin:
for_header for_init
{
/* We now declare the loop body. The loop is
declared as a for loop. */
tree body = build_loop_body (0, NULL_TREE, 0);
$$ = build_new_loop (body);
IS_FOR_LOOP_P ($$) = 1;
/* The loop is added to the current block the for
statement is defined within */
java_method_add_stmt (current_function_decl, $$);
}
;
for_init: /* Can be empty */
{ $$ = empty_stmt_node; }
| statement_expression_list
{
/* Init statement recorded within the previously
defined block scope */
$$ = java_method_add_stmt (current_function_decl, $1);
}
| local_variable_declaration
{
/* Local variable are recorded within the previously
defined block scope */
$$ = NULL_TREE;
}
| statement_expression_list error
{yyerror ("';' expected"); DRECOVER(for_init_1);}
;
for_update: /* Can be empty */
{$$ = empty_stmt_node;}
| statement_expression_list
{ $$ = build_debugable_stmt (BUILD_LOCATION (), $1); }
;
statement_expression_list:
statement_expression
{ $$ = add_stmt_to_compound (NULL_TREE, NULL_TREE, $1); }
| statement_expression_list C_TK statement_expression
{ $$ = add_stmt_to_compound ($1, NULL_TREE, $3); }
| statement_expression_list C_TK error
{yyerror ("Missing term"); RECOVER;}
;
break_statement:
BREAK_TK SC_TK
{ $$ = build_bc_statement ($1.location, 1, NULL_TREE); }
| BREAK_TK identifier SC_TK
{ $$ = build_bc_statement ($1.location, 1, $2); }
| BREAK_TK error
{yyerror ("Missing term"); RECOVER;}
| BREAK_TK identifier error
{yyerror ("';' expected"); RECOVER;}
;
continue_statement:
CONTINUE_TK SC_TK
{ $$ = build_bc_statement ($1.location, 0, NULL_TREE); }
| CONTINUE_TK identifier SC_TK
{ $$ = build_bc_statement ($1.location, 0, $2); }
| CONTINUE_TK error
{yyerror ("Missing term"); RECOVER;}
| CONTINUE_TK identifier error
{yyerror ("';' expected"); RECOVER;}
;
return_statement:
RETURN_TK SC_TK
{ $$ = build_return ($1.location, NULL_TREE); }
| RETURN_TK expression SC_TK
{ $$ = build_return ($1.location, $2); }
| RETURN_TK error
{yyerror ("Missing term"); RECOVER;}
| RETURN_TK expression error
{yyerror ("';' expected"); RECOVER;}
;
throw_statement:
THROW_TK expression SC_TK
{
$$ = build1 (THROW_EXPR, NULL_TREE, $2);
EXPR_WFL_LINECOL ($$) = $1.location;
}
| THROW_TK error
{yyerror ("Missing term"); RECOVER;}
| THROW_TK expression error
{yyerror ("';' expected"); RECOVER;}
;
synchronized_statement:
synchronized OP_TK expression CP_TK block
{
$$ = build (SYNCHRONIZED_EXPR, NULL_TREE, $3, $5);
EXPR_WFL_LINECOL ($$) =
EXPR_WFL_LINECOL (MODIFIER_WFL (SYNCHRONIZED_TK));
}
| synchronized OP_TK expression CP_TK error
{yyerror ("'{' expected"); RECOVER;}
| synchronized error
{yyerror ("'(' expected"); RECOVER;}
| synchronized OP_TK error CP_TK
{yyerror ("Missing term"); RECOVER;}
| synchronized OP_TK error
{yyerror ("Missing term"); RECOVER;}
;
synchronized:
MODIFIER_TK
{
if ((1 << $1) != ACC_SYNCHRONIZED)
fatal ("synchronized was '%d' - yyparse", (1 << $1));
}
;
try_statement:
TRY_TK block catches
{ $$ = build_try_statement ($1.location, $2, $3); }
| TRY_TK block finally
{ $$ = build_try_finally_statement ($1.location, $2, $3); }
| TRY_TK block catches finally
{ $$ = build_try_finally_statement
($1.location, build_try_statement ($1.location,
$2, $3), $4);
}
| TRY_TK error
{yyerror ("'{' expected"); DRECOVER (try_statement);}
;
catches:
catch_clause
| catches catch_clause
{
TREE_CHAIN ($2) = $1;
$$ = $2;
}
;
catch_clause:
catch_clause_parameter block
{
java_method_add_stmt (current_function_decl, $2);
exit_block ();
$$ = $1;
}
catch_clause_parameter:
CATCH_TK OP_TK formal_parameter CP_TK
{
/* We add a block to define a scope for
formal_parameter (CCBP). The formal parameter is
declared initialized by the appropriate function
call */
tree ccpb = enter_block ();
tree init = build_assignment (ASSIGN_TK, $2.location,
TREE_PURPOSE ($3),
soft_exceptioninfo_call_node);
declare_local_variables (0, TREE_VALUE ($3),
build_tree_list (TREE_PURPOSE ($3),
init));
$$ = build1 (CATCH_EXPR, NULL_TREE, ccpb);
EXPR_WFL_LINECOL ($$) = $1.location;
}
| CATCH_TK error
{yyerror ("'(' expected"); RECOVER;}
| CATCH_TK OP_TK error
{yyerror ("Missing term or ')' expected"); DRECOVER (2);}
| CATCH_TK OP_TK error CP_TK /* That's for () */
{yyerror ("')' expected"); DRECOVER (1);}
;
finally:
FINALLY_TK block
{ $$ = $2; }
| FINALLY_TK error
{yyerror ("'{' expected"); RECOVER; }
;
/* 19.12 Production from 15: Expressions */
primary:
primary_no_new_array
| array_creation_expression
;
primary_no_new_array:
literal
| THIS_TK
{ $$ = build_this ($1.location); }
| OP_TK expression CP_TK
{$$ = $2;}
| class_instance_creation_expression
| field_access
| method_invocation
| array_access
/* type DOT_TK CLASS_TK doens't work. So we split the rule
'type' into its components. Missing is something for array,
which will complete the reference_type part. FIXME */
| name DOT_TK CLASS_TK /* Added, JDK1.1 class literals */
{ $$ = parse_jdk1_1_error ("named class literals"); }
| primitive_type DOT_TK CLASS_TK /* Added, JDK1.1 class literals */
{ $$ = build_class_ref ($1); }
| VOID_TK DOT_TK CLASS_TK /* Added, JDK1.1 class literals */
{ $$ = build_class_ref (void_type_node); }
/* Added, JDK1.1 inner classes. Documentation is wrong
refering to a 'ClassName' (class_name) rule that doesn't
exist. Used name instead. */
| name DOT_TK THIS_TK
{ $$ = parse_jdk1_1_error ("class literals"); }
| OP_TK expression error
{yyerror ("')' expected"); RECOVER;}
| name DOT_TK error
{yyerror ("'class' or 'this' expected" ); RECOVER;}
| primitive_type DOT_TK error
{yyerror ("'class' expected" ); RECOVER;}
| VOID_TK DOT_TK error
{yyerror ("'class' expected" ); RECOVER;}
;
class_instance_creation_expression:
NEW_TK class_type OP_TK argument_list CP_TK
{ $$ = build_new_invocation ($2, $4); }
| NEW_TK class_type OP_TK CP_TK
{ $$ = build_new_invocation ($2, NULL_TREE); }
/* Added, JDK1.1 inner classes but modified to use
'class_type' instead of 'TypeName' (type_name) mentionned
in the documentation but doesn't exist. */
| NEW_TK class_type OP_TK argument_list CP_TK class_body
{ $$ = parse_jdk1_1_error ("inner class instance creation"); }
| NEW_TK class_type OP_TK CP_TK class_body
{ $$ = parse_jdk1_1_error ("inner class instance creation"); }
/* Added, JDK1.1 inner classes, modified to use name or
primary instead of primary solely which couldn't work in
all situations. */
| something_dot_new identifier OP_TK CP_TK
| something_dot_new identifier OP_TK CP_TK class_body
| something_dot_new identifier OP_TK argument_list CP_TK
| something_dot_new identifier OP_TK argument_list CP_TK class_body
| NEW_TK error SC_TK
{yyerror ("'(' expected"); DRECOVER(new_1);}
| NEW_TK class_type error
{yyerror ("'(' expected"); RECOVER;}
| NEW_TK class_type OP_TK error
{yyerror ("')' or term expected"); RECOVER;}
| NEW_TK class_type OP_TK argument_list error
{yyerror ("')' expected"); RECOVER;}
| something_dot_new error
{YYERROR_NOW; yyerror ("Identifier expected"); RECOVER;}
| something_dot_new identifier error
{yyerror ("'(' expected"); RECOVER;}
;
something_dot_new: /* Added, not part of the specs. */
name DOT_TK NEW_TK
| primary DOT_TK NEW_TK
;
argument_list:
expression
{
$$ = tree_cons (NULL_TREE, $1, NULL_TREE);
ctxp->formal_parameter_number = 1;
}
| argument_list C_TK expression
{
ctxp->formal_parameter_number += 1;
$$ = tree_cons (NULL_TREE, $3, $1);
}
| argument_list C_TK error
{yyerror ("Missing term"); RECOVER;}
;
array_creation_expression:
NEW_TK primitive_type dim_exprs
{ $$ = build_newarray_node ($2, $3, 0); }
| NEW_TK class_or_interface_type dim_exprs
{ $$ = build_newarray_node ($2, $3, 0); }
| NEW_TK primitive_type dim_exprs dims
{ $$ = build_newarray_node ($2, $3, CURRENT_OSB (ctxp));}
| NEW_TK class_or_interface_type dim_exprs dims
{ $$ = build_newarray_node ($2, $3, CURRENT_OSB (ctxp));}
/* Added, JDK1.1 anonymous array. Initial documentation rule
modified */
| NEW_TK class_or_interface_type dims array_initializer
{ $$ = parse_jdk1_1_error ("anonymous array"); }
| NEW_TK primitive_type dims array_initializer
{ $$ = parse_jdk1_1_error ("anonymous array"); }
| NEW_TK error CSB_TK
{yyerror ("'[' expected"); DRECOVER ("]");}
| NEW_TK error OSB_TK
{yyerror ("']' expected"); RECOVER;}
;
dim_exprs:
dim_expr
{ $$ = build_tree_list (NULL_TREE, $1); }
| dim_exprs dim_expr
{ $$ = tree_cons (NULL_TREE, $2, $$); }
;
dim_expr:
OSB_TK expression CSB_TK
{
EXPR_WFL_LINECOL ($2) = $1.location;
$$ = $2;
}
| OSB_TK expression error
{yyerror ("']' expected"); RECOVER;}
| OSB_TK error
{
yyerror ("Missing term");
yyerror ("']' expected");
RECOVER;
}
;
dims:
OSB_TK CSB_TK
{
int allocate = 0;
/* If not initialized, allocate memory for the osb
numbers stack */
if (!ctxp->osb_limit)
{
allocate = ctxp->osb_limit = 32;
ctxp->osb_depth = -1;
}
/* If capacity overflown, reallocate a bigger chuck */
else if (ctxp->osb_depth+1 == ctxp->osb_limit)
allocate = ctxp->osb_limit << 1;
if (allocate)
{
allocate *= sizeof (int);
if (ctxp->osb_number)
ctxp->osb_number = (int *)xrealloc (ctxp->osb_number,
allocate);
else
ctxp->osb_number = (int *)xmalloc (allocate);
}
ctxp->osb_depth++;
CURRENT_OSB (ctxp) = 1;
}
| dims OSB_TK CSB_TK
{ CURRENT_OSB (ctxp)++; }
| dims OSB_TK error
{ yyerror ("']' expected"); RECOVER;}
;
field_access:
primary DOT_TK identifier
{ $$ = make_qualified_primary ($1, $3, $2.location); }
/* FIXME - REWRITE TO:
{ $$ = build_binop (COMPONENT_REF, $2.location, $1, $3); } */
| SUPER_TK DOT_TK identifier
{
tree super_wfl =
build_wfl_node (super_identifier_node);
EXPR_WFL_LINECOL (super_wfl) = $1.location;
$$ = make_qualified_name (super_wfl, $3, $2.location);
}
| SUPER_TK error
{yyerror ("Field expected"); DRECOVER (super_field_acces);}
;
method_invocation:
name OP_TK CP_TK
{ $$ = build_method_invocation ($1, NULL_TREE); }
| name OP_TK argument_list CP_TK
{ $$ = build_method_invocation ($1, $3); }
| primary DOT_TK identifier OP_TK CP_TK
{
if (TREE_CODE ($1) == THIS_EXPR)
$$ = build_this_super_qualified_invocation
(1, $3, NULL_TREE, 0, $2.location);
else
{
tree invok = build_method_invocation ($3, NULL_TREE);
$$ = make_qualified_primary ($1, invok, $2.location);
}
}
| primary DOT_TK identifier OP_TK argument_list CP_TK
{
if (TREE_CODE ($1) == THIS_EXPR)
$$ = build_this_super_qualified_invocation
(1, $3, $5, 0, $2.location);
else
{
tree invok = build_method_invocation ($3, $5);
$$ = make_qualified_primary ($1, invok, $2.location);
}
}
| SUPER_TK DOT_TK identifier OP_TK CP_TK
{
$$ = build_this_super_qualified_invocation
(0, $3, NULL_TREE, $1.location, $2.location);
}
| SUPER_TK DOT_TK identifier OP_TK argument_list CP_TK
{
$$ = build_this_super_qualified_invocation
(0, $3, $5, $1.location, $2.location);
}
/* Screws up thing. I let it here until I'm convinced it can
be removed. FIXME
| primary DOT_TK error
{yyerror ("'(' expected"); DRECOVER(bad);} */
| SUPER_TK DOT_TK error CP_TK
{ yyerror ("'(' expected"); DRECOVER (method_invocation); }
| SUPER_TK DOT_TK error DOT_TK
{ yyerror ("'(' expected"); DRECOVER (method_invocation); }
;
array_access:
name OSB_TK expression CSB_TK
{ $$ = build_array_ref ($2.location, $1, $3); }
| primary_no_new_array OSB_TK expression CSB_TK
{ $$ = build_array_ref ($2.location, $1, $3); }
| name OSB_TK error
{
yyerror ("Missing term and ']' expected");
DRECOVER(array_access);
}
| name OSB_TK expression error
{
yyerror ("']' expected");
DRECOVER(array_access);
}
| primary_no_new_array OSB_TK error
{
yyerror ("Missing term and ']' expected");
DRECOVER(array_access);
}
| primary_no_new_array OSB_TK expression error
{
yyerror ("']' expected");
DRECOVER(array_access);
}
;
postfix_expression:
primary
| name
| post_increment_expression
| post_decrement_expression
;
post_increment_expression:
postfix_expression INCR_TK
{ $$ = build_incdec ($2.token, $2.location, $1, 1); }
;
post_decrement_expression:
postfix_expression DECR_TK
{ $$ = build_incdec ($2.token, $2.location, $1, 1); }
;
unary_expression:
pre_increment_expression
| pre_decrement_expression
| PLUS_TK unary_expression
{$$ = build_unaryop ($1.token, $1.location, $2); }
| MINUS_TK unary_expression
{$$ = build_unaryop ($1.token, $1.location, $2); }
| unary_expression_not_plus_minus
| PLUS_TK error
{yyerror ("Missing term"); RECOVER}
| MINUS_TK error
{yyerror ("Missing term"); RECOVER}
;
pre_increment_expression:
INCR_TK unary_expression
{$$ = build_incdec ($1.token, $1.location, $2, 0); }
| INCR_TK error
{yyerror ("Missing term"); RECOVER}
;
pre_decrement_expression:
DECR_TK unary_expression
{$$ = build_incdec ($1.token, $1.location, $2, 0); }
| DECR_TK error
{yyerror ("Missing term"); RECOVER}
;
unary_expression_not_plus_minus:
postfix_expression
| NOT_TK unary_expression
{$$ = build_unaryop ($1.token, $1.location, $2); }
| NEG_TK unary_expression
{$$ = build_unaryop ($1.token, $1.location, $2); }
| cast_expression
| NOT_TK error
{yyerror ("Missing term"); RECOVER}
| NEG_TK error
{yyerror ("Missing term"); RECOVER}
;
cast_expression: /* Error handling here is potentially weak */
OP_TK primitive_type dims CP_TK unary_expression
{
tree type = $2;
while (CURRENT_OSB (ctxp)--)
type = build_java_array_type (type, -1);
ctxp->osb_depth--;
$$ = build_cast ($1.location, type, $5);
}
| OP_TK primitive_type CP_TK unary_expression
{ $$ = build_cast ($1.location, $2, $4); }
| OP_TK expression CP_TK unary_expression_not_plus_minus
{ $$ = build_cast ($1.location, $2, $4); }
| OP_TK name dims CP_TK unary_expression_not_plus_minus
{
char *ptr;
while (CURRENT_OSB (ctxp)--)
obstack_1grow (&temporary_obstack, '[');
ctxp->osb_depth--;
obstack_grow0 (&temporary_obstack,
IDENTIFIER_POINTER (EXPR_WFL_NODE ($2)),
IDENTIFIER_LENGTH (EXPR_WFL_NODE ($2)));
ptr = obstack_finish (&temporary_obstack);
EXPR_WFL_NODE ($2) = get_identifier (ptr);
$$ = build_cast ($1.location, $2, $5);
}
| OP_TK primitive_type OSB_TK error
{yyerror ("']' expected, invalid type expression");}
| OP_TK error
{
if (ctxp->prevent_ese != lineno)
yyerror ("Invalid type expression"); RECOVER;
RECOVER;
}
| OP_TK primitive_type dims CP_TK error
{yyerror ("Missing term"); RECOVER;}
| OP_TK primitive_type CP_TK error
{yyerror ("Missing term"); RECOVER;}
| OP_TK name dims CP_TK error
{yyerror ("Missing term"); RECOVER;}
;
multiplicative_expression:
unary_expression
| multiplicative_expression MULT_TK unary_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token),
$2.location, $1, $3);
}
| multiplicative_expression DIV_TK unary_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| multiplicative_expression REM_TK unary_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| multiplicative_expression MULT_TK error
{yyerror ("Missing term"); RECOVER;}
| multiplicative_expression DIV_TK error
{yyerror ("Missing term"); RECOVER;}
| multiplicative_expression REM_TK error
{yyerror ("Missing term"); RECOVER;}
;
additive_expression:
multiplicative_expression
| additive_expression PLUS_TK multiplicative_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| additive_expression MINUS_TK multiplicative_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| additive_expression PLUS_TK error
{yyerror ("Missing term"); RECOVER;}
| additive_expression MINUS_TK error
{yyerror ("Missing term"); RECOVER;}
;
shift_expression:
additive_expression
| shift_expression LS_TK additive_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| shift_expression SRS_TK additive_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| shift_expression ZRS_TK additive_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| shift_expression LS_TK error
{yyerror ("Missing term"); RECOVER;}
| shift_expression SRS_TK error
{yyerror ("Missing term"); RECOVER;}
| shift_expression ZRS_TK error
{yyerror ("Missing term"); RECOVER;}
;
relational_expression:
shift_expression
| relational_expression LT_TK shift_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| relational_expression GT_TK shift_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| relational_expression LTE_TK shift_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| relational_expression GTE_TK shift_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| relational_expression INSTANCEOF_TK reference_type
{ $$ = build_binop (INSTANCEOF_EXPR, $2.location, $1, $3); }
| relational_expression LT_TK error
{yyerror ("Missing term"); RECOVER;}
| relational_expression GT_TK error
{yyerror ("Missing term"); RECOVER;}
| relational_expression LTE_TK error
{yyerror ("Missing term"); RECOVER;}
| relational_expression GTE_TK error
{yyerror ("Missing term"); RECOVER;}
| relational_expression INSTANCEOF_TK error
{yyerror ("Invalid reference type"); RECOVER;}
;
equality_expression:
relational_expression
| equality_expression EQ_TK relational_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| equality_expression NEQ_TK relational_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| equality_expression EQ_TK error
{yyerror ("Missing term"); RECOVER;}
| equality_expression NEQ_TK error
{yyerror ("Missing term"); RECOVER;}
;
and_expression:
equality_expression
| and_expression AND_TK equality_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| and_expression AND_TK error
{yyerror ("Missing term"); RECOVER;}
;
exclusive_or_expression:
and_expression
| exclusive_or_expression XOR_TK and_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| exclusive_or_expression XOR_TK error
{yyerror ("Missing term"); RECOVER;}
;
inclusive_or_expression:
exclusive_or_expression
| inclusive_or_expression OR_TK exclusive_or_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| inclusive_or_expression OR_TK error
{yyerror ("Missing term"); RECOVER;}
;
conditional_and_expression:
inclusive_or_expression
| conditional_and_expression BOOL_AND_TK inclusive_or_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| conditional_and_expression BOOL_AND_TK error
{yyerror ("Missing term"); RECOVER;}
;
conditional_or_expression:
conditional_and_expression
| conditional_or_expression BOOL_OR_TK conditional_and_expression
{
$$ = build_binop (BINOP_LOOKUP ($2.token), $2.location,
$1, $3);
}
| conditional_or_expression BOOL_OR_TK error
{yyerror ("Missing term"); RECOVER;}
;
conditional_expression: /* Error handling here is weak */
conditional_or_expression
| conditional_or_expression REL_QM_TK expression REL_CL_TK conditional_expression
{
$$ = build (CONDITIONAL_EXPR, NULL_TREE, $1, $3, $5);
EXPR_WFL_LINECOL ($$) = $2.location;
}
| conditional_or_expression REL_QM_TK REL_CL_TK error
{
YYERROR_NOW;
yyerror ("Missing term");
DRECOVER (1);
}
| conditional_or_expression REL_QM_TK error
{yyerror ("Missing term"); DRECOVER (2);}
| conditional_or_expression REL_QM_TK expression REL_CL_TK error
{yyerror ("Missing term"); DRECOVER (3);}
;
assignment_expression:
conditional_expression
| assignment
;
assignment:
left_hand_side assignment_operator assignment_expression
{ $$ = build_assignment ($2.token, $2.location, $1, $3); }
| left_hand_side assignment_operator error
{
if (ctxp->prevent_ese != lineno)
yyerror ("Missing term");
DRECOVER (assign);
}
;
left_hand_side:
name
| field_access
| array_access
;
assignment_operator:
ASSIGN_ANY_TK
| ASSIGN_TK
;
expression:
assignment_expression
;
constant_expression:
expression
;
%%
/* Flag for the error report routine to issue the error the first time
it's called (overriding the default behavior which is to drop the
first invocation and honor the second one, taking advantage of a
richer context. */
static int force_error = 0;
/* Create a new parser context and make it the current one. */
void
java_push_parser_context ()
{
struct parser_ctxt *new =
(struct parser_ctxt *)xmalloc(sizeof (struct parser_ctxt));
bzero ((PTR) new, sizeof (struct parser_ctxt));
new->next = ctxp;
ctxp = new;
if (ctxp->next)
{
ctxp->incomplete_class = ctxp->next->incomplete_class;
ctxp->gclass_list = ctxp->next->gclass_list;
}
}
/* If the first file of a file list was a class file, no context
exists for a source file to be parsed. This boolean remembers that
java_parser_context_save_global might have created a dummy one, so
that java_parser_context_restore_global can pop it. */
static int extra_ctxp_pushed_p = 0;
void
java_parser_context_save_global ()
{
if (!ctxp)
{
java_push_parser_context ();
extra_ctxp_pushed_p = 1;
}
ctxp->finput = finput;
ctxp->lineno = lineno;
ctxp->current_class = current_class;
ctxp->filename = input_filename;
ctxp->current_function_decl = current_function_decl;
}
void
java_parser_context_restore_global ()
{
finput = ctxp->finput;
lineno = ctxp->lineno;
current_class = ctxp->current_class;
input_filename = ctxp->filename;
current_function_decl = ctxp->current_function_decl;
if (!ctxp->next && extra_ctxp_pushed_p)
{
java_pop_parser_context (0);
extra_ctxp_pushed_p = 0;
}
}
void
java_pop_parser_context (generate)
int generate;
{
tree current;
struct parser_ctxt *toFree, *next;
if (!ctxp)
return;
toFree = ctxp;
next = ctxp->next;
if (next)
{
next->incomplete_class = ctxp->incomplete_class;
next->gclass_list = ctxp->gclass_list;
lineno = ctxp->lineno;
finput = ctxp->finput;
current_class = ctxp->current_class;
}
/* Set the single import class file flag to 0 for the current list
of imported things */
for (current = ctxp->import_list; current; current = TREE_CHAIN (current))
IS_A_SINGLE_IMPORT_CLASSFILE_NAME_P (TREE_PURPOSE (current)) = 0;
/* And restore those of the previous context */
if ((ctxp = next)) /* Assignment is really meant here */
for (current = ctxp->import_list; current; current = TREE_CHAIN (current))
IS_A_SINGLE_IMPORT_CLASSFILE_NAME_P (TREE_PURPOSE (current)) = 1;
if (generate)
{
toFree->next = ctxp_for_generation;
ctxp_for_generation = toFree;
}
else
free (toFree);
}
/* Reporting JDK1.1 features not implemented */
static tree
parse_jdk1_1_error (msg)
char *msg;
{
sorry (": `%s' JDK1.1(TM) feature", msg);
java_error_count++;
return empty_stmt_node;
}
static int do_warning = 0;
void
yyerror (msg)
char *msg;
{
static java_lc elc;
static int prev_lineno;
static char *prev_msg;
int save_lineno;
char *remainder, *code_from_source;
extern struct obstack temporary_obstack;
if (!force_error && prev_lineno == lineno)
return;
/* Save current error location but report latter, when the context is
richer. */
if (ctxp->java_error_flag == 0)
{
ctxp->java_error_flag = 1;
elc = ctxp->elc;
/* Do something to use the previous line if we're reaching the
end of the file... */
#ifdef VERBOSE_SKELETON
printf ("* Error detected (%s)\n", (msg ? msg : "(null)"));
#endif
return;
}
/* Ignore duplicate message on the same line. BTW, this is dubious. FIXME */
if (!force_error && msg == prev_msg && prev_lineno == elc.line)
return;
ctxp->java_error_flag = 0;
if (do_warning)
java_warning_count++;
else
java_error_count++;
if (elc.col == 0 && msg[1] == ';')
{
elc.col = ctxp->p_line->char_col-1;
elc.line = ctxp->p_line->lineno;
}
save_lineno = lineno;
prev_lineno = lineno = elc.line;
prev_msg = msg;
code_from_source = java_get_line_col (ctxp->filename, elc.line, elc.col);
obstack_grow0 (&temporary_obstack,
code_from_source, strlen (code_from_source));
remainder = obstack_finish (&temporary_obstack);
if (do_warning)
warning ("%s.\n%s", msg, remainder);
else
error ("%s.\n%s", msg, remainder);
/* This allow us to cheaply avoid an extra 'Invalid expression
statement' error report when errors have been already reported on
the same line. This occurs when we report an error but don't have
a synchronization point other than ';', which
expression_statement is the only one to take care of. */
ctxp->prevent_ese = lineno = save_lineno;
}
static void
issue_warning_error_from_context (cl, msg, ap)
tree cl;
const char *msg;
va_list ap;
{
char *saved, *saved_input_filename;
char buffer [4096];
vsprintf (buffer, msg, ap);
force_error = 1;
ctxp->elc.line = EXPR_WFL_LINENO (cl);
ctxp->elc.col = (EXPR_WFL_COLNO (cl) == 0xfff ? -1 :
(EXPR_WFL_COLNO (cl) == 0xffe ? -2 : EXPR_WFL_COLNO (cl)));
/* We have a CL, that's a good reason for using it if it contains data */
saved = ctxp->filename;
if (TREE_CODE (cl) == EXPR_WITH_FILE_LOCATION && EXPR_WFL_FILENAME_NODE (cl))
ctxp->filename = EXPR_WFL_FILENAME (cl);
saved_input_filename = input_filename;
input_filename = ctxp->filename;
java_error (NULL);
java_error (buffer);
ctxp->filename = saved;
input_filename = saved_input_filename;
force_error = 0;
}
/* Issue an error message at a current source line CL */
void
parse_error_context VPROTO ((tree cl, const char *msg, ...))
{
#ifndef ANSI_PROTOTYPES
tree cl;
const char *msg;
#endif
va_list ap;
VA_START (ap, msg);
#ifndef ANSI_PROTOTYPES
cl = va_arg (ap, tree);
msg = va_arg (ap, const char *);
#endif
issue_warning_error_from_context (cl, msg, ap);
va_end (ap);
}
/* Issue a warning at a current source line CL */
static void
parse_warning_context VPROTO ((tree cl, const char *msg, ...))
{
#ifndef ANSI_PROTOTYPES
tree cl;
const char *msg;
#endif
va_list ap;
VA_START (ap, msg);
#ifndef ANSI_PROTOTYPES
cl = va_arg (ap, tree);
msg = va_arg (ap, const char *);
#endif
force_error = do_warning = 1;
issue_warning_error_from_context (cl, msg, ap);
do_warning = force_error = 0;
va_end (ap);
}
static tree
find_expr_with_wfl (node)
tree node;
{
while (node)
{
char code;
tree to_return;
switch (TREE_CODE (node))
{
case BLOCK:
node = BLOCK_EXPR_BODY (node);
continue;
case COMPOUND_EXPR:
to_return = find_expr_with_wfl (TREE_OPERAND (node, 0));
if (to_return)
return to_return;
node = TREE_OPERAND (node, 1);
continue;
case LOOP_EXPR:
node = TREE_OPERAND (node, 0);
continue;
case LABELED_BLOCK_EXPR:
node = TREE_OPERAND (node, 1);
continue;
default:
code = TREE_CODE_CLASS (TREE_CODE (node));
if (((code == '1') || (code == '2') || (code == 'e'))
&& EXPR_WFL_LINECOL (node))
return node;
return NULL_TREE;
}
}
return NULL_TREE;
}
/* Issue a missing return statement error. Uses METHOD to figure the
last line of the method the error occurs in. */
static void
missing_return_error (method)
tree method;
{
EXPR_WFL_SET_LINECOL (wfl_operator, DECL_SOURCE_LINE_LAST (method), -2);
parse_error_context (wfl_operator, "Missing return statement");
}
/* Issue an unreachable statement error. From NODE, find the next
statement to report appropriately. */
static void
unreachable_stmt_error (node)
tree node;
{
/* Browse node to find the next expression node that has a WFL. Use
the location to report the error */
if (TREE_CODE (node) == COMPOUND_EXPR)
node = find_expr_with_wfl (TREE_OPERAND (node, 1));
else
node = find_expr_with_wfl (node);
if (node)
{
EXPR_WFL_SET_LINECOL (wfl_operator, EXPR_WFL_LINENO (node), -2);
parse_error_context (wfl_operator, "Unreachable statement");
}
else
fatal ("Can't get valid statement - unreachable_stmt_error");
}
int
java_report_errors ()
{
if (java_error_count)
fprintf (stderr, "%d error%s",
java_error_count, (java_error_count == 1 ? "" : "s"));
if (java_warning_count)
fprintf (stderr, "%s%d warning%s", (java_error_count ? ", " : ""),
java_warning_count, (java_warning_count == 1 ? "" : "s"));
if (java_error_count || java_warning_count)
putc ('\n', stderr);
return java_error_count;
}
static char *
java_accstring_lookup (flags)
int flags;
{
static char buffer [80];
#define COPY_RETURN(S) {strcpy (buffer, S); return buffer;}
/* Access modifier looked-up first for easier report on forbidden
access. */
if (flags & ACC_PUBLIC) COPY_RETURN ("public");
if (flags & ACC_PRIVATE) COPY_RETURN ("private");
if (flags & ACC_PROTECTED) COPY_RETURN ("protected");
if (flags & ACC_STATIC) COPY_RETURN ("static");
if (flags & ACC_FINAL) COPY_RETURN ("final");
if (flags & ACC_SYNCHRONIZED) COPY_RETURN ("synchronized");
if (flags & ACC_VOLATILE) COPY_RETURN ("volatile");
if (flags & ACC_TRANSIENT) COPY_RETURN ("transient");
if (flags & ACC_NATIVE) COPY_RETURN ("native");
if (flags & ACC_INTERFACE) COPY_RETURN ("interface");
if (flags & ACC_ABSTRACT) COPY_RETURN ("abstract");
buffer [0] = '\0';
return buffer;
#undef COPY_RETURN
}
/* Issuing error messages upon redefinition of classes, interfaces or
variables. */
static void
classitf_redefinition_error (context, id, decl, cl)
char *context;
tree id, decl, cl;
{
parse_error_context (cl, "%s `%s' already defined in %s:%d",
context, IDENTIFIER_POINTER (id),
DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
/* Here we should point out where its redefined. It's a unicode. FIXME */
}
static void
variable_redefinition_error (context, name, type, line)
tree context, name, type;
int line;
{
char *type_name;
/* Figure a proper name for type. We might haven't resolved it */
if (TREE_CODE (type) == POINTER_TYPE && !TREE_TYPE (type))
type_name = IDENTIFIER_POINTER (TYPE_NAME (type));
else
type_name = lang_printable_name (type, 0);
parse_error_context (context,
"Variable `%s' is already defined in this method and "
"was declared `%s %s' at line %d",
IDENTIFIER_POINTER (name),
type_name, IDENTIFIER_POINTER (name), line);
}
static tree
build_array_from_name (type, type_wfl, name, ret_name)
tree type, type_wfl, name, *ret_name;
{
int more_dims = 0;
char *string;
/* Eventually get more dims */
string = IDENTIFIER_POINTER (name);
while (string [more_dims] == '[')
more_dims++;
/* If we have, then craft a new type for this variable */
if (more_dims)
{
name = get_identifier (&string [more_dims]);
/* If we have a pointer, use its type */
if (TREE_CODE (type) == POINTER_TYPE)
type = TREE_TYPE (type);
/* Building the first dimension of a primitive type uses this
function */
if (JPRIMITIVE_TYPE_P (type))
{
type = build_java_array_type (type, -1);
CLASS_LOADED_P (type) = 1;
more_dims--;
}
/* Otherwise, if we have a WFL for this type, use it (the type
is already an array on an unresolved type, and we just keep
on adding dimensions) */
else if (type_wfl)
type = type_wfl;
/* Add all the dimensions */
while (more_dims--)
type = build_unresolved_array_type (type);
/* The type may have been incomplete in the first place */
if (type_wfl)
type = obtain_incomplete_type (type);
}
*ret_name = name;
return type;
}
/* Build something that the type identifier resolver will identify as
being an array to an unresolved type. TYPE_WFL is a WFL on a
identifier. */
static tree
build_unresolved_array_type (type_or_wfl)
tree type_or_wfl;
{
char *ptr;
/* TYPE_OR_WFL might be an array on a resolved type. In this case,
just create a array type */
if (TREE_CODE (type_or_wfl) == RECORD_TYPE)
{
tree type = build_java_array_type (type_or_wfl, -1);
CLASS_LOADED_P (type) = CLASS_LOADED_P (type_or_wfl);
return type;
}
obstack_1grow (&temporary_obstack, '[');
obstack_grow0 (&temporary_obstack,
IDENTIFIER_POINTER (EXPR_WFL_NODE (type_or_wfl)),
IDENTIFIER_LENGTH (EXPR_WFL_NODE (type_or_wfl)));
ptr = obstack_finish (&temporary_obstack);
return build_expr_wfl (get_identifier (ptr),
EXPR_WFL_FILENAME (type_or_wfl),
EXPR_WFL_LINENO (type_or_wfl),
EXPR_WFL_COLNO (type_or_wfl));
}
/* Check modifiers. If one doesn't fit, retrieve it in its declaration line
and point it out. */
static void
check_modifiers (message, value, mask)
char *message;
int value;
int mask;
{
/* Should point out the one that don't fit. ASCII/unicode,
going backward. FIXME */
if (value & ~mask)
{
int i, remainder = value & ~mask;
for (i = 0; i <= 10; i++)
if ((1 << i) & remainder)
parse_error_context (ctxp->modifier_ctx [i], message,
java_accstring_lookup (1 << i));
}
}
static void
parser_add_interface (class_decl, interface_decl, wfl)
tree class_decl, interface_decl, wfl;
{
if (maybe_add_interface (TREE_TYPE (class_decl), TREE_TYPE (interface_decl)))
parse_error_context (wfl, "Interface `%s' repeated",
IDENTIFIER_POINTER (DECL_NAME (interface_decl)));
}
/* Bulk of common class/interface checks. Return 1 if an error was
encountered. TAG is 0 for a class, 1 for an interface. */
static int
check_class_interface_creation (is_interface, flags, raw_name, qualified_name, decl, cl)
int is_interface, flags;
tree raw_name, qualified_name, decl, cl;
{
tree node;
if (!quiet_flag)
fprintf (stderr, " %s %s", (is_interface ? "interface" : "class"),
IDENTIFIER_POINTER (qualified_name));
/* Scope of an interface/class type name:
- Can't be imported by a single type import
- Can't already exists in the package */
if (IS_A_SINGLE_IMPORT_CLASSFILE_NAME_P (raw_name)
&& (node = find_name_in_single_imports (raw_name)))
{
parse_error_context
(cl, "%s name `%s' clashes with imported type `%s'",
(is_interface ? "Interface" : "Class"),
IDENTIFIER_POINTER (raw_name), IDENTIFIER_POINTER (node));
return 1;
}
if (decl && CLASS_COMPLETE_P (decl))
{
classitf_redefinition_error ((is_interface ? "Interface" : "Class"),
qualified_name, decl, cl);
return 1;
}
/* If public, file name should match class/interface name */
if (flags & ACC_PUBLIC)
{
char *f;
/* Contains OS dependent assumption on path separator. FIXME */
for (f = &input_filename [strlen (input_filename)];
f != input_filename && f[0] != '/' && f[0] != DIR_SEPARATOR;
f--)
;
if (f[0] == '/' || f[0] == DIR_SEPARATOR)
f++;
if (strncmp (IDENTIFIER_POINTER (raw_name),
f , IDENTIFIER_LENGTH (raw_name)) ||
f [IDENTIFIER_LENGTH (raw_name)] != '.')
parse_error_context (cl, "Public %s `%s' must be defined in a file "
"called `%s.java'",
(is_interface ? "interface" : "class"),
IDENTIFIER_POINTER (qualified_name),
IDENTIFIER_POINTER (raw_name));
}
check_modifiers ((is_interface ?
"Illegal modifier `%s' for interface declaration" :
"Illegal modifier `%s' for class declaration"), flags,
(is_interface ? INTERFACE_MODIFIERS : CLASS_MODIFIERS));
return 0;
}
/* If DECL is NULL, create and push a new DECL, record the current
line CL and do other maintenance things. */
static tree
maybe_create_class_interface_decl (decl, qualified_name, cl)
tree decl, qualified_name, cl;
{
if (!decl)
decl = push_class (make_class (), qualified_name);
/* Take care of the file and line business */
DECL_SOURCE_FILE (decl) = EXPR_WFL_FILENAME (cl);
/* If we're emiting xrefs, store the line/col number information */
if (flag_emit_xref)
DECL_SOURCE_LINE (decl) = EXPR_WFL_LINECOL (cl);
else
DECL_SOURCE_LINE (decl) = EXPR_WFL_LINENO (cl);
CLASS_FROM_SOURCE_P (TREE_TYPE (decl)) = 1;
CLASS_FROM_CURRENTLY_COMPILED_SOURCE_P (TREE_TYPE (decl)) =
IS_A_COMMAND_LINE_FILENAME_P (EXPR_WFL_FILENAME_NODE (cl));
ctxp->current_parsed_class = decl;
/* Link the declaration to the already seen ones */
TREE_CHAIN (decl) = ctxp->class_list;
ctxp->class_list = decl;
/* Create a new nodes in the global lists */
ctxp->gclass_list = tree_cons (NULL_TREE, decl, ctxp->gclass_list);
all_class_list = tree_cons (NULL_TREE, decl, all_class_list);
/* Install a new dependency list element */
create_jdep_list (ctxp);
SOURCE_FRONTEND_DEBUG (("Defining class/interface %s",
IDENTIFIER_POINTER (qualified_name)));
return decl;
}
static void
add_superinterfaces (decl, interface_list)
tree decl, interface_list;
{
tree node;
/* Superinterface(s): if present and defined, parser_check_super_interface ()
takes care of ensuring that:
- This is an accessible interface type,
- Circularity detection.
parser_add_interface is then called. If present but not defined,
the check operation is delayed until the super interface gets
defined. */
for (node = interface_list; node; node = TREE_CHAIN (node))
{
tree current = TREE_PURPOSE (node);
tree idecl = IDENTIFIER_CLASS_VALUE (EXPR_WFL_NODE (current));
if (idecl && CLASS_LOADED_P (TREE_TYPE (idecl)))
{
if (!parser_check_super_interface (idecl, decl, current))
parser_add_interface (decl, idecl, current);
}
else
register_incomplete_type (JDEP_INTERFACE,
current, decl, NULL_TREE);
}
}
/* Create an interface in pass1 and return its decl. Return the
interface's decl in pass 2. */
static tree
create_interface (flags, id, super)
int flags;
tree id, super;
{
tree raw_name = EXPR_WFL_NODE (id);
tree q_name = parser_qualified_classname (id);
tree decl = IDENTIFIER_CLASS_VALUE (q_name);
EXPR_WFL_NODE (id) = q_name; /* Keep source location, even if refined. */
/* Basic checks: scope, redefinition, modifiers */
if (check_class_interface_creation (1, flags, raw_name, q_name, decl, id))
return NULL_TREE;
/* Interface modifiers check
- public/abstract allowed (already done at that point)
- abstract is obsolete (comes first, it's a warning, or should be)
- Can't use twice the same (checked in the modifier rule) */
if ((flags & ACC_ABSTRACT) && flag_redundant)
parse_warning_context
(MODIFIER_WFL (ABSTRACT_TK),
"Redundant use of `abstract' modifier. Interface `%s' is implicitely "
"abstract", IDENTIFIER_POINTER (raw_name));
/* Create a new decl if DECL is NULL, otherwise fix it */
decl = maybe_create_class_interface_decl (decl, q_name, id);
/* Set super info and mark the class a complete */
set_super_info (ACC_INTERFACE | flags, TREE_TYPE (decl),
object_type_node, ctxp->interface_number);
ctxp->interface_number = 0;
CLASS_COMPLETE_P (decl) = 1;
add_superinterfaces (decl, super);
return decl;
}
/* Create an class in pass1 and return its decl. Return class
interface's decl in pass 2. */
static tree
create_class (flags, id, super, interfaces)
int flags;
tree id, super, interfaces;
{
tree raw_name = EXPR_WFL_NODE (id);
tree class_id, decl;
tree super_decl_type;
class_id = parser_qualified_classname (id);
decl = IDENTIFIER_CLASS_VALUE (class_id);
ctxp->current_parsed_class_un = EXPR_WFL_NODE (id);
EXPR_WFL_NODE (id) = class_id;
/* Basic check: scope, redefinition, modifiers */
if (check_class_interface_creation (0, flags, raw_name, class_id, decl, id))
return NULL_TREE;
/* Class modifier check:
- Allowed modifier (already done at that point)
- abstract AND final forbidden
- Public classes defined in the correct file */
if ((flags & ACC_ABSTRACT) && (flags & ACC_FINAL))
parse_error_context (id, "Class `%s' can't be declared both abstract "
"and final", IDENTIFIER_POINTER (raw_name));
/* Create a new decl if DECL is NULL, otherwise fix it */
decl = maybe_create_class_interface_decl (decl, class_id, id);
/* If SUPER exists, use it, otherwise use Object */
if (super)
{
/* Can't extend java.lang.Object */
if (TREE_TYPE (IDENTIFIER_CLASS_VALUE (class_id)) == object_type_node)
{
parse_error_context (id, "Can't extend `java.lang.Object'");
return NULL_TREE;
}
super_decl_type =
register_incomplete_type (JDEP_SUPER, super, decl, NULL_TREE);
}
else if (TREE_TYPE (decl) != object_type_node)
super_decl_type = object_type_node;
/* We're defining java.lang.Object */
else
super_decl_type = NULL_TREE;
/* Set super info and mark the class a complete */
set_super_info (flags, TREE_TYPE (decl), super_decl_type,
ctxp->interface_number);
ctxp->interface_number = 0;
CLASS_COMPLETE_P (decl) = 1;
add_superinterfaces (decl, interfaces);
/* If doing xref, store the location at which the inherited class
(if any) was seen. */
if (flag_emit_xref && super)
DECL_INHERITED_SOURCE_LINE (decl) = EXPR_WFL_LINECOL (super);
/* Eventually sets the @deprecated tag flag */
CHECK_DEPRECATED (decl);
return decl;
}
/* Can't use lookup_field () since we don't want to load the class and
can't set the CLASS_LOADED_P flag */
static tree
find_field (class, name)
tree class;
tree name;
{
tree decl;
for (decl = TYPE_FIELDS (class); decl; decl = TREE_CHAIN (decl))
{
if (DECL_NAME (decl) == name)
return decl;
}
return NULL_TREE;
}
/* Wrap around lookup_field that doesn't potentially upset the value
of CLASS */
static tree
lookup_field_wrapper (class, name)
tree class, name;
{
tree type = class;
tree decl;
java_parser_context_save_global ();
decl = lookup_field (&type, name);
java_parser_context_restore_global ();
return decl == error_mark_node ? NULL : decl;
}
/* Find duplicate field within the same class declarations and report
the error. Returns 1 if a duplicated field was found, 0
otherwise. */
static int
duplicate_declaration_error_p (new_field_name, new_type, cl)
tree new_field_name, new_type, cl;
{
/* This might be modified to work with method decl as well */
tree decl = find_field (TREE_TYPE (ctxp->current_parsed_class),
new_field_name);
if (decl)
{
char *t1 = strdup (purify_type_name
((TREE_CODE (new_type) == POINTER_TYPE
&& TREE_TYPE (new_type) == NULL_TREE) ?
IDENTIFIER_POINTER (TYPE_NAME (new_type)) :
lang_printable_name (new_type, 1)));
/* The type may not have been completed by the time we report
the error */
char *t2 = strdup (purify_type_name
((TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE
&& TREE_TYPE (TREE_TYPE (decl)) == NULL_TREE) ?
IDENTIFIER_POINTER (TYPE_NAME (TREE_TYPE (decl))) :
lang_printable_name (TREE_TYPE (decl), 1)));
parse_error_context
(cl , "Duplicate variable declaration: `%s %s' was `%s %s' (%s:%d)",
t1, IDENTIFIER_POINTER (new_field_name),
t2, IDENTIFIER_POINTER (DECL_NAME (decl)),
DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
free (t1);
free (t2);
return 1;
}
return 0;
}
/* Field registration routine. If TYPE doesn't exist, field
declarations are linked to the undefined TYPE dependency list, to
be later resolved in java_complete_class () */
static void
register_fields (flags, type, variable_list)
int flags;
tree type, variable_list;
{
tree current, saved_type;
tree class_type = TREE_TYPE (ctxp->current_parsed_class);
int saved_lineno = lineno;
int must_chain = 0;
tree wfl = NULL_TREE;
/* If we're adding fields to interfaces, those fields are public,
static, final */
if (CLASS_INTERFACE (TYPE_NAME (class_type)))
{
OBSOLETE_MODIFIER_WARNING (MODIFIER_WFL (PUBLIC_TK),
flags, ACC_PUBLIC,
"%s", "interface field(s)");
OBSOLETE_MODIFIER_WARNING (MODIFIER_WFL (STATIC_TK),
flags, ACC_STATIC,
"%s", "interface field(s)");
OBSOLETE_MODIFIER_WARNING (MODIFIER_WFL (FINAL_TK),
flags, ACC_FINAL, "%s", "interface field(s)");
check_modifiers ("Illegal interface member modifier `%s'", flags,
INTERFACE_FIELD_MODIFIERS);
flags |= (ACC_PUBLIC | ACC_STATIC | ACC_FINAL);
}
/* Obtain a suitable type for resolution, if necessary */
SET_TYPE_FOR_RESOLUTION (type, wfl, must_chain);
/* If TYPE is fully resolved and we don't have a reference, make one */
PROMOTE_RECORD_IF_COMPLETE (type, must_chain);
for (current = variable_list, saved_type = type; current;
current = TREE_CHAIN (current), type = saved_type)
{
tree real_type;
tree field_decl;
tree cl = TREE_PURPOSE (current);
tree init = TREE_VALUE (current);
tree current_name = EXPR_WFL_NODE (cl);
/* Process NAME, as it may specify extra dimension(s) for it */
type = build_array_from_name (type, wfl, current_name, &current_name);
/* Type adjustment. We may have just readjusted TYPE because
the variable specified more dimensions. Make sure we have
a reference if we can and don't have one already. Also
change the name if we have an init. */
if (type != saved_type)
{
PROMOTE_RECORD_IF_COMPLETE (type, must_chain);
if (init)
EXPR_WFL_NODE (TREE_OPERAND (init, 0)) = current_name;
}
real_type = GET_REAL_TYPE (type);
/* Check for redeclarations */
if (duplicate_declaration_error_p (current_name, real_type, cl))
continue;
/* Set lineno to the line the field was found and create a
declaration for it. Eventually sets the @deprecated tag flag. */
if (flag_emit_xref)
lineno = EXPR_WFL_LINECOL (cl);
else
lineno = EXPR_WFL_LINENO (cl);
field_decl = add_field (class_type, current_name, real_type, flags);
CHECK_DEPRECATED (field_decl);
/* Check if we must chain. */
if (must_chain)
register_incomplete_type (JDEP_FIELD, wfl, field_decl, type);
/* If we have an initialization value tied to the field */
if (init)
{
/* The field is declared static */
if (flags & ACC_STATIC)
{
/* We include the field and its initialization part into
a list used to generate <clinit>. After <clinit> is
walked, field initializations will be processed and
fields initialized with known constants will be taken
out of <clinit> and have their DECL_INITIAL set
appropriately. */
TREE_CHAIN (init) = ctxp->static_initialized;
ctxp->static_initialized = init;
if (TREE_OPERAND (init, 1)
&& TREE_CODE (TREE_OPERAND (init, 1)) == NEW_ARRAY_INIT)
TREE_STATIC (TREE_OPERAND (init, 1)) = 1;
}
/* A non-static field declared with an immediate initialization is
to be initialized in <init>, if any. This field is remembered
to be processed at the time of the generation of <init>. */
else
{
TREE_CHAIN (init) = ctxp->non_static_initialized;
ctxp->non_static_initialized = init;
}
MODIFY_EXPR_FROM_INITIALIZATION_P (init) = 1;
DECL_INITIAL (field_decl) = TREE_OPERAND (init, 1);
}
}
lineno = saved_lineno;
}
/* Generate the method $finit$ that initializes fields initialized
upon declaration. */
static void
maybe_generate_finit ()
{
tree mdecl, current;
if (!ctxp->non_static_initialized || java_error_count)
return;
mdecl = create_artificial_method (TREE_TYPE (ctxp->current_parsed_class),
ACC_PRIVATE, void_type_node,
finit_identifier_node, end_params_node);
start_artificial_method_body (mdecl);
ctxp->non_static_initialized = nreverse (ctxp->non_static_initialized);
for (current = ctxp->non_static_initialized; current;
current = TREE_CHAIN (current))
java_method_add_stmt (mdecl,
build_debugable_stmt (EXPR_WFL_LINECOL (current),
current));
end_artificial_method_body (mdecl);
CLASS_HAS_FINIT_P (TREE_TYPE (ctxp->current_parsed_class)) = 1;
ctxp->non_static_initialized = NULL_TREE;
}
/* Check whether it is necessary to generate a <clinit> for the class
we just parsed. */
static void
maybe_generate_clinit ()
{
tree mdecl, c;
if (!ctxp->static_initialized || java_error_count)
return;
mdecl = create_artificial_method (TREE_TYPE (ctxp->current_parsed_class),
ACC_STATIC, void_type_node,
clinit_identifier_node, end_params_node);
start_artificial_method_body (mdecl);
/* Keep initialization in order to enforce 8.5 */
ctxp->static_initialized = nreverse (ctxp->static_initialized);
/* We process the list of assignment we produced as the result of
the declaration of initialized static field and add them as
statement to the <clinit> method. */
for (c = ctxp->static_initialized; c; c = TREE_CHAIN (c))
{
/* We build the assignment expression that will initialize the
field to its value. There are strict rules on static
initializers (8.5). FIXME */
java_method_add_stmt (mdecl,
build_debugable_stmt (EXPR_WFL_LINECOL (c), c));
}
end_artificial_method_body (mdecl);
ctxp->static_initialized = NULL_TREE;
}
/* Shared accros method_declarator and method_header to remember the
patch stage that was reached during the declaration of the method.
A method DECL is built differently is there is no patch
(JDEP_NO_PATCH) or a patch (JDEP_METHOD or JDEP_METHOD_RETURN)
pending on the currently defined method. */
static int patch_stage;
/* Check the method declaration and add the method to its current
class. If the argument list is known to contain incomplete types,
the method is partially added and the registration will be resume
once the method arguments resolved. If TYPE is NULL, we're dealing
with a constructor. */
static tree
method_header (flags, type, mdecl, throws)
int flags;
tree type, mdecl, throws;
{
tree meth = TREE_VALUE (mdecl);
tree id = TREE_PURPOSE (mdecl);
tree this_class = TREE_TYPE (ctxp->current_parsed_class);
tree type_wfl = NULL_TREE;
tree meth_name = NULL_TREE, current, orig_arg;
int saved_lineno;
int constructor_ok = 0, must_chain;
check_modifiers_consistency (flags);
/* There are some forbidden modifiers for an abstract method and its
class must be abstract as well. */
if (type && (flags & ACC_ABSTRACT))
{
ABSTRACT_CHECK (flags, ACC_PRIVATE, id, "Private");
ABSTRACT_CHECK (flags, ACC_STATIC, id, "Static");
ABSTRACT_CHECK (flags, ACC_FINAL, id, "Final");
ABSTRACT_CHECK (flags, ACC_NATIVE, id, "Native");
ABSTRACT_CHECK (flags, ACC_SYNCHRONIZED,id, "Synchronized");
if (!CLASS_ABSTRACT (TYPE_NAME (this_class))
&& !CLASS_INTERFACE (TYPE_NAME (this_class)))
parse_error_context
(id, "Class `%s' must be declared abstract to define abstract "
"method `%s'",
IDENTIFIER_POINTER (DECL_NAME (ctxp->current_parsed_class)),
IDENTIFIER_POINTER (EXPR_WFL_NODE (id)));
}
/* Things to be checked when declaring a constructor */
if (!type)
{
int ec = java_error_count;
/* 8.6: Constructor declarations: we might be trying to define a
method without specifying a return type. */
if (EXPR_WFL_NODE (id) != ctxp->current_parsed_class_un)
parse_error_context
(id, "Invalid method declaration, return type required");
/* 8.6.3: Constructor modifiers */
else
{
JCONSTRUCTOR_CHECK (flags, ACC_ABSTRACT, id, "abstract");
JCONSTRUCTOR_CHECK (flags, ACC_STATIC, id, "static");
JCONSTRUCTOR_CHECK (flags, ACC_FINAL, id, "final");
JCONSTRUCTOR_CHECK (flags, ACC_NATIVE, id, "native");
JCONSTRUCTOR_CHECK (flags, ACC_SYNCHRONIZED, id, "synchronized");
}
/* If we found error here, we don't consider it's OK to tread
the method definition as a constructor, for the rest of this
function */
if (ec == java_error_count)
constructor_ok = 1;
}
/* Method declared within the scope of an interface are implicitly
abstract and public. Conflicts with other erroneously provided
modifiers are checked right after. */
if (CLASS_INTERFACE (TYPE_NAME (this_class)))
{
/* If FLAGS isn't set because of a modifier, turn the
corresponding modifier WFL to NULL so we issue a warning on
the obsolete use of the modifier */
if (!(flags & ACC_PUBLIC))
MODIFIER_WFL (PUBLIC_TK) = NULL;
if (!(flags & ACC_ABSTRACT))
MODIFIER_WFL (ABSTRACT_TK) = NULL;
flags |= ACC_PUBLIC;
flags |= ACC_ABSTRACT;
}
/* Modifiers context reset moved up, so abstract method declaration
modifiers can be later checked. */
/* Set constructor returned type to void and method name to <init>,
unless we found an error identifier the constructor (in which
case we retain the original name) */
if (!type)
{
type = void_type_node;
if (constructor_ok)
meth_name = init_identifier_node;
}
else
meth_name = EXPR_WFL_NODE (id);
/* Do the returned type resolution and registration if necessary */
SET_TYPE_FOR_RESOLUTION (type, type_wfl, must_chain);
if (meth_name)
type = build_array_from_name (type, type_wfl, meth_name, &meth_name);
EXPR_WFL_NODE (id) = meth_name;
PROMOTE_RECORD_IF_COMPLETE (type, must_chain);
if (must_chain)
{
patch_stage = JDEP_METHOD_RETURN;
register_incomplete_type (patch_stage, type_wfl, id, type);
TREE_TYPE (meth) = GET_REAL_TYPE (type);
}
else
TREE_TYPE (meth) = type;
saved_lineno = lineno;
/* When defining an abstract or interface method, the curly
bracket at level 1 doesn't exist because there is no function
body */
lineno = (ctxp->first_ccb_indent1 ? ctxp->first_ccb_indent1 :
EXPR_WFL_LINENO (id));
/* Remember the original argument list */
orig_arg = TYPE_ARG_TYPES (meth);
if (patch_stage) /* includes ret type and/or all args */
{
jdep *jdep;
meth = add_method_1 (this_class, flags, meth_name, meth);
/* Patch for the return type */
if (patch_stage == JDEP_METHOD_RETURN)
{
jdep = CLASSD_LAST (ctxp->classd_list);
JDEP_GET_PATCH (jdep) = &TREE_TYPE (TREE_TYPE (meth));
}
/* This is the stop JDEP. METH allows the function's signature
to be computed. */
register_incomplete_type (JDEP_METHOD_END, NULL_TREE, meth, NULL_TREE);
}
else
meth = add_method (this_class, flags, meth_name,
build_java_signature (meth));
/* Fix the method argument list so we have the argument name
information */
fix_method_argument_names (orig_arg, meth);
/* Register the parameter number and re-install the current line
number */
DECL_MAX_LOCALS (meth) = ctxp->formal_parameter_number+1;
lineno = saved_lineno;
/* Register exception specified by the `throws' keyword for
resolution and set the method decl appropriate field to the list.
Note: the grammar ensures that what we get here are class
types. */
if (throws)
{
throws = nreverse (throws);
for (current = throws; current; current = TREE_CHAIN (current))
{
register_incomplete_type (JDEP_EXCEPTION, TREE_VALUE (current),
NULL_TREE, NULL_TREE);
JDEP_GET_PATCH (CLASSD_LAST (ctxp->classd_list)) =
&TREE_VALUE (current);
}
DECL_FUNCTION_THROWS (meth) = throws;
}
/* We set the DECL_NAME to ID so we can track the location where
the function was declared. This allow us to report
redefinition error accurately. When method are verified,
DECL_NAME is reinstalled properly (using the content of the
WFL node ID) (see check_method_redefinition). We don't do that
when Object is being defined. Constructor <init> names will be
reinstalled the same way. */
if (TREE_TYPE (ctxp->current_parsed_class) != object_type_node)
DECL_NAME (meth) = id;
/* Set the flag if we correctly processed a constructor */
if (constructor_ok)
DECL_CONSTRUCTOR_P (meth) = 1;
/* Eventually set the @deprecated tag flag */
CHECK_DEPRECATED (meth);
/* If doing xref, store column and line number information instead
of the line number only. */
if (flag_emit_xref)
DECL_SOURCE_LINE (meth) = EXPR_WFL_LINECOL (id);
return meth;
}
static void
fix_method_argument_names (orig_arg, meth)
tree orig_arg, meth;
{
tree arg = TYPE_ARG_TYPES (TREE_TYPE (meth));
if (TREE_CODE (TREE_TYPE (meth)) == METHOD_TYPE)
{
TREE_PURPOSE (arg) = this_identifier_node;
arg = TREE_CHAIN (arg);
}
while (orig_arg != end_params_node)
{
TREE_PURPOSE (arg) = TREE_PURPOSE (orig_arg);
orig_arg = TREE_CHAIN (orig_arg);
arg = TREE_CHAIN (arg);
}
}
/* Complete the method declaration with METHOD_BODY. */
static void
finish_method_declaration (method_body)
tree method_body;
{
int flags = get_access_flags_from_decl (current_function_decl);
/* 8.4.5 Method Body */
if ((flags & ACC_ABSTRACT || flags & ACC_NATIVE) && method_body)
{
tree wfl = DECL_NAME (current_function_decl);
parse_error_context (wfl,
"%s method `%s' can't have a body defined",
(METHOD_NATIVE (current_function_decl) ?
"Native" : "Abstract"),
IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl)));
method_body = NULL_TREE;
}
else if (!(flags & ACC_ABSTRACT) && !(flags & ACC_NATIVE) && !method_body)
{
tree wfl = DECL_NAME (current_function_decl);
parse_error_context (wfl,
"Non native and non abstract method `%s' must "
"have a body defined",
IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl)));
method_body = NULL_TREE;
}
BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (current_function_decl)) = method_body;
maybe_absorb_scoping_blocks ();
/* Exit function's body */
exit_block ();
/* Merge last line of the function with first line, directly in the
function decl. It will be used to emit correct debug info. */
if (!flag_emit_xref)
DECL_SOURCE_LINE_MERGE (current_function_decl, ctxp->last_ccb_indent1);
/* So we don't have an irrelevant function declaration context for
the next static block we'll see. */
current_function_decl = NULL_TREE;
}
/* Build a an error message for constructor circularity errors. */
static char *
constructor_circularity_msg (from, to)
tree from, to;
{
static char string [4096];
char *t = strdup (lang_printable_name (from, 0));
sprintf (string, "`%s' invokes `%s'", t, lang_printable_name (to, 0));
free (t);
return string;
}
/* Verify a circular call to METH. Return 1 if an error is found, 0
otherwise. */
static int
verify_constructor_circularity (meth, current)
tree meth, current;
{
static tree list = NULL_TREE;
tree c;
for (c = DECL_CONSTRUCTOR_CALLS (current); c; c = TREE_CHAIN (c))
{
if (TREE_VALUE (c) == meth)
{
char *t;
if (list)
{
tree liste;
list = nreverse (list);
for (liste = list; liste; liste = TREE_CHAIN (liste))
{
parse_error_context
(TREE_PURPOSE (TREE_PURPOSE (liste)),
constructor_circularity_msg
(TREE_VALUE (liste), TREE_VALUE (TREE_PURPOSE (liste))));
java_error_count--;
}
}
t = strdup (lang_printable_name (meth, 0));
parse_error_context (TREE_PURPOSE (c),
"%s: recursive invocation of constructor `%s'",
constructor_circularity_msg (current, meth), t);
free (t);
list = NULL_TREE;
return 1;
}
}
for (c = DECL_CONSTRUCTOR_CALLS (current); c; c = TREE_CHAIN (c))
{
list = tree_cons (c, current, list);
if (verify_constructor_circularity (meth, TREE_VALUE (c)))
return 1;
list = TREE_CHAIN (list);
}
return 0;
}
/* Check modifiers that can be declared but exclusively */
static void
check_modifiers_consistency (flags)
int flags;
{
int acc_count = 0;
tree cl = NULL_TREE;
THIS_MODIFIER_ONLY (flags, ACC_PUBLIC, 0, acc_count, cl);
THIS_MODIFIER_ONLY (flags, ACC_PRIVATE, 1, acc_count, cl);
THIS_MODIFIER_ONLY (flags, ACC_PROTECTED, 2, acc_count, cl);
if (acc_count > 1)
parse_error_context
(cl, "Inconsistent member declaration. At most one of `public', "
"`private', or `protected' may be specified");
}
/* Check the methode header METH for abstract specifics features */
static void
check_abstract_method_header (meth)
tree meth;
{
int flags = get_access_flags_from_decl (meth);
/* DECL_NAME might still be a WFL node */
tree name = GET_METHOD_NAME (meth);
OBSOLETE_MODIFIER_WARNING (MODIFIER_WFL (ABSTRACT_TK), flags,
ACC_ABSTRACT, "abstract method `%s'",
IDENTIFIER_POINTER (name));
OBSOLETE_MODIFIER_WARNING (MODIFIER_WFL (PUBLIC_TK), flags,
ACC_PUBLIC, "abstract method `%s'",
IDENTIFIER_POINTER (name));
check_modifiers ("Illegal modifier `%s' for interface method",
flags, INTERFACE_METHOD_MODIFIERS);
}
/* Create a FUNCTION_TYPE node and start augmenting it with the
declared function arguments. Arguments type that can't be resolved
are left as they are, but the returned node is marked as containing
incomplete types. */
static tree
method_declarator (id, list)
tree id, list;
{
tree arg_types = NULL_TREE, current, node;
tree meth = make_node (FUNCTION_TYPE);
jdep *jdep;
patch_stage = JDEP_NO_PATCH;
for (current = list; current; current = TREE_CHAIN (current))
{
int must_chain = 0;
tree wfl_name = TREE_PURPOSE (current);
tree type = TREE_VALUE (current);
tree name = EXPR_WFL_NODE (wfl_name);
tree already, arg_node;
tree type_wfl = NULL_TREE;
tree real_type;
/* Obtain a suitable type for resolution, if necessary */
SET_TYPE_FOR_RESOLUTION (type, type_wfl, must_chain);
/* Process NAME, as it may specify extra dimension(s) for it */
type = build_array_from_name (type, type_wfl, name, &name);
EXPR_WFL_NODE (wfl_name) = name;
real_type = GET_REAL_TYPE (type);
if (TREE_CODE (real_type) == RECORD_TYPE)
{
real_type = promote_type (real_type);
if (TREE_CODE (type) == TREE_LIST)
TREE_PURPOSE (type) = real_type;
}
/* Check redefinition */
for (already = arg_types; already; already = TREE_CHAIN (already))
if (TREE_PURPOSE (already) == name)
{
parse_error_context
(wfl_name, "Variable `%s' is used more than once in the "
"argument list of method `%s'", IDENTIFIER_POINTER (name),
IDENTIFIER_POINTER (EXPR_WFL_NODE (id)));
break;
}
/* If we've an incomplete argument type, we know there is a location
to patch when the type get resolved, later. */
jdep = NULL;
if (must_chain)
{
patch_stage = JDEP_METHOD;
type = register_incomplete_type (patch_stage,
type_wfl, wfl_name, type);
jdep = CLASSD_LAST (ctxp->classd_list);
JDEP_MISC (jdep) = id;
}
/* The argument node: a name and a (possibly) incomplete type */
arg_node = build_tree_list (name, real_type);
if (jdep)
JDEP_GET_PATCH (jdep) = &TREE_VALUE (arg_node);
TREE_CHAIN (arg_node) = arg_types;
arg_types = arg_node;
}
TYPE_ARG_TYPES (meth) = chainon (nreverse (arg_types), end_params_node);
node = build_tree_list (id, meth);
return node;
}
static int
unresolved_type_p (wfl, returned)
tree wfl;
tree *returned;
{
if (TREE_CODE (wfl) == EXPR_WITH_FILE_LOCATION)
{
tree decl = IDENTIFIER_CLASS_VALUE (EXPR_WFL_NODE (wfl));
if (returned)
*returned = (decl ? TREE_TYPE (decl) : NULL_TREE);
return 1;
}
if (returned)
*returned = wfl;
return 0;
}
/* From NAME, build a qualified identifier node using the
qualification from the current package definition. */
static tree
parser_qualified_classname (name)
tree name;
{
if (ctxp->package)
return merge_qualified_name (ctxp->package, EXPR_WFL_NODE (name));
else
return EXPR_WFL_NODE (name);
}
/* Called once the type a interface extends is resolved. Returns 0 if
everything is OK. */
static int
parser_check_super_interface (super_decl, this_decl, this_wfl)
tree super_decl, this_decl, this_wfl;
{
tree super_type = TREE_TYPE (super_decl);
/* Has to be an interface */
if (!CLASS_INTERFACE (TYPE_NAME (TREE_TYPE (super_decl))))
{
parse_error_context
(this_wfl, "Can't use %s `%s' to implement/extend %s `%s'",
(TYPE_ARRAY_P (super_type) ? "array" : "class"),
IDENTIFIER_POINTER (DECL_NAME (super_decl)),
(CLASS_INTERFACE (TYPE_NAME (TREE_TYPE (this_decl))) ?
"interface" : "class"),
IDENTIFIER_POINTER (DECL_NAME (this_decl)));
return 1;
}
/* Check scope: same package OK, other package: OK if public */
if (check_pkg_class_access (DECL_NAME (super_decl), lookup_cl (this_decl)))
return 1;
SOURCE_FRONTEND_DEBUG (("Completing interface %s with %s",
IDENTIFIER_POINTER (DECL_NAME (this_decl)),
IDENTIFIER_POINTER (DECL_NAME (super_decl))));
return 0;
}
/* Makes sure that SUPER_DECL is suitable to extend THIS_DECL. Returns
0 if everthing is OK. */
static int
parser_check_super (super_decl, this_decl, wfl)
tree super_decl, this_decl, wfl;
{
tree super_type = TREE_TYPE (super_decl);
/* SUPER should be a CLASS (neither an array nor an interface) */
if (TYPE_ARRAY_P (super_type) || CLASS_INTERFACE (TYPE_NAME (super_type)))
{
parse_error_context
(wfl, "Class `%s' can't subclass %s `%s'",
IDENTIFIER_POINTER (DECL_NAME (this_decl)),
(CLASS_INTERFACE (TYPE_NAME (super_type)) ? "interface" : "array"),
IDENTIFIER_POINTER (DECL_NAME (super_decl)));
return 1;
}
if (CLASS_FINAL (TYPE_NAME (super_type)))
{
parse_error_context (wfl, "Can't subclass final classes: %s",
IDENTIFIER_POINTER (DECL_NAME (super_decl)));
return 1;
}
/* Check scope: same package OK, other package: OK if public */
if (check_pkg_class_access (DECL_NAME (super_decl), wfl))
return 1;
SOURCE_FRONTEND_DEBUG (("Completing class %s with %s",
IDENTIFIER_POINTER (DECL_NAME (this_decl)),
IDENTIFIER_POINTER (DECL_NAME (super_decl))));
return 0;
}
/* Create a new dependency list and link it (in a LIFO manner) to the
CTXP list of type dependency list. */
static void
create_jdep_list (ctxp)
struct parser_ctxt *ctxp;
{
jdeplist *new = (jdeplist *)xmalloc (sizeof (jdeplist));
new->first = new->last = NULL;
new->next = ctxp->classd_list;
ctxp->classd_list = new;
}
static jdeplist *
reverse_jdep_list (ctxp)
struct parser_ctxt *ctxp;
{
register jdeplist *prev = NULL, *current, *next;
for (current = ctxp->classd_list; current; current = next)
{
next = current->next;
current->next = prev;
prev = current;
}
return prev;
}
/* Create a fake pointer based on the ID stored in
TYPE_NAME. TYPE_NAME can be a WFL or a incomplete type asking to be
registered again. */
static tree
obtain_incomplete_type (type_name)
tree type_name;
{
tree ptr, name;
if (TREE_CODE (type_name) == EXPR_WITH_FILE_LOCATION)
name = EXPR_WFL_NODE (type_name);
else if (INCOMPLETE_TYPE_P (type_name))
name = TYPE_NAME (type_name);
else
fatal ("invalid type name - obtain_incomplete_type");
for (ptr = ctxp->incomplete_class; ptr; ptr = TREE_CHAIN (ptr))
if (TYPE_NAME (ptr) == name)
break;
if (!ptr)
{
push_obstacks (&permanent_obstack, &permanent_obstack);
BUILD_PTR_FROM_NAME (ptr, name);
layout_type (ptr);
pop_obstacks ();
TREE_CHAIN (ptr) = ctxp->incomplete_class;
ctxp->incomplete_class = ptr;
}
return ptr;
}
/* Register a incomplete type whose name is WFL. Reuse PTR if PTR is
non NULL instead of computing a new fake type based on WFL. The new
dependency is inserted in the current type dependency list, in FIFO
manner. */
static tree
register_incomplete_type (kind, wfl, decl, ptr)
int kind;
tree wfl, decl, ptr;
{
jdep *new = (jdep *)xmalloc (sizeof (jdep));
if (!ptr && kind != JDEP_METHOD_END) /* JDEP_METHOD_END is a mere marker */
ptr = obtain_incomplete_type (wfl);
JDEP_KIND (new) = kind;
JDEP_DECL (new) = decl;
JDEP_SOLV (new) = ptr;
JDEP_WFL (new) = wfl;
JDEP_CHAIN (new) = NULL;
JDEP_MISC (new) = NULL_TREE;
JDEP_GET_PATCH (new) = (tree *)NULL;
JDEP_INSERT (ctxp->classd_list, new);
return ptr;
}
void
java_check_circular_reference ()
{
tree current;
for (current = ctxp->class_list; current; current = TREE_CHAIN (current))
{
tree type = TREE_TYPE (current);
if (CLASS_INTERFACE (TYPE_NAME (type)))
{
/* Check all interfaces this class extends */
tree basetype_vec = TYPE_BINFO_BASETYPES (type);
int n, i;
if (!basetype_vec)
return;
n = TREE_VEC_LENGTH (basetype_vec);
for (i = 0; i < n; i++)
{
tree vec_elt = TREE_VEC_ELT (basetype_vec, i);
if (vec_elt && BINFO_TYPE (vec_elt) != object_type_node
&& interface_of_p (type, BINFO_TYPE (vec_elt)))
parse_error_context (lookup_cl (current),
"Cyclic interface inheritance");
}
}
else
if (inherits_from_p (CLASSTYPE_SUPER (type), type))
parse_error_context (lookup_cl (current),
"Cyclic class inheritance");
}
}
/* safe_layout_class just makes sure that we can load a class without
disrupting the current_class, input_file, lineno, etc, information
about the class processed currently. */
void
safe_layout_class (class)
tree class;
{
tree save_current_class = current_class;
char *save_input_filename = input_filename;
int save_lineno = lineno;
push_obstacks (&permanent_obstack, &permanent_obstack);
layout_class (class);
pop_obstacks ();
current_class = save_current_class;
input_filename = save_input_filename;
lineno = save_lineno;
CLASS_LOADED_P (class) = 1;
}
static tree
jdep_resolve_class (dep)
jdep *dep;
{
tree decl;
if (JDEP_RESOLVED_P (dep))
decl = JDEP_RESOLVED_DECL (dep);
else
{
decl = resolve_class (JDEP_TO_RESOLVE (dep),
JDEP_DECL (dep), JDEP_WFL (dep));
JDEP_RESOLVED (dep, decl);
}
if (!decl)
complete_class_report_errors (dep);
return decl;
}
/* Complete unsatisfied class declaration and their dependencies */
void
java_complete_class ()
{
tree cclass;
jdeplist *cclassd;
int error_found;
tree type;
push_obstacks (&permanent_obstack, &permanent_obstack);
/* Process imports and reverse the import on demand list */
process_imports ();
if (ctxp->import_demand_list)
ctxp->import_demand_list = nreverse (ctxp->import_demand_list);
/* Rever things so we have the right order */
ctxp->class_list = nreverse (ctxp->class_list);
ctxp->classd_list = reverse_jdep_list (ctxp);
for (cclassd = ctxp->classd_list, cclass = ctxp->class_list;
cclass && cclassd;
cclass = TREE_CHAIN (cclass), cclassd = CLASSD_CHAIN (cclassd))
{
jdep *dep;
for (dep = CLASSD_FIRST (cclassd); dep; dep = JDEP_CHAIN (dep))
{
tree decl;
if (!(decl = jdep_resolve_class (dep)))
continue;
/* Now it's time to patch */
switch (JDEP_KIND (dep))
{
case JDEP_SUPER:
/* Simply patch super */
if (parser_check_super (decl, JDEP_DECL (dep), JDEP_WFL (dep)))
continue;
BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO
(TREE_TYPE (JDEP_DECL (dep)))), 0)) = TREE_TYPE (decl);
break;
case JDEP_FIELD:
{
/* We do part of the job done in add_field */
tree field_decl = JDEP_DECL (dep);
tree field_type = TREE_TYPE (decl);
push_obstacks (&permanent_obstack, &permanent_obstack);
if (TREE_CODE (field_type) == RECORD_TYPE)
field_type = promote_type (field_type);
pop_obstacks ();
TREE_TYPE (field_decl) = field_type;
DECL_ALIGN (field_decl) = 0;
layout_decl (field_decl, 0);
SOURCE_FRONTEND_DEBUG
(("Completed field/var decl `%s' with `%s'",
IDENTIFIER_POINTER (DECL_NAME (field_decl)),
IDENTIFIER_POINTER (DECL_NAME (decl))));
break;
}
case JDEP_METHOD: /* We start patching a method */
case JDEP_METHOD_RETURN:
error_found = 0;
while (1)
{
if (decl)
{
type = TREE_TYPE(decl);
if (TREE_CODE (type) == RECORD_TYPE)
type = promote_type (type);
JDEP_APPLY_PATCH (dep, type);
SOURCE_FRONTEND_DEBUG
(((JDEP_KIND (dep) == JDEP_METHOD_RETURN ?
"Completing fct `%s' with ret type `%s'":
"Completing arg `%s' with type `%s'"),
IDENTIFIER_POINTER (EXPR_WFL_NODE
(JDEP_DECL_WFL (dep))),
IDENTIFIER_POINTER (DECL_NAME (decl))));
}
else
error_found = 1;
dep = JDEP_CHAIN (dep);
if (JDEP_KIND (dep) == JDEP_METHOD_END)
break;
else
decl = jdep_resolve_class (dep);
}
if (!error_found)
{
tree mdecl = JDEP_DECL (dep), signature;
push_obstacks (&permanent_obstack, &permanent_obstack);
/* Recompute and reset the signature */
signature = build_java_signature (TREE_TYPE (mdecl));
set_java_signature (TREE_TYPE (mdecl), signature);
pop_obstacks ();
}
else
continue;
break;
case JDEP_INTERFACE:
if (parser_check_super_interface (decl, JDEP_DECL (dep),
JDEP_WFL (dep)))
continue;
parser_add_interface (JDEP_DECL (dep), decl, JDEP_WFL (dep));
break;
case JDEP_PARM:
case JDEP_VARIABLE:
type = TREE_TYPE(decl);
if (TREE_CODE (type) == RECORD_TYPE)
type = promote_type (type);
JDEP_APPLY_PATCH (dep, type);
break;
case JDEP_TYPE:
JDEP_APPLY_PATCH (dep, TREE_TYPE (decl));
SOURCE_FRONTEND_DEBUG
(("Completing a random type dependency on a '%s' node",
tree_code_name [TREE_CODE (JDEP_DECL (dep))]));
break;
case JDEP_EXCEPTION:
JDEP_APPLY_PATCH (dep, TREE_TYPE (decl));
SOURCE_FRONTEND_DEBUG
(("Completing `%s' `throws' argument node",
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_WFL (dep)))));
break;
default:
fatal ("Can't handle patch code %d - java_complete_class",
JDEP_KIND (dep));
}
}
}
pop_obstacks ();
return;
}
/* Resolve class CLASS_TYPE. Handle the case of trying to resolve an
array. */
static tree
resolve_class (class_type, decl, cl)
tree class_type, decl, cl;
{
char *name = IDENTIFIER_POINTER (TYPE_NAME (class_type));
char *base = name;
tree resolved_type = TREE_TYPE (class_type);
tree resolved_type_decl;
if (resolved_type != NULL_TREE)
{
tree resolved_type_decl = TYPE_NAME (resolved_type);
if (resolved_type_decl == NULL_TREE
|| TREE_CODE (resolved_type_decl) == IDENTIFIER_NODE)
{
resolved_type_decl = build_decl (TYPE_DECL,
TYPE_NAME (class_type),
resolved_type);
}
return resolved_type_decl;
}
/* 1- Check to see if we have an array. If true, find what we really
want to resolve */
while (name[0] == '[')
name++;
if (base != name)
TYPE_NAME (class_type) = get_identifier (name);
/* 2- Resolve the bare type */
if (!(resolved_type_decl = do_resolve_class (class_type, decl, cl)))
return NULL_TREE;
resolved_type = TREE_TYPE (resolved_type_decl);
/* 3- If we have and array, reconstruct the array down to its nesting */
if (base != name)
{
while (base != name)
{
if (TREE_CODE (resolved_type) == RECORD_TYPE)
resolved_type = promote_type (resolved_type);
resolved_type = build_java_array_type (resolved_type, -1);
CLASS_LOADED_P (resolved_type) = 1;
name--;
}
/* Build a fake decl for this, since this is what is expected to
be returned. */
resolved_type_decl =
build_decl (TYPE_DECL, TYPE_NAME (resolved_type), resolved_type);
/* Figure how those two things are important for error report. FIXME */
DECL_SOURCE_LINE (resolved_type_decl) = 0;
DECL_SOURCE_FILE (resolved_type_decl) = input_filename;
TYPE_NAME (class_type) = TYPE_NAME (resolved_type);
}
TREE_TYPE (class_type) = resolved_type;
return resolved_type_decl;
}
/* Effectively perform the resolution of class CLASS_TYPE. DECL or CL
are used to report error messages. */
tree
do_resolve_class (class_type, decl, cl)
tree class_type;
tree decl;
tree cl;
{
tree new_class_decl;
tree original_name = NULL_TREE;
/* Do not try to replace TYPE_NAME (class_type) by a variable, since
its is changed by find_in_imports{_on_demand} */
/* 1- Check for the type in single imports */
if (find_in_imports (class_type))
return NULL_TREE;
/* 2- And check for the type in the current compilation unit. If it fails,
try with a name qualified with the package name if appropriate. */
if ((new_class_decl = IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type))))
{
if (!CLASS_LOADED_P (TREE_TYPE (new_class_decl)) &&
!CLASS_FROM_SOURCE_P (TREE_TYPE (new_class_decl)))
load_class (TYPE_NAME (class_type), 0);
return IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type));
}
original_name = TYPE_NAME (class_type);
if (!QUALIFIED_P (TYPE_NAME (class_type)) && ctxp->package)
TYPE_NAME (class_type) = merge_qualified_name (ctxp->package,
TYPE_NAME (class_type));
#if 1
if (!(new_class_decl = IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type))))
load_class (TYPE_NAME (class_type), 0);
if ((new_class_decl = IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type))))
{
if (!CLASS_LOADED_P (TREE_TYPE (new_class_decl)) &&
!CLASS_FROM_SOURCE_P (TREE_TYPE (new_class_decl)))
load_class (TYPE_NAME (class_type), 0);
return IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type));
}
#else
new_name = TYPE_NAME (class_type);
if ((new_class_decl = IDENTIFIER_CLASS_VALUE (new_name)) != NULL_TREE)
{
if (!CLASS_LOADED_P (TREE_TYPE (new_class_decl)) &&
!CLASS_FROM_SOURCE_P (TREE_TYPE (new_class_decl)))
load_class (new_name, 0);
return IDENTIFIER_CLASS_VALUE (new_name);
}
else
{
tree class = read_class (new_name);
if (class != NULL_TREE)
{
tree decl = IDENTIFIER_CLASS_VALUE (new_name);
if (decl == NULL_TREE)
decl = push_class (class, new_name);
return decl;
}
}
#endif
TYPE_NAME (class_type) = original_name;
/* 3- Check an other compilation unit that bears the name of type */
load_class (TYPE_NAME (class_type), 0);
if (check_pkg_class_access (TYPE_NAME (class_type),
(cl ? cl : lookup_cl (decl))))
return NULL_TREE;
if ((new_class_decl = IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type))))
return new_class_decl;
/* 4- Check the import on demands. Don't allow bar.baz to be
imported from foo.* */
if (!QUALIFIED_P (TYPE_NAME (class_type)))
if (find_in_imports_on_demand (class_type))
return NULL_TREE;
/* 5- Last call for a resolution */
return IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type));
}
/* Resolve NAME and lay it out (if not done and if not the current
parsed class). Return a decl node. This function is meant to be
called when type resolution is necessary during the walk pass. */
static tree
resolve_and_layout (something, cl)
tree something;
tree cl;
{
tree decl;
/* Don't do that on the current class */
if (something == current_class)
return TYPE_NAME (current_class);
/* Don't do anything for void and other primitive types */
if (JPRIMITIVE_TYPE_P (something) || something == void_type_node)
return NULL_TREE;
/* Pointer types can be reall pointer types or fake pointers. When
finding a real pointer, recheck for primitive types */
if (TREE_CODE (something) == POINTER_TYPE)
{
if (TREE_TYPE (something))
{
something = TREE_TYPE (something);
if (JPRIMITIVE_TYPE_P (something) || something == void_type_node)
return NULL_TREE;
}
else
something = TYPE_NAME (something);
}
/* Don't do anything for arrays of primitive types */
if (TREE_CODE (something) == RECORD_TYPE && TYPE_ARRAY_P (something)
&& JPRIMITIVE_TYPE_P (TYPE_ARRAY_ELEMENT (something)))
return NULL_TREE;
/* If something is not and IDENTIFIER_NODE, it can be a a TYPE_DECL
or a real TYPE */
if (TREE_CODE (something) != IDENTIFIER_NODE)
something = (TREE_CODE (TYPE_NAME (something)) == TYPE_DECL ?
DECL_NAME (TYPE_NAME (something)) : TYPE_NAME (something));
if (!(decl = resolve_no_layout (something, cl)))
return NULL_TREE;
/* Resolve and layout if necessary */
layout_class_methods (TREE_TYPE (decl));
if (CLASS_FROM_SOURCE_P (TREE_TYPE (decl)))
CHECK_METHODS (decl);
if (TREE_TYPE (decl) != current_class && !CLASS_LOADED_P (TREE_TYPE (decl)))
safe_layout_class (TREE_TYPE (decl));
return decl;
}
/* Resolve a class, returns its decl but doesn't perform any
layout. The current parsing context is saved and restored */
static tree
resolve_no_layout (name, cl)
tree name, cl;
{
tree ptr, decl;
BUILD_PTR_FROM_NAME (ptr, name);
java_parser_context_save_global ();
decl = resolve_class (ptr, NULL_TREE, cl);
java_parser_context_restore_global ();
return decl;
}
/* Called when reporting errors. Skip leader '[' in a complex array
type description that failed to be resolved. */
static char *
purify_type_name (name)
char *name;
{
while (*name && *name == '[')
name++;
return name;
}
/* The type CURRENT refers to can't be found. We print error messages. */
static void
complete_class_report_errors (dep)
jdep *dep;
{
char *name;
if (!JDEP_WFL (dep))
return;
name = IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_WFL (dep)));
switch (JDEP_KIND (dep))
{
case JDEP_SUPER:
parse_error_context
(JDEP_WFL (dep), "Superclass `%s' of class `%s' not found",
purify_type_name (name),
IDENTIFIER_POINTER (DECL_NAME (JDEP_DECL (dep))));
break;
case JDEP_FIELD:
parse_error_context
(JDEP_WFL (dep), "Type `%s' not found in declaration of field `%s'",
purify_type_name (name),
IDENTIFIER_POINTER (DECL_NAME (JDEP_DECL (dep))));
break;
case JDEP_METHOD: /* Covers arguments */
parse_error_context
(JDEP_WFL (dep), "Type `%s' not found in the declaration of the "
"argument `%s' of method `%s'",
purify_type_name (name),
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_DECL_WFL (dep))),
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_MISC (dep))));
break;
case JDEP_METHOD_RETURN: /* Covers return type */
parse_error_context
(JDEP_WFL (dep), "Type `%s' not found in the declaration of the "
"return type of method `%s'",
purify_type_name (name),
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_DECL_WFL (dep))));
break;
case JDEP_INTERFACE:
parse_error_context
(JDEP_WFL (dep), "Superinterface `%s' of %s `%s' not found",
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_WFL (dep))),
(CLASS_OR_INTERFACE (JDEP_DECL (dep), "class", "interface")),
IDENTIFIER_POINTER (DECL_NAME (JDEP_DECL (dep))));
break;
case JDEP_VARIABLE:
parse_error_context
(JDEP_WFL (dep), "Type `%s' not found in the declaration of the "
"local variable `%s'",
purify_type_name (IDENTIFIER_POINTER
(EXPR_WFL_NODE (JDEP_WFL (dep)))),
IDENTIFIER_POINTER (DECL_NAME (JDEP_DECL (dep))));
break;
case JDEP_EXCEPTION: /* As specified by `throws' */
parse_error_context
(JDEP_WFL (dep), "Class `%s' not found in `throws'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (JDEP_WFL (dep))));
break;
default:
/* Fix for -Wall. Just break doing nothing. The error will be
caught later */
break;
}
}
/* Check uninitialized final. */
void
java_check_final ()
{
}
/* Return a static string containing the DECL prototype string. If
DECL is a constructor, use the class name instead of the form
<init> */
static char *
get_printable_method_name (decl)
tree decl;
{
char *to_return;
tree name = NULL_TREE;
if (DECL_CONSTRUCTOR_P (decl))
{
name = DECL_NAME (decl);
DECL_NAME (decl) = DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)));
}
to_return = lang_printable_name (decl, 0);
if (DECL_CONSTRUCTOR_P (decl))
DECL_NAME (decl) = name;
return to_return;
}
/* Reinstall the proper DECL_NAME on METHOD. Return 0 if the method
nevertheless needs to be verfied, 1 otherwise. */
static int
reset_method_name (method)
tree method;
{
if (!IS_CLINIT (method) && DECL_NAME (method) != finit_identifier_node)
{
/* NAME is just the plain name when Object is being defined */
if (DECL_CONTEXT (method) != object_type_node)
DECL_NAME (method) = (DECL_CONSTRUCTOR_P (method) ?
init_identifier_node : GET_METHOD_NAME (method));
return 0;
}
else
return 1;
}
/* Return the name of METHOD_DECL, when DECL_NAME is a WFL */
tree
java_get_real_method_name (method_decl)
tree method_decl;
{
tree method_name = DECL_NAME (method_decl);
if (DECL_CONSTRUCTOR_P (method_decl))
return init_identifier_node;
/* Explain here why METHOD_DECL doesn't have the DECL_CONSTRUCTUR_P
and still can be a constructor. FIXME */
/* Don't confuse method only bearing the name of their class as
constructors */
else if (!CLASS_FROM_SOURCE_P (DECL_CONTEXT (method_decl))
&& ctxp
&& ctxp->current_parsed_class_un == EXPR_WFL_NODE (method_name)
&& get_access_flags_from_decl (method_decl) <= ACC_PROTECTED
&& TREE_TYPE (TREE_TYPE (method_decl)) == void_type_node)
return init_identifier_node;
else
return EXPR_WFL_NODE (method_name);
}
/* Track method being redefined inside the same class. As a side
effect, set DECL_NAME to an IDENTIFIER (prior entering this
function it's a FWL, so we can track errors more accurately */
static int
check_method_redefinition (class, method)
tree class, method;
{
tree redef, name;
tree cl = DECL_NAME (method);
tree sig = TYPE_ARGUMENT_SIGNATURE (TREE_TYPE (method));
/* decl name of artificial <clinit> and $finit$ doesn't need to be
fixed and checked */
/* Reset the method name before running the check. If it returns 1,
the method doesn't need to be verified with respect to method
redeclaration and we return 0 */
if (reset_method_name (method))
return 0;
name = DECL_NAME (method);
for (redef = TYPE_METHODS (class); redef; redef = TREE_CHAIN (redef))
{
if (redef == method)
break;
if (DECL_NAME (redef) == name
&& sig == TYPE_ARGUMENT_SIGNATURE (TREE_TYPE (redef)))
{
parse_error_context
(cl, "Duplicate %s declaration `%s'",
(DECL_CONSTRUCTOR_P (redef) ? "constructor" : "method"),
get_printable_method_name (redef));
return 1;
}
}
return 0;
}
/* Check all the methods of CLASS. Methods are first completed then
checked according to regular method existance rules.
If no constructor were encountered, then build its declaration. */
static void
java_check_regular_methods (class_decl)
tree class_decl;
{
int saw_constructor = 0;
tree method;
tree class = CLASS_TO_HANDLE_TYPE (TREE_TYPE (class_decl));
tree super_class = CLASSTYPE_SUPER (class);
tree saved_found_wfl = NULL_TREE, found = NULL_TREE;
tree mthrows;
/* It is not necessary to check methods defined in java.lang.Object */
if (class == object_type_node)
return;
if (!TYPE_NVIRTUALS (class))
TYPE_METHODS (class) = nreverse (TYPE_METHODS (class));
/* Should take interfaces into account. FIXME */
for (method = TYPE_METHODS (class); method; method = TREE_CHAIN (method))
{
tree sig;
tree method_wfl = DECL_NAME (method);
int aflags;
/* If we previously found something and its name was saved,
reinstall it now */
if (found && saved_found_wfl)
{
DECL_NAME (found) = saved_found_wfl;
saved_found_wfl = NULL_TREE;
}
/* Check for redefinitions */
if (check_method_redefinition (class, method))
continue;
/* If we see one constructor a mark so we don't generate the
default one. Also skip other verifications: constructors
can't be inherited hence hiden or overriden */
if (DECL_CONSTRUCTOR_P (method))
{
saw_constructor = 1;
continue;
}
/* We verify things thrown by the method. They must inherits from
java.lang.Throwable */
for (mthrows = DECL_FUNCTION_THROWS (method);
mthrows; mthrows = TREE_CHAIN (mthrows))
{
if (!inherits_from_p (TREE_VALUE (mthrows), throwable_type_node))
parse_error_context
(TREE_PURPOSE (mthrows), "Class `%s' in `throws' clause must be "
"a subclass of class `java.lang.Throwable'",
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (TREE_VALUE (mthrows)))));
}
sig = build_java_argument_signature (TREE_TYPE (method));
found = lookup_argument_method (super_class, DECL_NAME (method), sig);
/* Nothing overrides or it's a private method. */
if (!found)
continue;
if (METHOD_PRIVATE (found))
{
found = NULL_TREE;
continue;
}
/* If found wasn't verified, it's DECL_NAME won't be set properly.
We set it temporarily for the sake of the error report. */
saved_found_wfl = DECL_NAME (found);
reset_method_name (found);
/* Can't override a method with the same name and different return
types. */
if (TREE_TYPE (TREE_TYPE (found)) != TREE_TYPE (TREE_TYPE (method)))
{
char *t = strdup (lang_printable_name (TREE_TYPE (TREE_TYPE (found)),
0));
parse_error_context
(method_wfl,
"Method `%s' was defined with return type `%s' in class `%s'",
lang_printable_name (found, 0), t,
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
free (t);
}
aflags = get_access_flags_from_decl (found);
/* If the method has default, access in an other package, then
issue a warning that the current method doesn't override the
one that was found elsewhere. Do not issue this warning when
the match was found in java.lang.Object. */
if (DECL_CONTEXT (found) != object_type_node
&& ((aflags & 0x7) == 0)
&& !class_in_current_package (DECL_CONTEXT (found))
&& DECL_NAME (found) != clinit_identifier_node
&& flag_not_overriding)
{
parse_warning_context
(method_wfl, "Method `%s' in class `%s' does not "
"override the corresponding method in class `%s', which is "
"private to a different package",
lang_printable_name (found, 0),
IDENTIFIER_POINTER (DECL_NAME (class_decl)),
IDENTIFIER_POINTER (DECL_NAME
(TYPE_NAME (DECL_CONTEXT (found)))));
continue;
}
/* Can't override final. Can't override static. */
if (METHOD_FINAL (found) || METHOD_STATIC (found))
{
/* Static *can* override static */
if (METHOD_STATIC (found) && METHOD_STATIC (method))
continue;
parse_error_context
(method_wfl,
"%s methods can't be overriden. Method `%s' is %s in class `%s'",
(METHOD_FINAL (found) ? "Final" : "Static"),
lang_printable_name (found, 0),
(METHOD_FINAL (found) ? "final" : "static"),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
continue;
}
/* Static method can't override instance method. */
if (METHOD_STATIC (method))
{
parse_error_context
(method_wfl,
"Instance methods can't be overriden by a static method. Method "
"`%s' is an instance method in class `%s'",
lang_printable_name (found, 0),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
continue;
}
/* - Overriding/hiding public must be public
- Overriding/hiding protected must be protected or public
- If the overriden or hidden method has default (package)
access, then the overriding or hiding method must not be
private; otherwise, a compile-time error occurs */
if ((METHOD_PUBLIC (found) && !METHOD_PUBLIC (method))
|| (METHOD_PROTECTED (found)
&& !(METHOD_PUBLIC (method) || METHOD_PROTECTED (method)))
|| (!(aflags & (ACC_PUBLIC | ACC_PRIVATE | ACC_STATIC))
&& METHOD_PRIVATE (method)))
{
parse_error_context
(method_wfl,
"Methods can't be overridden to be more private. Method `%s' is "
"not %s in class `%s'", lang_printable_name (method, 0),
(METHOD_PUBLIC (method) ? "public" :
(METHOD_PRIVATE (method) ? "private" : "protected")),
IDENTIFIER_POINTER (DECL_NAME
(TYPE_NAME (DECL_CONTEXT (found)))));
continue;
}
/* Overriding methods must have compatible `throws' clauses on checked
exceptions, if any */
check_throws_clauses (method, method_wfl, found);
/* Inheriting multiple methods with the same signature. FIXME */
}
/* Don't forget eventual pending found and saved_found_wfl. Take
into account that we might have exited because we saw an
aritifical method as the last entry. */
if (found && !DECL_ARTIFICIAL (found) && saved_found_wfl)
DECL_NAME (found) = saved_found_wfl;
if (!TYPE_NVIRTUALS (class))
TYPE_METHODS (class) = nreverse (TYPE_METHODS (class));
if (!saw_constructor)
{
/* No constructor seen, we craft one, at line 0. Since this
operation takes place after we laid methods out
(layout_class_methods), we prepare the its DECL
appropriately. */
int flags;
tree decl;
/* If the class is declared PUBLIC, the default constructor is
PUBLIC otherwise it has default access implied by no access
modifiers. */
flags = (get_access_flags_from_decl (class_decl) & ACC_PUBLIC ?
ACC_PUBLIC : 0);
decl = create_artificial_method (class, flags, void_type_node,
init_identifier_node, end_params_node);
DECL_CONSTRUCTOR_P (decl) = 1;
layout_class_method (TREE_TYPE (class_decl), NULL_TREE, decl, NULL_TREE);
}
}
/* Return a non zero value if the `throws' clause of METHOD (if any)
is incompatible with the `throws' clause of FOUND (if any). */
static void
check_throws_clauses (method, method_wfl, found)
tree method, method_wfl, found;
{
tree mthrows, fthrows;
/* Can't check these things with class loaded from bytecode. FIXME */
if (!CLASS_FROM_SOURCE_P (DECL_CONTEXT (found)))
return;
for (mthrows = DECL_FUNCTION_THROWS (method);
mthrows; mthrows = TREE_CHAIN (mthrows))
{
/* We don't verify unchecked expressions */
if (IS_UNCHECKED_EXCEPTION_P (TREE_VALUE (mthrows)))
continue;
/* Checked expression must be compatible */
for (fthrows = DECL_FUNCTION_THROWS (found);
fthrows; fthrows = TREE_CHAIN (fthrows))
if (inherits_from_p (TREE_VALUE (mthrows), TREE_VALUE (fthrows)))
break;
if (!fthrows)
{
parse_error_context
(method_wfl, "Invalid checked exception class `%s' in "
"`throws' clause. The exception must be a subclass of an "
"exception thrown by `%s' from class `%s'",
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (TREE_VALUE (mthrows)))),
lang_printable_name (found, 0),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
}
}
}
/* Check abstract method of interface INTERFACE */
static void
java_check_abstract_methods (interface_decl)
tree interface_decl;
{
int i, n;
tree method, basetype_vec, found;
tree interface = TREE_TYPE (interface_decl);
for (method = TYPE_METHODS (interface); method; method = TREE_CHAIN (method))
{
tree method_wfl = DECL_NAME (method);
/* 2- Check for double definition inside the defining interface */
if (check_method_redefinition (interface, method))
continue;
/* 3- Overriding is OK as far as we preserve the return type and
the thrown exceptions (FIXME) */
found = lookup_java_interface_method2 (interface, method);
if (found)
{
char *t;
tree saved_found_wfl = DECL_NAME (found);
reset_method_name (found);
t = strdup (lang_printable_name (TREE_TYPE (TREE_TYPE (found)), 0));
parse_error_context
(method_wfl,
"Method `%s' was defined with return type `%s' in class `%s'",
lang_printable_name (found, 0), t,
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
free (t);
continue;
DECL_NAME (found) = saved_found_wfl;
}
}
/* 4- Inherited methods can't differ by their returned types */
if (!(basetype_vec = TYPE_BINFO_BASETYPES (interface)))
return;
n = TREE_VEC_LENGTH (basetype_vec);
for (i = 0; i < n; i++)
{
tree sub_interface_method, sub_interface;
tree vec_elt = TREE_VEC_ELT (basetype_vec, i);
if (!vec_elt)
continue;
sub_interface = BINFO_TYPE (vec_elt);
for (sub_interface_method = TYPE_METHODS (sub_interface);
sub_interface_method;
sub_interface_method = TREE_CHAIN (sub_interface_method))
{
found = lookup_java_interface_method2 (interface,
sub_interface_method);
if (found && (found != sub_interface_method))
{
tree saved_found_wfl = DECL_NAME (found);
reset_method_name (found);
parse_error_context
(lookup_cl (sub_interface_method),
"Interface `%s' inherits method `%s' from interface `%s'. "
"This method is redefined with a different return type in "
"interface `%s'",
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (interface))),
lang_printable_name (found, 0),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME
(DECL_CONTEXT (sub_interface_method)))),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (DECL_CONTEXT (found)))));
DECL_NAME (found) = saved_found_wfl;
}
}
}
}
/* Lookup methods in interfaces using their name and partial
signature. Return a matching method only if their types differ. */
static tree
lookup_java_interface_method2 (class, method_decl)
tree class, method_decl;
{
int i, n;
tree basetype_vec = TYPE_BINFO_BASETYPES (class), to_return;
if (!basetype_vec)
return NULL_TREE;
n = TREE_VEC_LENGTH (basetype_vec);
for (i = 0; i < n; i++)
{
tree vec_elt = TREE_VEC_ELT (basetype_vec, i), to_return;
if ((BINFO_TYPE (vec_elt) != object_type_node)
&& (to_return =
lookup_java_method2 (BINFO_TYPE (vec_elt), method_decl, 1)))
return to_return;
}
for (i = 0; i < n; i++)
{
to_return = lookup_java_interface_method2
(BINFO_TYPE (TREE_VEC_ELT (basetype_vec, i)), method_decl);
if (to_return)
return to_return;
}
return NULL_TREE;
}
/* Lookup method using their name and partial signature. Return a
matching method only if their types differ. */
static tree
lookup_java_method2 (clas, method_decl, do_interface)
tree clas, method_decl;
int do_interface;
{
tree method, method_signature, method_name, method_type, name;
method_signature = build_java_argument_signature (TREE_TYPE (method_decl));
name = DECL_NAME (method_decl);
method_name = (TREE_CODE (name) == EXPR_WITH_FILE_LOCATION ?
EXPR_WFL_NODE (name) : name);
method_type = TREE_TYPE (TREE_TYPE (method_decl));
while (clas != NULL_TREE)
{
for (method = TYPE_METHODS (clas);
method != NULL_TREE; method = TREE_CHAIN (method))
{
tree method_sig = build_java_argument_signature (TREE_TYPE (method));
tree name = DECL_NAME (method);
if ((TREE_CODE (name) == EXPR_WITH_FILE_LOCATION ?
EXPR_WFL_NODE (name) : name) == method_name
&& method_sig == method_signature
&& TREE_TYPE (TREE_TYPE (method)) != method_type)
return method;
}
clas = (do_interface ? NULL_TREE : CLASSTYPE_SUPER (clas));
}
return NULL_TREE;
}
/* Return the line that matches DECL line number. Used during error
report */
static tree
lookup_cl (decl)
tree decl;
{
static tree cl = NULL_TREE;
if (!decl)
return NULL_TREE;
if (cl == NULL_TREE)
cl = build_expr_wfl (NULL_TREE, NULL, 0, 0);
EXPR_WFL_FILENAME_NODE (cl) = get_identifier (DECL_SOURCE_FILE (decl));
EXPR_WFL_SET_LINECOL (cl, DECL_SOURCE_LINE_FIRST (decl), -1);
return cl;
}
/* Look for a simple name in the single-type import list */
static tree
find_name_in_single_imports (name)
tree name;
{
tree node;
for (node = ctxp->import_list; node; node = TREE_CHAIN (node))
if (TREE_VALUE (node) == name)
return (EXPR_WFL_NODE (TREE_PURPOSE (node)));
return NULL_TREE;
}
/* Process all single-type import. */
static int
process_imports ()
{
tree import;
int error_found;
for (import = ctxp->import_list; import; import = TREE_CHAIN (import))
{
tree to_be_found = EXPR_WFL_NODE (TREE_PURPOSE (import));
/* Don't load twice something already defined. */
if (IDENTIFIER_CLASS_VALUE (to_be_found))
continue;
QUALIFIED_P (to_be_found) = 1;
load_class (to_be_found, 0);
error_found =
check_pkg_class_access (to_be_found, TREE_PURPOSE (import));
if (!IDENTIFIER_CLASS_VALUE (to_be_found))
{
parse_error_context (TREE_PURPOSE (import),
"Class or interface `%s' not found in import",
IDENTIFIER_POINTER (to_be_found));
return 1;
}
if (error_found)
return 1;
}
return 0;
}
/* Possibly find a class imported by a single-type import statement. Return
1 if an error occured, 0 otherwise. */
static int
find_in_imports (class_type)
tree class_type;
{
tree import;
for (import = ctxp->import_list; import; import = TREE_CHAIN (import))
if (TREE_VALUE (import) == TYPE_NAME (class_type))
{
TYPE_NAME (class_type) = EXPR_WFL_NODE (TREE_PURPOSE (import));
QUALIFIED_P (TYPE_NAME (class_type)) = 1;
}
return 0;
}
static int
note_possible_classname (name, len)
char *name;
int len;
{
tree node;
if (len > 5 && strncmp (&name [len-5], ".java", 5) == 0)
len = len - 5;
else if (len > 6 && strncmp (&name [len-6], ".class", 6) == 0)
len = len - 6;
else
return 0;
node = ident_subst (name, len, "", '/', '.', "");
IS_A_CLASSFILE_NAME (node) = 1; /* Or soon to be */
QUALIFIED_P (node) = strchr (name, '/') ? 1 : 0;
return 1;
}
/* Read a import directory, gathering potential match for further type
references. Indifferently reads a filesystem or a ZIP archive
directory. */
static void
read_import_dir (wfl)
tree wfl;
{
tree package_id = EXPR_WFL_NODE (wfl);
char *package_name = IDENTIFIER_POINTER (package_id);
int package_length = IDENTIFIER_LENGTH (package_id);
DIR *dirp = NULL;
JCF *saved_jcf = current_jcf;
int found = 0;
int k;
void *entry;
struct buffer filename[1];
if (IS_AN_IMPORT_ON_DEMAND_P (package_id))
return;
IS_AN_IMPORT_ON_DEMAND_P (package_id) = 1;
BUFFER_INIT (filename);
buffer_grow (filename, package_length + 100);
for (entry = jcf_path_start (); entry != NULL; entry = jcf_path_next (entry))
{
char *entry_name = jcf_path_name (entry);
int entry_length = strlen (entry_name);
if (jcf_path_is_zipfile (entry))
{
ZipFile *zipf;
buffer_grow (filename, entry_length);
memcpy (filename->data, entry_name, entry_length - 1);
filename->data[entry_length-1] = '\0';
zipf = opendir_in_zip (filename->data, jcf_path_is_system (entry));
if (zipf == NULL)
error ("malformed .zip archive in CLASSPATH: %s", entry_name);
else
{
ZipDirectory *zipd = (ZipDirectory *) zipf->central_directory;
BUFFER_RESET (filename);
for (k = 0; k < package_length; k++)
{
char ch = package_name[k];
*filename->ptr++ = ch == '.' ? '/' : ch;
}
*filename->ptr++ = '/';
for (k = 0; k < zipf->count; k++, zipd = ZIPDIR_NEXT (zipd))
{
char *current_entry = ZIPDIR_FILENAME (zipd);
int current_entry_len = zipd->filename_length;
if (current_entry_len >= BUFFER_LENGTH (filename)
&& strncmp (filename->data, current_entry,
BUFFER_LENGTH (filename)) != 0)
continue;
found |= note_possible_classname (current_entry,
current_entry_len);
}
}
}
else
{
BUFFER_RESET (filename);
buffer_grow (filename, entry_length + package_length + 4);
strcpy (filename->data, entry_name);
filename->ptr = filename->data + entry_length;
for (k = 0; k < package_length; k++)
{
char ch = package_name[k];
*filename->ptr++ = ch == '.' ? '/' : ch;
}
*filename->ptr = '\0';
dirp = opendir (filename->data);
if (dirp == NULL)
continue;
*filename->ptr++ = '/';
for (;;)
{
int len;
char *d_name;
struct dirent *direntp = readdir (dirp);
if (!direntp)
break;
d_name = direntp->d_name;
len = strlen (direntp->d_name);
buffer_grow (filename, len+1);
strcpy (filename->ptr, d_name);
found |= note_possible_classname (filename->data + entry_length,
package_length+len+1);
}
if (dirp)
closedir (dirp);
}
}
free (filename->data);
/* Here we should have a unified way of retrieving an entry, to be
indexed. */
if (!found)
{
static int first = 1;
if (first)
{
char buffer [256];
sprintf (buffer, "Can't find default package `%s'. Check "
"the CLASSPATH environment variable and the access to the "
"archives.", package_name);
error (buffer);
java_error_count++;
first = 0;
}
else
parse_error_context (wfl, "Package `%s' not found in import",
package_name);
current_jcf = saved_jcf;
return;
}
current_jcf = saved_jcf;
}
/* Possibly find a type in the import on demands specified
types. Returns 1 if an error occured, 0 otherwise. Run throught the
entire list, to detected potential double definitions. */
static int
find_in_imports_on_demand (class_type)
tree class_type;
{
tree node, import, node_to_use = NULL_TREE;
int seen_once = -1;
tree cl = NULL_TREE;
for (import = ctxp->import_demand_list; import; import = TREE_CHAIN (import))
{
char *id_name;
obstack_grow (&temporary_obstack,
IDENTIFIER_POINTER (EXPR_WFL_NODE (TREE_PURPOSE (import))),
IDENTIFIER_LENGTH (EXPR_WFL_NODE (TREE_PURPOSE (import))));
obstack_1grow (&temporary_obstack, '.');
obstack_grow0 (&temporary_obstack,
IDENTIFIER_POINTER (TYPE_NAME (class_type)),
IDENTIFIER_LENGTH (TYPE_NAME (class_type)));
id_name = obstack_finish (&temporary_obstack);
node = maybe_get_identifier (id_name);
if (node && IS_A_CLASSFILE_NAME (node))
{
if (seen_once < 0)
{
cl = TREE_PURPOSE (import);
seen_once = 1;
node_to_use = node;
}
else
{
seen_once++;
parse_error_context
(import, "Type `%s' also potentially defined in package `%s'",
IDENTIFIER_POINTER (TYPE_NAME (class_type)),
IDENTIFIER_POINTER (EXPR_WFL_NODE (TREE_PURPOSE (import))));
}
}
}
if (seen_once == 1)
{
/* Setup lineno so that it refers to the line of the import (in
case we parse a class file and encounter errors */
tree decl;
int saved_lineno = lineno;
lineno = EXPR_WFL_LINENO (cl);
TYPE_NAME (class_type) = node_to_use;
QUALIFIED_P (TYPE_NAME (class_type)) = 1;
decl = IDENTIFIER_CLASS_VALUE (TYPE_NAME (class_type));
/* If there is no DECL set for the class or if the class isn't
loaded and not seen in source yet, the load */
if (!decl || (!CLASS_LOADED_P (TREE_TYPE (decl))
&& !CLASS_FROM_SOURCE_P (TREE_TYPE (decl))))
load_class (node_to_use, 0);
lineno = saved_lineno;
return check_pkg_class_access (TYPE_NAME (class_type), cl);
}
else
return (seen_once < 0 ? 0 : seen_once); /* It's ok not to have found */
}
static tree
resolve_package (pkg, next)
tree pkg, *next;
{
tree type_name = NULL_TREE;
char *name = IDENTIFIER_POINTER (EXPR_WFL_NODE (pkg));
/* The trick is to determine when the package name stops and were
the name of something contained in the package starts. Then we
return a fully qualified name of what we want to get. */
/* Do a quick search on well known package names */
if (!strncmp (name, "java.lang.reflect", 17))
{
*next =
TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (EXPR_WFL_QUALIFICATION (pkg))));
type_name = lookup_package_type (name, 17);
}
else if (!strncmp (name, "java.lang", 9))
{
*next = TREE_CHAIN (TREE_CHAIN (EXPR_WFL_QUALIFICATION (pkg)));
type_name = lookup_package_type (name, 9);
}
else
return NULL_TREE; /* FIXME, search all imported packages. */
return type_name;
}
static tree
lookup_package_type (name, from)
char *name;
int from;
{
char subname [128];
char *sub = &name[from+1];
while (*sub != '.' && *sub)
sub++;
strncpy (subname, name, sub-name);
subname [sub-name] = '\0';
return get_identifier (subname);
}
/* Check that CLASS_NAME refers to a PUBLIC class. Return 0 if no
access violations were found, 1 otherwise. */
static int
check_pkg_class_access (class_name, cl)
tree class_name;
tree cl;
{
tree type;
if (!QUALIFIED_P (class_name) || !IDENTIFIER_CLASS_VALUE (class_name))
return 0;
if (!(type = TREE_TYPE (IDENTIFIER_CLASS_VALUE (class_name))))
return 0;
if (!CLASS_PUBLIC (TYPE_NAME (type)))
{
/* Access to a private class within the same package is
allowed. */
tree l, r;
breakdown_qualified (&l, &r, class_name);
if (l == ctxp->package)
return 0;
parse_error_context
(cl, "Can't access %s `%s'. Only public classes and interfaces in "
"other packages can be accessed",
(CLASS_INTERFACE (TYPE_NAME (type)) ? "interface" : "class"),
IDENTIFIER_POINTER (class_name));
return 1;
}
return 0;
}
/* Local variable declaration. */
static void
declare_local_variables (modifier, type, vlist)
int modifier;
tree type;
tree vlist;
{
tree decl, current, saved_type;
tree type_wfl = NULL_TREE;
int must_chain = 0;
/* Push a new block if statements were seen between the last time we
pushed a block and now. Keep a cound of block to close */
if (BLOCK_EXPR_BODY (GET_CURRENT_BLOCK (current_function_decl)))
{
tree body = GET_CURRENT_BLOCK (current_function_decl);
tree b = enter_block ();
BLOCK_EXPR_ORIGIN (b) = body;
}
if (modifier)
{
int i;
for (i = 0; i <= 10; i++) if (1 << i & modifier) break;
if (modifier == ACC_FINAL)
{
if (flag_static_local_jdk1_1)
parse_warning_context (ctxp->modifier_ctx [i],
"Unsupported JDK1.1 `final' local variable "
"(treated as non final)");
}
else
{
parse_error_context
(ctxp->modifier_ctx [i],
"Only `final' is allowed as a local variables modifier");
return;
}
}
/* Obtain an incomplete type if TYPE is not complete. TYPE_WFL will
hold the TYPE value if a new incomplete has to be created (as
opposed to being found already existing and reused). */
SET_TYPE_FOR_RESOLUTION (type, type_wfl, must_chain);
/* If TYPE is fully resolved and we don't have a reference, make one */
PROMOTE_RECORD_IF_COMPLETE (type, must_chain);
/* Go through all the declared variables */
for (current = vlist, saved_type = type; current;
current = TREE_CHAIN (current), type = saved_type)
{
tree other, real_type;
tree wfl = TREE_PURPOSE (current);
tree name = EXPR_WFL_NODE (wfl);
tree init = TREE_VALUE (current);
/* Process NAME, as it may specify extra dimension(s) for it */
type = build_array_from_name (type, type_wfl, name, &name);
/* Variable redefinition check */
if ((other = lookup_name_in_blocks (name)))
{
variable_redefinition_error (wfl, name, TREE_TYPE (other),
DECL_SOURCE_LINE (other));
continue;
}
/* Type adjustment. We may have just readjusted TYPE because
the variable specified more dimensions. Make sure we have
a reference if we can and don't have one already. */
PROMOTE_RECORD_IF_COMPLETE (type, must_chain);
real_type = GET_REAL_TYPE (type);
/* Never layout this decl. This will be done when its scope
will be entered */
decl = build_decl (VAR_DECL, name, real_type);
BLOCK_CHAIN_DECL (decl);
/* If doing xreferencing, replace the line number with the WFL
compound value */
if (flag_emit_xref)
DECL_SOURCE_LINE (decl) = EXPR_WFL_LINECOL (wfl);
/* Don't try to use an INIT statement when an error was found */
if (init && java_error_count)
init = NULL_TREE;
/* Add the initialization function to the current function's code */
if (init)
{
/* Name might have been readjusted */
EXPR_WFL_NODE (TREE_OPERAND (init, 0)) = name;
MODIFY_EXPR_FROM_INITIALIZATION_P (init) = 1;
java_method_add_stmt (current_function_decl,
build_debugable_stmt (EXPR_WFL_LINECOL (init),
init));
}
/* Setup dependency the type of the decl */
if (must_chain)
{
jdep *dep;
register_incomplete_type (JDEP_VARIABLE, type_wfl, decl, type);
dep = CLASSD_LAST (ctxp->classd_list);
JDEP_GET_PATCH (dep) = &TREE_TYPE (decl);
}
}
SOURCE_FRONTEND_DEBUG (("Defined locals"));
}
/* Called during parsing. Build decls from argument list. */
static void
source_start_java_method (fndecl)
tree fndecl;
{
tree tem;
tree parm_decl;
int i;
current_function_decl = fndecl;
/* New scope for the function */
enter_block ();
for (tem = TYPE_ARG_TYPES (TREE_TYPE (fndecl)), i = 0;
tem != end_params_node; tem = TREE_CHAIN (tem), i++)
{
tree type = TREE_VALUE (tem);
tree name = TREE_PURPOSE (tem);
/* If type is incomplete. Create an incomplete decl and ask for
the decl to be patched later */
if (INCOMPLETE_TYPE_P (type))
{
jdep *jdep;
tree real_type = GET_REAL_TYPE (type);
parm_decl = build_decl (PARM_DECL, name, real_type);
type = obtain_incomplete_type (type);
register_incomplete_type (JDEP_PARM, NULL_TREE, NULL_TREE, type);
jdep = CLASSD_LAST (ctxp->classd_list);
JDEP_MISC (jdep) = name;
JDEP_GET_PATCH (jdep) = &TREE_TYPE (parm_decl);
}
else
parm_decl = build_decl (PARM_DECL, name, type);
BLOCK_CHAIN_DECL (parm_decl);
}
tem = BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (current_function_decl));
BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (current_function_decl)) =
nreverse (tem);
DECL_ARG_SLOT_COUNT (current_function_decl) = i;
}
/* Called during parsing. Creates an artificial method declaration. */
static tree
create_artificial_method (class, flags, type, name, args)
tree class;
int flags;
tree type, name, args;
{
int saved_lineno = lineno;
tree mdecl;
lineno = 0;
mdecl = make_node (FUNCTION_TYPE);
TREE_TYPE (mdecl) = type;
TYPE_ARG_TYPES (mdecl) = args;
mdecl = add_method (class, flags, name, build_java_signature (mdecl));
lineno = saved_lineno;
DECL_ARTIFICIAL (mdecl) = 1;
return mdecl;
}
/* Starts the body if an artifical method. */
static void
start_artificial_method_body (mdecl)
tree mdecl;
{
DECL_SOURCE_LINE (mdecl) = 1;
DECL_SOURCE_LINE_MERGE (mdecl, 1);
source_start_java_method (mdecl);
enter_block ();
}
static void
end_artificial_method_body (mdecl)
tree mdecl;
{
BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (mdecl)) = exit_block ();
exit_block ();
}
/* Called during expansion. Push decls formerly built from argument
list so they're usable during expansion. */
static void
expand_start_java_method (fndecl)
tree fndecl;
{
tree tem, *ptr;
current_function_decl = fndecl;
announce_function (fndecl);
pushlevel (1); /* Push parameters */
ptr = &DECL_ARGUMENTS (fndecl);
tem = BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (current_function_decl));
while (tem)
{
tree next = TREE_CHAIN (tem);
tree type = TREE_TYPE (tem);
#ifdef PROMOTE_PROTOTYPES
if (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)
&& INTEGRAL_TYPE_P (type))
type = integer_type_node;
#endif
DECL_ARG_TYPE (tem) = type;
layout_decl (tem, 0);
pushdecl (tem);
*ptr = tem;
ptr = &TREE_CHAIN (tem);
tem = next;
}
*ptr = NULL_TREE;
pushdecl_force_head (DECL_ARGUMENTS (fndecl));
lineno = DECL_SOURCE_LINE_FIRST (fndecl);
}
/* Terminate a function and expand its body. */
static void
source_end_java_method ()
{
tree fndecl = current_function_decl;
int flag_asynchronous_exceptions = asynchronous_exceptions;
java_parser_context_save_global ();
lineno = ctxp->last_ccb_indent1;
/* Set EH language codes */
java_set_exception_lang_code ();
/* Turn function bodies with only a NOP expr null, so they don't get
generated at all and we won't get warnings when using the -W
-Wall flags. */
if (BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (fndecl)) == empty_stmt_node)
BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (fndecl)) = NULL_TREE;
/* Generate function's code */
if (BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (fndecl))
&& ! flag_emit_class_files
&& ! flag_emit_xref)
expand_expr_stmt (BLOCK_EXPR_BODY (DECL_FUNCTION_BODY (fndecl)));
/* pop out of its parameters */
pushdecl_force_head (DECL_ARGUMENTS (fndecl));
poplevel (1, 0, 1);
BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
/* Generate rtl for function exit. */
if (! flag_emit_class_files && ! flag_emit_xref)
{
lineno = DECL_SOURCE_LINE_LAST (fndecl);
/* Emit catch-finally clauses */
emit_handlers ();
expand_function_end (input_filename, lineno, 0);
/* FIXME: If the current method contains any exception handlers,
force asynchronous_exceptions: this is necessary because signal
handlers in libjava may throw exceptions. This is far from being
a perfect solution, but it's better than doing nothing at all.*/
if (catch_clauses)
asynchronous_exceptions = 1;
/* Run the optimizers and output assembler code for this function. */
rest_of_compilation (fndecl);
}
current_function_decl = NULL_TREE;
/* permanent_allocation (1); */
java_parser_context_restore_global ();
asynchronous_exceptions = flag_asynchronous_exceptions;
}
/* Record EXPR in the current function block. Complements compound
expression second operand if necessary. */
tree
java_method_add_stmt (fndecl, expr)
tree fndecl, expr;
{
return add_stmt_to_block (GET_CURRENT_BLOCK (fndecl), NULL_TREE, expr);
}
static tree
add_stmt_to_block (b, type, stmt)
tree b, type, stmt;
{
tree body = BLOCK_EXPR_BODY (b), c;
if (java_error_count)
return body;
if ((c = add_stmt_to_compound (body, type, stmt)) == body)
return body;
BLOCK_EXPR_BODY (b) = c;
TREE_SIDE_EFFECTS (c) = 1;
return c;
}
/* Add STMT to EXISTING if possible, otherwise create a new
COMPOUND_EXPR and add STMT to it. */
static tree
add_stmt_to_compound (existing, type, stmt)
tree existing, type, stmt;
{
if (existing)
return build (COMPOUND_EXPR, type, existing, stmt);
else
return stmt;
}
/* Hold THIS for the scope of the current public method decl. */
static tree current_this;
void java_layout_seen_class_methods ()
{
tree previous_list = all_class_list;
tree end = NULL_TREE;
tree current;
while (1)
{
for (current = previous_list;
current != end; current = TREE_CHAIN (current))
layout_class_methods (TREE_TYPE (TREE_VALUE (current)));
if (previous_list != all_class_list)
{
end = previous_list;
previous_list = all_class_list;
}
else
break;
}
}
/* Layout the methods of all classes loaded in one way on an
other. Check methods of source parsed classes. Then reorder the
fields and layout the classes or the type of all source parsed
classes */
void
java_layout_classes ()
{
tree current;
int save_error_count = java_error_count;
/* Layout the methods of all classes seen so far */
java_layout_seen_class_methods ();
java_parse_abort_on_error ();
all_class_list = NULL_TREE;
/* Then check the methods of all parsed classes */
for (current = ctxp->gclass_list; current; current = TREE_CHAIN (current))
if (CLASS_FROM_SOURCE_P (TREE_TYPE (TREE_VALUE (current))))
CHECK_METHODS (TREE_VALUE (current));
java_parse_abort_on_error ();
for (current = ctxp->gclass_list; current; current = TREE_CHAIN (current))
{
current_class = TREE_TYPE (TREE_VALUE (current));
/* Reverse the fields, but leave the dummy field in front.
Fields are already ordered for Object and Class */
if (TYPE_FIELDS (current_class) && current_class != object_type_node
&& current_class != class_type_node)
{
/* If the dummy field is there, reverse the right fields and
just layout the type for proper fields offset */
if (!DECL_NAME (TYPE_FIELDS (current_class)))
{
tree fields = TYPE_FIELDS (current_class);
TREE_CHAIN (fields) = nreverse (TREE_CHAIN (fields));
TYPE_SIZE (current_class) = NULL_TREE;
layout_type (current_class);
}
/* We don't have a dummy field, we need to layout the class,
after having reversed the fields */
else
{
TYPE_FIELDS (current_class) =
nreverse (TYPE_FIELDS (current_class));
TYPE_SIZE (current_class) = NULL_TREE;
layout_class (current_class);
}
}
else
layout_class (current_class);
/* From now on, the class is considered completely loaded */
CLASS_LOADED_P (current_class) = 1;
/* Error reported by the caller */
if (java_error_count)
return;
}
/* We might have reloaded classes durign the process of laying out
classes for code generation. We must layout the methods of those
late additions, as constructor checks might use them */
java_layout_seen_class_methods ();
java_parse_abort_on_error ();
}
/* Expand all methods in all registered classes. */
void
java_complete_expand_methods ()
{
tree current;
do_not_fold = flag_emit_xref;
for (current = ctxp->class_list; current; current = TREE_CHAIN (current))
{
int is_interface;
tree class_type = CLASS_TO_HANDLE_TYPE (TREE_TYPE (current));
tree decl;
current_class = TREE_TYPE (current);
is_interface = CLASS_INTERFACE (TYPE_NAME (current_class));
/* Initialize a new constant pool */
init_outgoing_cpool ();
/* We want <clinit> (if any) to be processed first. */
decl = tree_last (TYPE_METHODS (class_type));
if (IS_CLINIT (decl))
{
tree fbody = DECL_FUNCTION_BODY (decl);
tree list;
if (fbody != NULL_TREE)
{
/* First check if we can ignore empty <clinit> */
tree block_body = BLOCK_EXPR_BODY (fbody);
current_this = NULL_TREE;
current_function_decl = decl;
if (block_body != NULL_TREE)
{
/* Prevent the use of `this' inside <clinit> */
ctxp->explicit_constructor_p = 1;
block_body = java_complete_tree (block_body);
ctxp->explicit_constructor_p = 0;
BLOCK_EXPR_BODY (fbody) = block_body;
if (block_body != NULL_TREE
&& TREE_CODE (block_body) == BLOCK
&& BLOCK_EXPR_BODY (block_body) == empty_stmt_node)
decl = NULL_TREE;
}
}
list = nreverse (TREE_CHAIN (nreverse (TYPE_METHODS (class_type))));
if (decl != NULL_TREE)
{
TREE_CHAIN (decl) = list;
TYPE_METHODS (class_type) = decl;
}
else
TYPE_METHODS (class_type) = list;
}
for (decl = TYPE_METHODS (class_type); decl; decl = TREE_CHAIN (decl))
{
current_function_decl = decl;
/* Don't generate debug info on line zero when expanding a
generated constructor. */
if (DECL_CONSTRUCTOR_P (decl) && !DECL_FUNCTION_BODY (decl))
{
/* If we found errors, it's too dangerous to try to
generate and expand a constructor */
if (!java_error_count)
{
restore_line_number_status (1);
java_complete_expand_method (decl);
restore_line_number_status (0);
}
}
else if (METHOD_ABSTRACT (decl) || METHOD_NATIVE (decl))
continue;
else
java_complete_expand_method (decl);
}
/* Now verify constructor circularity (stop after the first one
we find) */
if (!is_interface)
for (decl = TYPE_METHODS (class_type); decl; decl = TREE_CHAIN (decl))
if (DECL_CONSTRUCTOR_P (decl) &&
verify_constructor_circularity (decl, decl))
break;
/* Make the class data, register it and run the rest of decl
compilation on it */
if (!java_error_count)
{
if (flag_emit_class_files)
write_classfile (current_class);
if (flag_emit_xref)
expand_xref (current_class);
else if (! flag_syntax_only)
finish_class (current_class);
}
}
}
/* Hold a list of catch clauses list. The first element of this list is
the list of the catch clauses of the currently analysed try block. */
static tree currently_caught_type_list;
/* Complete and expand a method. */
static void
java_complete_expand_method (mdecl)
tree mdecl;
{
/* Fix constructors before expanding them */
if (DECL_CONSTRUCTOR_P (mdecl))
fix_constructors (mdecl);
/* Expand functions that have a body */
if (DECL_FUNCTION_BODY (mdecl))
{
tree fbody = DECL_FUNCTION_BODY (mdecl);
tree block_body = BLOCK_EXPR_BODY (fbody);
tree exception_copy;
expand_start_java_method (mdecl);
build_result_decl (mdecl);
current_this
= (!METHOD_STATIC (mdecl) ?
BLOCK_EXPR_DECLS (DECL_FUNCTION_BODY (mdecl)) : NULL_TREE);
/* Purge the `throws' list of unchecked exceptions. If we're
doing xref, save a copy of the list and re-install it
later. */
if (flag_emit_xref)
exception_copy = copy_list (DECL_FUNCTION_THROWS (mdecl));
purge_unchecked_exceptions (mdecl);
/* Install exceptions thrown with `throws' */
PUSH_EXCEPTIONS (DECL_FUNCTION_THROWS (mdecl));
if (block_body != NULL_TREE)
{
block_body = java_complete_tree (block_body);
if (!flag_emit_xref)
check_for_initialization (block_body);
ctxp->explicit_constructor_p = 0;
}
BLOCK_EXPR_BODY (fbody) = block_body;
if ((block_body == NULL_TREE || CAN_COMPLETE_NORMALLY (block_body))
&& TREE_CODE (TREE_TYPE (TREE_TYPE (mdecl))) != VOID_TYPE
&& !flag_emit_xref)
missing_return_error (current_function_decl);
complete_start_java_method (mdecl);
/* Don't go any further if we've found error(s) during the
expansion */
if (!java_error_count)
source_end_java_method ();
else
{
pushdecl_force_head (DECL_ARGUMENTS (mdecl));
poplevel (1, 0, 1);
}
/* Pop the exceptions and sanity check */
POP_EXCEPTIONS();
if (currently_caught_type_list)
fatal ("Exception list non empty - java_complete_expand_method");
if (flag_emit_xref)
DECL_FUNCTION_THROWS (mdecl) = exception_copy;
}
}
/* Craft a body for default constructor. Patch existing constructor
bodies with call to super() and field initialization statements if
necessary. */
static void
fix_constructors (mdecl)
tree mdecl;
{
tree body = DECL_FUNCTION_BODY (mdecl);
if (!body)
{
/* The constructor body must be crafted by hand. It's the
constructor we defined when we realize we didn't have the
CLASSNAME() constructor */
tree compound;
/* It is an error for the compiler to generate a default
constructor if the superclass doesn't have a constructor that
takes no argument */
if (verify_constructor_super ())
{
tree sclass_decl = TYPE_NAME (CLASSTYPE_SUPER (current_class));
char *n = IDENTIFIER_POINTER (DECL_NAME (sclass_decl));
parse_error_context (lookup_cl (TYPE_NAME (current_class)),
"No constructor matching `%s()' found in "
"class `%s'", n, n);
}
start_artificial_method_body (mdecl);
/* We don't generate a super constructor invocation if we're
compiling java.lang.Object. build_super_invocation takes care
of that. */
compound = java_method_add_stmt (mdecl, build_super_invocation ());
end_artificial_method_body (mdecl);
}
/* Search for an explicit constructor invocation */
else
{
int found = 0;
tree main_block = BLOCK_EXPR_BODY (body);
tree compound = NULL_TREE;
while (body)
switch (TREE_CODE (body))
{
case CALL_EXPR:
found = CALL_EXPLICIT_CONSTRUCTOR_P (body);
body = NULL_TREE;
break;
case COMPOUND_EXPR:
case EXPR_WITH_FILE_LOCATION:
body = TREE_OPERAND (body, 0);
break;
case BLOCK:
body = BLOCK_EXPR_BODY (body);
break;
default:
found = 0;
body = NULL_TREE;
}
/* The constructor is missing an invocation of super() */
if (!found)
compound = add_stmt_to_compound (compound, NULL_TREE,
build_super_invocation ());
/* Fix the constructor main block if we're adding extra stmts */
if (compound)
{
compound = add_stmt_to_compound (compound, NULL_TREE,
BLOCK_EXPR_BODY (main_block));
BLOCK_EXPR_BODY (main_block) = compound;
}
}
}
/* Browse constructors in the super class, searching for a constructor
that doesn't take any argument. Return 0 if one is found, 1
otherwise. */
static int
verify_constructor_super ()
{
tree class = CLASSTYPE_SUPER (current_class);
if (!class)
return 0;
if (class)
{
tree mdecl;
for (mdecl = TYPE_METHODS (class); mdecl; mdecl = TREE_CHAIN (mdecl))
{
if (DECL_CONSTRUCTOR_P (mdecl)
&& TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (mdecl))) == end_params_node)
return 0;
}
}
return 1;
}
/* Expand finals. */
void
java_expand_finals ()
{
}
/* Generate code for all context remembered for code generation. */
void
java_expand_classes ()
{
int save_error_count = 0;
java_parse_abort_on_error ();
if (!(ctxp = ctxp_for_generation))
return;
java_layout_classes ();
java_parse_abort_on_error ();
for (; ctxp_for_generation; ctxp_for_generation = ctxp_for_generation->next)
{
ctxp = ctxp_for_generation;
lang_init_source (2); /* Error msgs have method prototypes */
java_complete_expand_methods (); /* Complete and expand method bodies */
java_parse_abort_on_error ();
java_expand_finals (); /* Expand and check the finals */
java_parse_abort_on_error ();
java_check_final (); /* Check unitialized final */
java_parse_abort_on_error ();
}
}
/* Wrap non WFL PRIMARY around a WFL and set EXPR_WFL_QUALIFICATION to
a tree list node containing RIGHT. Fore coming RIGHTs will be
chained to this hook. LOCATION contains the location of the
separating `.' operator. */
static tree
make_qualified_primary (primary, right, location)
tree primary, right;
int location;
{
tree wfl;
/* We want to process THIS . xxx symbolicaly, to keep it consistent
with the way we're processing SUPER. A THIS from a primary as a
different form than a SUPER. Turn THIS into something symbolic */
if (TREE_CODE (primary) == THIS_EXPR)
{
wfl = build_wfl_node (this_identifier_node);
EXPR_WFL_LINECOL (wfl) = EXPR_WFL_LINECOL (primary);
wfl = make_qualified_name (wfl, right, location);
PRIMARY_P (wfl) = 1;
return wfl;
}
/* Other non WFL node are wrapped around a WFL */
else if (TREE_CODE (primary) != EXPR_WITH_FILE_LOCATION)
{
wfl = build_expr_wfl (NULL_TREE, ctxp->filename, 0, 0);
EXPR_WFL_LINECOL (wfl) = EXPR_WFL_LINECOL (primary);
EXPR_WFL_QUALIFICATION (wfl) = build_tree_list (primary, NULL_TREE);
}
else
{
wfl = primary;
if (!EXPR_WFL_QUALIFICATION (primary))
EXPR_WFL_QUALIFICATION (primary) =
build_tree_list (primary, NULL_TREE);
}
EXPR_WFL_LINECOL (right) = location;
chainon (EXPR_WFL_QUALIFICATION (wfl), build_tree_list (right, NULL_TREE));
PRIMARY_P (wfl) = 1;
return wfl;
}
/* Simple merge of two name separated by a `.' */
static tree
merge_qualified_name (left, right)
tree left, right;
{
tree node;
obstack_grow (&temporary_obstack, IDENTIFIER_POINTER (left),
IDENTIFIER_LENGTH (left));
obstack_1grow (&temporary_obstack, '.');
obstack_grow0 (&temporary_obstack, IDENTIFIER_POINTER (right),
IDENTIFIER_LENGTH (right));
node = get_identifier (obstack_base (&temporary_obstack));
obstack_free (&temporary_obstack, obstack_base (&temporary_obstack));
QUALIFIED_P (node) = 1;
return node;
}
/* Merge the two parts of a qualified name into LEFT. Set the
location information of the resulting node to LOCATION, usually
inherited from the location information of the `.' operator. */
static tree
make_qualified_name (left, right, location)
tree left, right;
int location;
{
#ifdef USE_COMPONENT_REF
tree node = build (COMPONENT_REF, NULL_TREE, left, right);
EXPR_WFL_LINECOL (node) = location;
return node;
#else
tree left_id = EXPR_WFL_NODE (left);
tree right_id = EXPR_WFL_NODE (right);
tree wfl, merge;
merge = merge_qualified_name (left_id, right_id);
/* Left wasn't qualified and is now qualified */
if (!QUALIFIED_P (left_id))
{
tree wfl = build_expr_wfl (left_id, ctxp->filename, 0, 0);
EXPR_WFL_LINECOL (wfl) = EXPR_WFL_LINECOL (left);
EXPR_WFL_QUALIFICATION (left) = build_tree_list (wfl, NULL_TREE);
}
wfl = build_expr_wfl (right_id, ctxp->filename, 0, 0);
EXPR_WFL_LINECOL (wfl) = location;
chainon (EXPR_WFL_QUALIFICATION (left), build_tree_list (wfl, NULL_TREE));
EXPR_WFL_NODE (left) = merge;
return left;
#endif
}
/* Extract the last identifier component of the qualified in WFL. The
last identifier is removed from the linked list */
static tree
cut_identifier_in_qualified (wfl)
tree wfl;
{
tree q;
tree previous = NULL_TREE;
for (q = EXPR_WFL_QUALIFICATION (wfl); ; previous = q, q = TREE_CHAIN (q))
if (!TREE_CHAIN (q))
{
if (!previous)
fatal ("Operating on a non qualified qualified WFL - "
"cut_identifier_in_qualified");
TREE_CHAIN (previous) = NULL_TREE;
return TREE_PURPOSE (q);
}
}
/* Resolve the expression name NAME. Return its decl. */
static tree
resolve_expression_name (id, orig)
tree id;
tree *orig;
{
tree name = EXPR_WFL_NODE (id);
tree decl;
/* 6.5.5.1: Simple expression names */
if (!PRIMARY_P (id) && !QUALIFIED_P (name))
{
/* 15.13.1: NAME can appear within the scope of a local variable
declaration */
if ((decl = IDENTIFIER_LOCAL_VALUE (name)))
return decl;
/* 15.13.1: NAME can appear within a class declaration */
else
{
decl = lookup_field_wrapper (current_class, name);
if (decl)
{
int fs = FIELD_STATIC (decl);
/* Instance variable (8.3.1.1) can't appear within
static method, static initializer or initializer for
a static variable. */
if (!fs && METHOD_STATIC (current_function_decl))
{
static_ref_err (id, name, current_class);
return error_mark_node;
}
/* Instance variables can't appear as an argument of
an explicit constructor invocation */
if (!fs && ctxp->explicit_constructor_p)
{
parse_error_context
(id, "Can't reference `%s' before the superclass "
"constructor has been called", IDENTIFIER_POINTER (name));
return error_mark_node;
}
/* Otherwise build what it takes to access the field */
decl = build_field_ref ((fs ? NULL_TREE : current_this),
DECL_CONTEXT (decl), name);
if (fs && !flag_emit_class_files && !flag_emit_xref)
decl = build_class_init (DECL_CONTEXT (decl), decl);
/* We may be asked to save the real field access node */
if (orig)
*orig = decl;
/* And we return what we got */
return decl;
}
/* Fall down to error report on undefined variable */
}
}
/* 6.5.5.2 Qualified Expression Names */
else
{
if (orig)
*orig = NULL_TREE;
qualify_ambiguous_name (id);
/* 15.10.1 Field Access Using a Primary and/or Expression Name */
/* 15.10.2: Accessing Superclass Members using super */
return resolve_field_access (id, NULL, NULL);
}
/* We've got an error here */
parse_error_context (id, "Undefined variable `%s'",
IDENTIFIER_POINTER (name));
return error_mark_node;
}
static void
static_ref_err (wfl, field_id, class_type)
tree wfl, field_id, class_type;
{
parse_error_context
(wfl,
"Can't make a static reference to nonstatic variable `%s' in class `%s'",
IDENTIFIER_POINTER (field_id),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (class_type))));
}
/* 15.10.1 Field Acess Using a Primary and/or Expression Name.
We return something suitable to generate the field access. We also
return the field decl in FIELD_DECL and its type in FIELD_TYPE. If
recipient's address can be null. */
static tree
resolve_field_access (qual_wfl, field_decl, field_type)
tree qual_wfl;
tree *field_decl, *field_type;
{
int is_static = 0;
tree field_ref;
tree decl, where_found, type_found;
if (resolve_qualified_expression_name (qual_wfl, &decl,
&where_found, &type_found))
return error_mark_node;
/* Resolve the LENGTH field of an array here */
if (DECL_NAME (decl) == length_identifier_node && TYPE_ARRAY_P (type_found)
&& ! flag_emit_class_files && ! flag_emit_xref)
{
tree length = build_java_array_length_access (where_found);
field_ref =
build_java_arraynull_check (type_found, length, int_type_node);
}
/* We might have been trying to resolve field.method(). In which
case, the resolution is over and decl is the answer */
else if (JDECL_P (decl) && IDENTIFIER_LOCAL_VALUE (DECL_NAME (decl)) == decl)
field_ref = decl;
else if (JDECL_P (decl))
{
int static_final_found = 0;
if (!type_found)
type_found = DECL_CONTEXT (decl);
is_static = JDECL_P (decl) && FIELD_STATIC (decl);
if (FIELD_FINAL (decl)
&& JPRIMITIVE_TYPE_P (TREE_TYPE (decl))
&& DECL_LANG_SPECIFIC (decl)
&& DECL_INITIAL (decl))
{
field_ref = DECL_INITIAL (decl);
static_final_found = 1;
}
else
field_ref = build_field_ref ((is_static && !flag_emit_xref?
NULL_TREE : where_found),
type_found, DECL_NAME (decl));
if (field_ref == error_mark_node)
return error_mark_node;
if (is_static && !static_final_found
&& !flag_emit_class_files && !flag_emit_xref)
{
field_ref = build_class_init (type_found, field_ref);
/* If the static field was identified by an expression that
needs to be generated, make the field access a compound
expression whose first part is the evaluation of the
field selector part. */
if (where_found && TREE_CODE (where_found) != TYPE_DECL
&& TREE_CODE (where_found) != RECORD_TYPE)
{
tree type = QUAL_DECL_TYPE (field_ref);
if (TREE_CODE (type) == RECORD_TYPE)
type = build_pointer_type (type);
field_ref = build (COMPOUND_EXPR, type, where_found, field_ref);
}
}
}
else
field_ref = decl;
if (field_decl)
*field_decl = decl;
if (field_type)
*field_type = (QUAL_DECL_TYPE (decl) ?
QUAL_DECL_TYPE (decl) : TREE_TYPE (decl));
return field_ref;
}
/* If NODE is an access to f static field, strip out the class
initialization part and return the field decl, otherwise, return
NODE. */
static tree
strip_out_static_field_access_decl (node)
tree node;
{
if (TREE_CODE (node) == COMPOUND_EXPR)
{
tree op1 = TREE_OPERAND (node, 1);
if (TREE_CODE (op1) == COMPOUND_EXPR)
{
tree call = TREE_OPERAND (op1, 0);
if (TREE_CODE (call) == CALL_EXPR
&& TREE_CODE (TREE_OPERAND (call, 0)) == ADDR_EXPR
&& TREE_OPERAND (TREE_OPERAND (call, 0), 0)
== soft_initclass_node)
return TREE_OPERAND (op1, 1);
}
}
return node;
}
/* 6.5.5.2: Qualified Expression Names */
static int
resolve_qualified_expression_name (wfl, found_decl, where_found, type_found)
tree wfl;
tree *found_decl, *type_found, *where_found;
{
int from_type = 0; /* Field search initiated from a type */
int from_super = 0, from_cast = 0;
int previous_call_static = 0;
int is_static;
tree decl = NULL_TREE, type = NULL_TREE, q;
*type_found = *where_found = NULL_TREE;
for (q = EXPR_WFL_QUALIFICATION (wfl); q; q = TREE_CHAIN (q))
{
tree qual_wfl = QUAL_WFL (q);
/* 15.10.1 Field Access Using a Primary */
switch (TREE_CODE (qual_wfl))
{
case CALL_EXPR:
case NEW_CLASS_EXPR:
/* If the access to the function call is a non static field,
build the code to access it. */
if (JDECL_P (decl) && !FIELD_STATIC (decl))
{
decl = maybe_access_field (decl, *where_found,
DECL_CONTEXT (decl));
if (decl == error_mark_node)
return 1;
}
/* And code for the function call */
if (complete_function_arguments (qual_wfl))
return 1;
if (from_super && TREE_CODE (qual_wfl) == CALL_EXPR)
CALL_USING_SUPER (qual_wfl) = 1;
*where_found =
patch_method_invocation (qual_wfl, decl, type, &is_static, NULL);
if (*where_found == error_mark_node)
return 1;
*type_found = type = QUAL_DECL_TYPE (*where_found);
/* If the previous call was static and this one is too,
build a compound expression to hold the two (because in
that case, previous function calls aren't transported as
forcoming function's argument. */
if (previous_call_static && is_static)
{
decl = build (COMPOUND_EXPR, type, decl, *where_found);
TREE_SIDE_EFFECTS (decl) = 1;
}
else
{
previous_call_static = is_static;
decl = *where_found;
}
continue;
case NEW_ARRAY_EXPR:
*where_found = decl = java_complete_tree (qual_wfl);
if (decl == error_mark_node)
return 1;
*type_found = type = QUAL_DECL_TYPE (decl);
CLASS_LOADED_P (type) = 1;
continue;
case CONVERT_EXPR:
*where_found = decl = java_complete_tree (qual_wfl);
if (decl == error_mark_node)
return 1;
*type_found = type = QUAL_DECL_TYPE (decl);
from_cast = 1;
continue;
case CONDITIONAL_EXPR:
case STRING_CST:
*where_found = decl = java_complete_tree (qual_wfl);
if (decl == error_mark_node)
return 1;
*type_found = type = QUAL_DECL_TYPE (decl);
continue;
case ARRAY_REF:
/* If the access to the function call is a non static field,
build the code to access it. */
if (JDECL_P (decl) && !FIELD_STATIC (decl))
{
decl = maybe_access_field (decl, *where_found, type);
if (decl == error_mark_node)
return 1;
}
/* And code for the array reference expression */
decl = java_complete_tree (qual_wfl);
if (decl == error_mark_node)
return 1;
type = QUAL_DECL_TYPE (decl);
continue;
default:
/* Fix for -Wall Just go to the next statement. Don't
continue */
break;
}
/* If we fall here, we weren't processing a (static) function call. */
previous_call_static = 0;
/* It can be the keyword THIS */
if (EXPR_WFL_NODE (qual_wfl) == this_identifier_node)
{
if (!current_this)
{
parse_error_context
(wfl, "Keyword `this' used outside allowed context");
return 1;
}
/* We have to generate code for intermediate acess */
*where_found = decl = current_this;
*type_found = type = QUAL_DECL_TYPE (decl);
continue;
}
/* 15.10.2 Accessing Superclass Members using SUPER */
if (EXPR_WFL_NODE (qual_wfl) == super_identifier_node)
{
tree node;
/* Check on the restricted use of SUPER */
if (METHOD_STATIC (current_function_decl)
|| current_class == object_type_node)
{
parse_error_context
(wfl, "Keyword `super' used outside allowed context");
return 1;
}
/* Otherwise, treat SUPER as (SUPER_CLASS)THIS */
node = build_cast (EXPR_WFL_LINECOL (qual_wfl),
CLASSTYPE_SUPER (current_class),
build_this (EXPR_WFL_LINECOL (qual_wfl)));
*where_found = decl = java_complete_tree (node);
if (decl == error_mark_node)
return 1;
*type_found = type = QUAL_DECL_TYPE (decl);
from_super = from_type = 1;
continue;
}
/* 15.13.1: Can't search for field name in packages, so we
assume a variable/class name was meant. */
if (RESOLVE_PACKAGE_NAME_P (qual_wfl))
{
tree name = resolve_package (wfl, &q);
if (name)
{
*where_found = decl = resolve_no_layout (name, qual_wfl);
/* We wan't to be absolutely that the class is laid
out. We're going to search something inside it. */
*type_found = type = TREE_TYPE (decl);
layout_class (type);
from_type = 1;
/* Should be a list, really. FIXME */
RESOLVE_EXPRESSION_NAME_P (QUAL_WFL (TREE_CHAIN (q))) = 1;
RESOLVE_PACKAGE_NAME_P (QUAL_WFL (TREE_CHAIN (q))) = 0;
}
else
{
if (from_super || from_cast)
parse_error_context
((from_cast ? qual_wfl : wfl),
"No variable `%s' defined in class `%s'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (qual_wfl)),
lang_printable_name (type, 0));
else
parse_error_context
(qual_wfl, "Undefined variable or class name: `%s'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (qual_wfl)));
return 1;
}
}
/* We have a type name. It's been already resolved when the
expression was qualified. */
else if (RESOLVE_TYPE_NAME_P (qual_wfl))
{
if (!(decl = QUAL_RESOLUTION (q)))
return 1; /* Error reported already */
if (not_accessible_p (TREE_TYPE (decl), decl, 0))
{
parse_error_context
(qual_wfl, "Can't access %s field `%s.%s' from `%s'",
java_accstring_lookup (get_access_flags_from_decl (decl)),
GET_TYPE_NAME (type),
IDENTIFIER_POINTER (DECL_NAME (decl)),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))));
return 1;
}
check_deprecation (qual_wfl, decl);
type = TREE_TYPE (decl);
from_type = 1;
}
/* We resolve and expression name */
else
{
tree field_decl;
/* If there exists an early resolution, use it. That occurs
only once and we know that there are more things to
come. Don't do that when processing something after SUPER
(we need more thing to be put in place below */
if (!from_super && QUAL_RESOLUTION (q))
{
decl = QUAL_RESOLUTION (q);
if (!type)
{
if (TREE_CODE (decl) == FIELD_DECL && !FIELD_STATIC (decl))
{
if (current_this)
*where_found = current_this;
else
{
static_ref_err (qual_wfl, DECL_NAME (decl),
current_class);
return 1;
}
}
else
{
*where_found = TREE_TYPE (decl);
if (TREE_CODE (*where_found) == POINTER_TYPE)
*where_found = TREE_TYPE (*where_found);
}
}
}
/* We have to search for a field, knowing the type of its
container. The flag FROM_TYPE indicates that we resolved
the last member of the expression as a type name, which
means that for the resolution of this field, we'll look
for other errors than if it was resolved as a member of
an other field. */
else
{
int is_static;
tree field_decl_type; /* For layout */
if (!from_type && !JREFERENCE_TYPE_P (type))
{
parse_error_context
(qual_wfl, "Attempt to reference field `%s' in `%s %s'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (qual_wfl)),
lang_printable_name (type, 0),
IDENTIFIER_POINTER (DECL_NAME (field_decl)));
return 1;
}
field_decl = lookup_field_wrapper (type,
EXPR_WFL_NODE (qual_wfl));
if (field_decl == NULL_TREE)
{
parse_error_context
(qual_wfl, "No variable `%s' defined in type `%s'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (qual_wfl)),
GET_TYPE_NAME (type));
return 1;
}
if (field_decl == error_mark_node)
return 1;
/* Layout the type of field_decl, since we may need
it. Don't do primitive types or loaded classes. The
situation of non primitive arrays may not handled
properly here. FIXME */
if (TREE_CODE (TREE_TYPE (field_decl)) == POINTER_TYPE)
field_decl_type = TREE_TYPE (TREE_TYPE (field_decl));
else
field_decl_type = TREE_TYPE (field_decl);
if (!JPRIMITIVE_TYPE_P (field_decl_type)
&& !CLASS_LOADED_P (field_decl_type)
&& !TYPE_ARRAY_P (field_decl_type))
resolve_and_layout (field_decl_type, NULL_TREE);
if (TYPE_ARRAY_P (field_decl_type))
CLASS_LOADED_P (field_decl_type) = 1;
/* Check on accessibility here */
if (not_accessible_p (type, field_decl, from_super))
{
parse_error_context
(qual_wfl,
"Can't access %s field `%s.%s' from `%s'",
java_accstring_lookup
(get_access_flags_from_decl (field_decl)),
GET_TYPE_NAME (type),
IDENTIFIER_POINTER (DECL_NAME (field_decl)),
IDENTIFIER_POINTER
(DECL_NAME (TYPE_NAME (current_class))));
return 1;
}
check_deprecation (qual_wfl, field_decl);
/* There are things to check when fields are accessed
from type. There are no restrictions on a static
declaration of the field when it is accessed from an
interface */
is_static = FIELD_STATIC (field_decl);
if (!from_super && from_type
&& !TYPE_INTERFACE_P (type) && !is_static)
{
static_ref_err (qual_wfl, EXPR_WFL_NODE (qual_wfl), type);
return 1;
}
from_cast = from_super = 0;
/* If we need to generate something to get a proper
handle on what this field is accessed from, do it
now. */
if (!is_static)
{
decl = maybe_access_field (decl, *where_found, *type_found);
if (decl == error_mark_node)
return 1;
}
/* We want to keep the location were found it, and the type
we found. */
*where_found = decl;
*type_found = type;
/* This is the decl found and eventually the next one to
search from */
decl = field_decl;
}
from_type = 0;
type = QUAL_DECL_TYPE (decl);
}
}
*found_decl = decl;
return 0;
}
/* 6.6 Qualified name and access control. Returns 1 if MEMBER (a decl)
can't be accessed from REFERENCE (a record type). */
int not_accessible_p (reference, member, from_super)
tree reference, member;
int from_super;
{
int access_flag = get_access_flags_from_decl (member);
/* Access always granted for members declared public */
if (access_flag & ACC_PUBLIC)
return 0;
/* Check access on protected members */
if (access_flag & ACC_PROTECTED)
{
/* Access granted if it occurs from within the package
containing the class in which the protected member is
declared */
if (class_in_current_package (DECL_CONTEXT (member)))
return 0;
/* If accessed with the form `super.member', then access is granted */
if (from_super)
return 0;
/* Otherwise, access is granted if occuring from the class where
member is declared or a subclass of it */
if (inherits_from_p (reference, current_class))
return 0;
return 1;
}
/* Check access on private members. Access is granted only if it
occurs from within the class in witch it is declared */
if (access_flag & ACC_PRIVATE)
return (current_class == DECL_CONTEXT (member) ? 0 : 1);
/* Default access are permitted only when occuring within the
package in which the type (REFERENCE) is declared. In other words,
REFERENCE is defined in the current package */
if (ctxp->package)
return !class_in_current_package (reference);
/* Otherwise, access is granted */
return 0;
}
/* Test deprecated decl access. */
static void
check_deprecation (wfl, decl)
tree wfl, decl;
{
char *file = DECL_SOURCE_FILE (decl);
/* Complain if the field is deprecated and the file it was defined
in isn't compiled at the same time the file which contains its
use is */
if (DECL_DEPRECATED (decl)
&& !IS_A_COMMAND_LINE_FILENAME_P (get_identifier (file)))
{
char the [20];
switch (TREE_CODE (decl))
{
case FUNCTION_DECL:
strcpy (the, "method");
break;
case FIELD_DECL:
strcpy (the, "field");
break;
case TYPE_DECL:
strcpy (the, "class");
break;
default:
fatal ("unexpected DECL code - check_deprecation");
}
parse_warning_context
(wfl, "The %s `%s' in class `%s' has been deprecated",
the, lang_printable_name (decl, 0),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl)))));
}
}
/* Returns 1 if class was declared in the current package, 0 otherwise */
static int
class_in_current_package (class)
tree class;
{
static tree cache = NULL_TREE;
int qualified_flag;
tree left;
if (cache == class)
return 1;
qualified_flag = QUALIFIED_P (DECL_NAME (TYPE_NAME (class)));
/* If the current package is empty and the name of CLASS is
qualified, class isn't in the current package. If there is a
current package and the name of the CLASS is not qualified, class
isn't in the current package */
if ((!ctxp->package && qualified_flag) || (ctxp->package && !qualified_flag))
return 0;
/* If there is not package and the name of CLASS isn't qualified,
they belong to the same unnamed package */
if (!ctxp->package && !qualified_flag)
return 1;
/* Compare the left part of the name of CLASS with the package name */
breakdown_qualified (&left, NULL, DECL_NAME (TYPE_NAME (class)));
if (ctxp->package == left)
{
cache = class;
return 1;
}
return 0;
}
/* This function may generate code to access DECL from WHERE. This is
done only if certain conditions meet. */
static tree
maybe_access_field (decl, where, type)
tree decl, where, type;
{
if (TREE_CODE (decl) == FIELD_DECL && decl != current_this
&& !FIELD_STATIC (decl))
decl = build_field_ref (where ? where : current_this,
(type ? type : DECL_CONTEXT (decl)),
DECL_NAME (decl));
return decl;
}
/* Build a method invocation, by patching PATCH. If non NULL
and according to the situation, PRIMARY and WHERE may be
used. IS_STATIC is set to 1 if the invoked function is static. */
static tree
patch_method_invocation (patch, primary, where, is_static, ret_decl)
tree patch, primary, where;
int *is_static;
tree *ret_decl;
{
tree wfl = TREE_OPERAND (patch, 0);
tree args = TREE_OPERAND (patch, 1);
tree name = EXPR_WFL_NODE (wfl);
tree list;
int is_static_flag = 0;
int is_super_init = 0;
tree this_arg = NULL_TREE;
/* Should be overriden if everything goes well. Otherwise, if
something fails, it should keep this value. It stop the
evaluation of a bogus assignment. See java_complete_tree,
MODIFY_EXPR: for the reasons why we sometimes want to keep on
evaluating an assignment */
TREE_TYPE (patch) = error_mark_node;
/* Since lookup functions are messing with line numbers, save the
context now. */
java_parser_context_save_global ();
/* 15.11.1: Compile-Time Step 1: Determine Class or Interface to Search */
/* Resolution of qualified name, excluding constructors */
if (QUALIFIED_P (name) && !CALL_CONSTRUCTOR_P (patch))
{
tree class_decl, identifier, identifier_wfl;
/* Extract the last IDENTIFIER of the qualified
expression. This is a wfl and we will use it's location
data during error report. */
identifier_wfl = cut_identifier_in_qualified (wfl);
identifier = EXPR_WFL_NODE (identifier_wfl);
/* Given the context, IDENTIFIER is syntactically qualified
as a MethodName. We need to qualify what's before */
qualify_ambiguous_name (wfl);
/* Package resolution are erroneous */
if (RESOLVE_PACKAGE_NAME_P (wfl))
{
tree remainder;
breakdown_qualified (&remainder, NULL, EXPR_WFL_NODE (wfl));
parse_error_context (wfl, "Can't search method `%s' in package "
"`%s'",IDENTIFIER_POINTER (identifier),
IDENTIFIER_POINTER (remainder));
PATCH_METHOD_RETURN_ERROR ();
}
/* We're resolving a call from a type */
else if (RESOLVE_TYPE_NAME_P (wfl))
{
tree decl = QUAL_RESOLUTION (EXPR_WFL_QUALIFICATION (wfl));
tree name = DECL_NAME (decl);
tree type;
class_decl = resolve_and_layout (name, wfl);
if (CLASS_INTERFACE (decl))
{
parse_error_context
(identifier_wfl, "Can't make static reference to method "
"`%s' in interface `%s'", IDENTIFIER_POINTER (identifier),
IDENTIFIER_POINTER (name));
PATCH_METHOD_RETURN_ERROR ();
}
/* Look the method up in the type selector. The method ought
to be static. */
type = TREE_TYPE (class_decl);
list = lookup_method_invoke (0, wfl, type, identifier, args);
if (list && !METHOD_STATIC (list))
{
char *fct_name = strdup (lang_printable_name (list, 0));
parse_error_context
(identifier_wfl,
"Can't make static reference to method `%s %s' in class `%s'",
lang_printable_name (TREE_TYPE (TREE_TYPE (list)), 0),
fct_name, IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type))));
free (fct_name);
PATCH_METHOD_RETURN_ERROR ();
}
args = nreverse (args);
}
/* We're resolving an expression name */
else
{
tree field, type;
/* 1- Find the field to which the call applies */
field = resolve_field_access (wfl, NULL, &type);
if (field == error_mark_node)
PATCH_METHOD_RETURN_ERROR ();
/* field is used in lieu of a primary. It alows us not to
report errors on erroneous use of `this' in
constructors. */
primary = field;
/* 2- Do the layout of the class where the last field
was found, so we can search it. */
class_decl = resolve_and_layout (type, NULL_TREE);
if (class_decl != NULL_TREE)
type = TREE_TYPE (class_decl);
/* 3- Retrieve a filtered list of method matches, Refine
if necessary. In any cases, point out errors. */
list = lookup_method_invoke (0, identifier_wfl, type,
identifier, args);
/* 4- Add the field as an argument */
args = nreverse (args);
this_arg = field;
}
/* IDENTIFIER_WFL will be used to report any problem further */
wfl = identifier_wfl;
}
/* Resolution of simple names, names generated after a primary: or
constructors */
else
{
tree class_to_search;
int lc; /* Looking for Constructor */
/* We search constructor in their target class */
if (CALL_CONSTRUCTOR_P (patch))
{
if (TREE_CODE (patch) == NEW_CLASS_EXPR)
class_to_search = EXPR_WFL_NODE (wfl);
else if (EXPR_WFL_NODE (TREE_OPERAND (patch, 0)) ==
this_identifier_node)
class_to_search = NULL_TREE;
else if (EXPR_WFL_NODE (TREE_OPERAND (patch, 0)) ==
super_identifier_node)
{
is_super_init = 1;
if (CLASSTYPE_SUPER (current_class))
class_to_search =
DECL_NAME (TYPE_NAME (CLASSTYPE_SUPER (current_class)));
else
{
parse_error_context (wfl, "Can't invoke super constructor "
"on java.lang.Object");
PATCH_METHOD_RETURN_ERROR ();
}
}
/* Class to search is NULL if we're searching the current one */
if (class_to_search)
{
class_to_search = resolve_and_layout (class_to_search,
NULL_TREE);
if (!class_to_search)
{
parse_error_context
(wfl, "Class `%s' not found in type declaration",
IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl)));
PATCH_METHOD_RETURN_ERROR ();
}
/* Can't instantiate an abstract class, but we can
invoke it's constructor. It's use within the `new'
context is denied here. */
if (CLASS_ABSTRACT (class_to_search)
&& TREE_CODE (patch) == NEW_CLASS_EXPR)
{
parse_error_context
(wfl, "Class `%s' is an abstract class. It can't be "
"instantiated", IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl)));
PATCH_METHOD_RETURN_ERROR ();
}
class_to_search = TREE_TYPE (class_to_search);
}
else
class_to_search = current_class;
lc = 1;
}
/* This is a regular search in the local class, unless an
alternate class is specified. */
else
{
class_to_search = (where ? where : current_class);
lc = 0;
}
/* NAME is a simple identifier or comes from a primary. Search
in the class whose declaration contain the method being
invoked. */
resolve_and_layout (class_to_search, NULL_TREE);
list = lookup_method_invoke (lc, wfl, class_to_search, name, args);
/* Don't continue if no method were found, as the next statement
can't be executed then. */
if (!list)
PATCH_METHOD_RETURN_ERROR ();
/* Check for static reference if non static methods */
if (check_for_static_method_reference (wfl, patch, list,
class_to_search, primary))
PATCH_METHOD_RETURN_ERROR ();
/* Non static methods are called with the current object extra
argument. If patch a `new TYPE()', the argument is the value
returned by the object allocator. If method is resolved as a
primary, use the primary otherwise use the current THIS. */
args = nreverse (args);
if (TREE_CODE (patch) != NEW_CLASS_EXPR)
this_arg = primary ? primary : current_this;
}
/* Merge point of all resolution schemes. If we have nothing, this
is an error, already signaled */
if (!list)
PATCH_METHOD_RETURN_ERROR ();
/* Check accessibility, position the is_static flag, build and
return the call */
if (not_accessible_p (DECL_CONTEXT (current_function_decl), list, 0))
{
char *fct_name = strdup (lang_printable_name (list, 0));
parse_error_context
(wfl, "Can't access %s method `%s %s.%s' from `%s'",
java_accstring_lookup (get_access_flags_from_decl (list)),
lang_printable_name (TREE_TYPE (TREE_TYPE (list)), 0),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (DECL_CONTEXT (list)))),
fct_name, IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))));
free (fct_name);
PATCH_METHOD_RETURN_ERROR ();
}
check_deprecation (wfl, list);
is_static_flag = METHOD_STATIC (list);
if (! METHOD_STATIC (list) && this_arg != NULL_TREE)
args = tree_cons (NULL_TREE, this_arg, args);
/* In the context of an explicit constructor invocation, we can't
invoke any method relying on `this'. Exceptions are: we're
invoking a static function, primary exists and is not the current
this, we're creating a new object. */
if (ctxp->explicit_constructor_p
&& !is_static_flag
&& (!primary || primary == current_this)
&& (TREE_CODE (patch) != NEW_CLASS_EXPR))
{
parse_error_context
(wfl, "Can't reference `this' before the superclass constructor has "
"been called");
PATCH_METHOD_RETURN_ERROR ();
}
java_parser_context_restore_global ();
if (is_static)
*is_static = is_static_flag;
/* Sometimes, we want the decl of the selected method. Such as for
EH checking */
if (ret_decl)
*ret_decl = list;
patch = patch_invoke (patch, list, args);
if (is_super_init && CLASS_HAS_FINIT_P (current_class))
{
/* Generate the code used to initialize fields declared with an
initialization statement. For now, it returns a call the the
artificial function $finit$, if required. */
tree finit_call =
build_method_invocation (build_expr_wfl (finit_identifier_node,
input_filename, 0, 0),
NULL_TREE);
patch = build (COMPOUND_EXPR, void_type_node, patch,
java_complete_tree (finit_call));
CAN_COMPLETE_NORMALLY (patch) = 1;
}
return patch;
}
/* Check that we're not trying to do a static reference to a method in
non static method. Return 1 if it's the case, 0 otherwise. */
static int
check_for_static_method_reference (wfl, node, method, where, primary)
tree wfl, node, method, where, primary;
{
if (METHOD_STATIC (current_function_decl)
&& !METHOD_STATIC (method) && !primary && !CALL_CONSTRUCTOR_P (node))
{
char *fct_name = strdup (lang_printable_name (method, 0));
parse_error_context
(wfl, "Can't make static reference to method `%s %s' in class `%s'",
lang_printable_name (TREE_TYPE (TREE_TYPE (method)), 0), fct_name,
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (where))));
free (fct_name);
return 1;
}
return 0;
}
/* Patch an invoke expression METHOD and ARGS, based on its invocation
mode. */
static tree
patch_invoke (patch, method, args)
tree patch, method, args;
{
tree dtable, func;
tree original_call, t, ta;
/* Last step for args: convert build-in types. If we're dealing with
a new TYPE() type call, the first argument to the constructor
isn't found in the incomming argument list, but delivered by
`new' */
t = TYPE_ARG_TYPES (TREE_TYPE (method));
if (TREE_CODE (patch) == NEW_CLASS_EXPR)
t = TREE_CHAIN (t);
for (ta = args; t != end_params_node && ta;
t = TREE_CHAIN (t), ta = TREE_CHAIN (ta))
if (JPRIMITIVE_TYPE_P (TREE_TYPE (TREE_VALUE (ta))) &&
TREE_TYPE (TREE_VALUE (ta)) != TREE_VALUE (t))
TREE_VALUE (ta) = convert (TREE_VALUE (t), TREE_VALUE (ta));
if (flag_emit_class_files || flag_emit_xref)
func = method;
else
{
tree signature = build_java_signature (TREE_TYPE (method));
switch (invocation_mode (method, CALL_USING_SUPER (patch)))
{
case INVOKE_VIRTUAL:
dtable = invoke_build_dtable (0, args);
func = build_invokevirtual (dtable, method);
break;
case INVOKE_SUPER:
case INVOKE_STATIC:
func = build_known_method_ref (method, TREE_TYPE (method),
DECL_CONTEXT (method),
signature, args);
break;
case INVOKE_INTERFACE:
dtable = invoke_build_dtable (1, args);
func = build_invokeinterface (dtable, DECL_NAME (method), signature);
break;
default:
fatal ("internal error - unknown invocation_mode result");
}
/* Ensure self_type is initialized, (invokestatic). FIXME */
func = build1 (NOP_EXPR, build_pointer_type (TREE_TYPE (method)), func);
}
TREE_TYPE (patch) = TREE_TYPE (TREE_TYPE (method));
TREE_OPERAND (patch, 0) = func;
TREE_OPERAND (patch, 1) = args;
original_call = patch;
/* We're processing a `new TYPE ()' form. New is called an its
returned value is the first argument to the constructor. We build
a COMPOUND_EXPR and use saved expression so that the overall NEW
expression value is a pointer to a newly created and initialized
class. */
if (TREE_CODE (original_call) == NEW_CLASS_EXPR)
{
tree class = DECL_CONTEXT (method);
tree c1, saved_new, size, new;
if (flag_emit_class_files || flag_emit_xref)
{
TREE_TYPE (patch) = build_pointer_type (class);
return patch;
}
if (!TYPE_SIZE (class))
safe_layout_class (class);
size = size_in_bytes (class);
new = build (CALL_EXPR, promote_type (class),
build_address_of (alloc_object_node),
tree_cons (NULL_TREE, build_class_ref (class),
build_tree_list (NULL_TREE,
size_in_bytes (class))),
NULL_TREE);
saved_new = save_expr (new);
c1 = build_tree_list (NULL_TREE, saved_new);
TREE_CHAIN (c1) = TREE_OPERAND (original_call, 1);
TREE_OPERAND (original_call, 1) = c1;
TREE_SET_CODE (original_call, CALL_EXPR);
patch = build (COMPOUND_EXPR, TREE_TYPE (new), patch, saved_new);
}
return patch;
}
static int
invocation_mode (method, super)
tree method;
int super;
{
int access = get_access_flags_from_decl (method);
if (super)
return INVOKE_SUPER;
if (access & ACC_STATIC || access & ACC_FINAL || access & ACC_PRIVATE)
return INVOKE_STATIC;
if (CLASS_FINAL (TYPE_NAME (DECL_CONTEXT (method))))
return INVOKE_STATIC;
if (CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (method))))
return INVOKE_INTERFACE;
if (DECL_CONSTRUCTOR_P (method))
return INVOKE_STATIC;
return INVOKE_VIRTUAL;
}
/* Retrieve a refined list of matching methods. It covers the step
15.11.2 (Compile-Time Step 2) */
static tree
lookup_method_invoke (lc, cl, class, name, arg_list)
int lc;
tree cl;
tree class, name, arg_list;
{
tree atl = end_params_node; /* Arg Type List */
tree method, signature, list, node;
char *candidates; /* Used for error report */
/* Fix the arguments */
for (node = arg_list; node; node = TREE_CHAIN (node))
{
tree current_arg = TREE_TYPE (TREE_VALUE (node));
/* Non primitive type may have to be resolved */
if (!JPRIMITIVE_TYPE_P (current_arg))
resolve_and_layout (current_arg, NULL_TREE);
/* And promoted */
if (TREE_CODE (current_arg) == RECORD_TYPE)
current_arg = promote_type (current_arg);
atl = tree_cons (NULL_TREE, current_arg, atl);
}
/* Find all candidates and then refine the list, searching for the
most specific method. */
list = find_applicable_accessible_methods_list (lc, class, name, atl);
list = find_most_specific_methods_list (list);
if (list && !TREE_CHAIN (list))
return TREE_VALUE (list);
/* Issue an error. List candidates if any. Candidates are listed
only if accessible (non accessible methods may end-up here for
the sake of a better error report). */
candidates = NULL;
if (list)
{
tree current;
obstack_grow (&temporary_obstack, ". Candidates are:\n", 18);
for (current = list; current; current = TREE_CHAIN (current))
{
tree cm = TREE_VALUE (current);
char string [4096];
if (!cm || not_accessible_p (class, cm, 0))
continue;
sprintf
(string, " `%s' in `%s'%s",
get_printable_method_name (cm),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (DECL_CONTEXT (cm)))),
(TREE_CHAIN (current) ? "\n" : ""));
obstack_grow (&temporary_obstack, string, strlen (string));
}
obstack_1grow (&temporary_obstack, '\0');
candidates = obstack_finish (&temporary_obstack);
}
/* Issue the error message */
method = make_node (FUNCTION_TYPE);
TYPE_ARG_TYPES (method) = atl;
signature = build_java_argument_signature (method);
parse_error_context (cl, "Can't find %s `%s(%s)' in class `%s'%s",
(lc ? "constructor" : "method"),
(lc ?
IDENTIFIER_POINTER(DECL_NAME (TYPE_NAME (class))) :
IDENTIFIER_POINTER (name)),
IDENTIFIER_POINTER (signature),
IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (class))),
(candidates ? candidates : ""));
return NULL_TREE;
}
/* 15.11.2.1: Find Methods that are Applicable and Accessible. LC is 1
when we're looking for a constructor. */
static tree
find_applicable_accessible_methods_list (lc, class, name, arglist)
int lc;
tree class, name, arglist;
{
tree list = NULL_TREE, all_list = NULL_TREE;
/* Search interfaces */
if (CLASS_INTERFACE (TYPE_NAME (class)))
{
static tree searched_interfaces = NULL_TREE;
static int search_not_done = 0;
int i, n;
tree basetype_vec = TYPE_BINFO_BASETYPES (class);
/* Have we searched this interface already? */
if (searched_interfaces)
{
tree current;
for (current = searched_interfaces;
current; current = TREE_CHAIN (current))
if (TREE_VALUE (current) == class)
return NULL;
}
searched_interfaces = tree_cons (NULL_TREE, class, searched_interfaces);
search_applicable_methods_list
(lc, TYPE_METHODS (class), name, arglist, &list, &all_list);
n = TREE_VEC_LENGTH (basetype_vec);
for (i = 0; i < n; i++)
{
tree t = BINFO_TYPE (TREE_VEC_ELT (basetype_vec, i));
tree rlist;
/* Skip java.lang.Object (we'll search it once later.) */
if (t == object_type_node)
continue;
search_not_done++;
rlist = find_applicable_accessible_methods_list (lc, t, name,
arglist);
all_list = chainon (rlist, (list ? list : all_list));
search_not_done--;
}
/* We're done. Reset the searched interfaces list and finally search
java.lang.Object */
if (!search_not_done)
{
searched_interfaces = NULL_TREE;
search_applicable_methods_list (lc, TYPE_METHODS (object_type_node),
name, arglist, &list, &all_list);
}
}
/* Search classes */
else
while (class != NULL_TREE)
{
search_applicable_methods_list
(lc, TYPE_METHODS (class), name, arglist, &list, &all_list);
class = (lc ? NULL_TREE : CLASSTYPE_SUPER (class));
}
/* Either return the list obtained or all selected (but
inaccessible) methods for better error report. */
return (!list ? all_list : list);
}
/* Effectively search for the approriate method in method */
static void
search_applicable_methods_list(lc, method, name, arglist, list, all_list)
int lc;
tree method, name, arglist;
tree *list, *all_list;
{
for (; method; method = TREE_CHAIN (method))
{
/* When dealing with constructor, stop here, otherwise search
other classes */
if (lc && !DECL_CONSTRUCTOR_P (method))
continue;
else if (!lc && (DECL_CONSTRUCTOR_P (method)
|| (GET_METHOD_NAME (method) != name)))
continue;
if (argument_types_convertible (method, arglist))
{
/* Retain accessible methods only */
if (!not_accessible_p (DECL_CONTEXT (current_function_decl),
method, 0))
*list = tree_cons (NULL_TREE, method, *list);
else
/* Also retain all selected method here */
*all_list = tree_cons (NULL_TREE, method, *list);
}
}
}
/* 15.11.2.2 Choose the Most Specific Method */
static tree
find_most_specific_methods_list (list)
tree list;
{
int max = 0;
tree current, new_list = NULL_TREE;
for (current = list; current; current = TREE_CHAIN (current))
{
tree method;
DECL_SPECIFIC_COUNT (TREE_VALUE (current)) = 0;
for (method = list; method; method = TREE_CHAIN (method))
{
/* Don't test a method against itself */
if (method == current)
continue;
/* Compare arguments and location where method where declared */
if (argument_types_convertible (TREE_VALUE (method),
TREE_VALUE (current))
&& valid_method_invocation_conversion_p
(DECL_CONTEXT (TREE_VALUE (method)),
DECL_CONTEXT (TREE_VALUE (current))))
{
int v = ++DECL_SPECIFIC_COUNT (TREE_VALUE (current));
max = (v > max ? v : max);
}
}
}
/* Review the list and select the maximally specific methods */
for (current = list; current; current = TREE_CHAIN (current))
if (DECL_SPECIFIC_COUNT (TREE_VALUE (current)) == max)
new_list = tree_cons (NULL_TREE, TREE_VALUE (current), new_list);
/* If we can't find one, lower expectations and try to gather multiple
maximally specific methods */
while (!new_list)
{
while (--max > 0)
{
if (DECL_SPECIFIC_COUNT (TREE_VALUE (current)) == max)
new_list = tree_cons (NULL_TREE, TREE_VALUE (current), new_list);
}
return new_list;
}
return new_list;
}
/* Make sure that the type of each M2_OR_ARGLIST arguments can be
converted by method invocation conversion (5.3) to the type of the
corresponding parameter of M1. Implementation expects M2_OR_ARGLIST
to change less often than M1. */
static int
argument_types_convertible (m1, m2_or_arglist)
tree m1, m2_or_arglist;
{
static tree m2_arg_value = NULL_TREE;
static tree m2_arg_cache = NULL_TREE;
register tree m1_arg, m2_arg;
m1_arg = TYPE_ARG_TYPES (TREE_TYPE (m1));
if (!METHOD_STATIC (m1))
m1_arg = TREE_CHAIN (m1_arg);
if (m2_arg_value == m2_or_arglist)
m2_arg = m2_arg_cache;
else
{
/* M2_OR_ARGLIST can be a function DECL or a raw list of
argument types */
if (m2_or_arglist && TREE_CODE (m2_or_arglist) == FUNCTION_DECL)
{
m2_arg = TYPE_ARG_TYPES (TREE_TYPE (m2_or_arglist));
if (!METHOD_STATIC (m2_or_arglist))
m2_arg = TREE_CHAIN (m2_arg);
}
else
m2_arg = m2_or_arglist;
m2_arg_value = m2_or_arglist;
m2_arg_cache = m2_arg;
}
while (m1_arg != end_params_node && m2_arg != end_params_node)
{
resolve_and_layout (TREE_VALUE (m1_arg), NULL_TREE);
if (!valid_method_invocation_conversion_p (TREE_VALUE (m1_arg),
TREE_VALUE (m2_arg)))
break;
m1_arg = TREE_CHAIN (m1_arg);
m2_arg = TREE_CHAIN (m2_arg);
}
return m1_arg == end_params_node && m2_arg == end_params_node;
}
/* Qualification routines */
static void
qualify_ambiguous_name (id)
tree id;
{
tree qual, qual_wfl, name, decl, ptr_type, saved_current_class;
int again, super_found = 0, this_found = 0, new_array_found = 0;
int code;
/* We first qualify the first element, then derive qualification of
others based on the first one. If the first element is qualified
by a resolution (field or type), this resolution is stored in the
QUAL_RESOLUTION of the qual element being examined. We need to
save the current_class since the use of SUPER might change the
its value. */
saved_current_class = current_class;
qual = EXPR_WFL_QUALIFICATION (id);
do {
/* Simple qualified expression feature a qual_wfl that is a
WFL. Expression derived from a primary feature more complicated
things like a CALL_EXPR. Expression from primary need to be
worked out to extract the part on which the qualification will
take place. */
qual_wfl = QUAL_WFL (qual);
switch (TREE_CODE (qual_wfl))
{
case CALL_EXPR:
qual_wfl = TREE_OPERAND (qual_wfl, 0);
if (TREE_CODE (qual_wfl) != EXPR_WITH_FILE_LOCATION)
{
qual = EXPR_WFL_QUALIFICATION (qual_wfl);
qual_wfl = QUAL_WFL (qual);
}
break;
case NEW_ARRAY_EXPR:
qual = TREE_CHAIN (qual);
new_array_found = 1;
continue;
case NEW_CLASS_EXPR:
case CONVERT_EXPR:
qual_wfl = TREE_OPERAND (qual_wfl, 0);
break;
case ARRAY_REF:
while (TREE_CODE (qual_wfl) == ARRAY_REF)
qual_wfl = TREE_OPERAND (qual_wfl, 0);
break;
case STRING_CST:
qual = TREE_CHAIN (qual);
qual_wfl = QUAL_WFL (qual);
break;
default:
/* Fix for -Wall. Just break doing nothing */
break;
}
ptr_type = current_class;
again = 0;
code = TREE_CODE (qual_wfl);
/* Pos evaluation: non WFL leading expression nodes */
if (code == CONVERT_EXPR
&& TREE_CODE (TREE_TYPE (qual_wfl)) == EXPR_WITH_FILE_LOCATION)
name = EXPR_WFL_NODE (TREE_TYPE (qual_wfl));
else if (code == ARRAY_REF &&
TREE_CODE (TREE_OPERAND (qual_wfl, 0)) == EXPR_WITH_FILE_LOCATION)
name = EXPR_WFL_NODE (TREE_OPERAND (qual_wfl, 0));
else if (code == CALL_EXPR &&
TREE_CODE (TREE_OPERAND (qual_wfl, 0)) == EXPR_WITH_FILE_LOCATION)
name = EXPR_WFL_NODE (TREE_OPERAND (qual_wfl, 0));
else if (code == STRING_CST || code == CONDITIONAL_EXPR)
{
qual = TREE_CHAIN (qual);
qual_wfl = QUAL_WFL (qual);
again = 1;
}
else
name = EXPR_WFL_NODE (qual_wfl);
/* If we have a THIS (from a primary), we set the context accordingly */
if (name == this_identifier_node)
{
qual = TREE_CHAIN (qual);
qual_wfl = QUAL_WFL (qual);
if (TREE_CODE (qual_wfl) == CALL_EXPR)
again = 1;
else
name = EXPR_WFL_NODE (qual_wfl);
this_found = 1;
}
/* If we have a SUPER, we set the context accordingly */
if (name == super_identifier_node)
{
current_class = CLASSTYPE_SUPER (ptr_type);
/* Check that there is such a thing as a super class. If not,
return. The error will be caught later on, during the
resolution */
if (!current_class)
{
current_class = saved_current_class;
return;
}
qual = TREE_CHAIN (qual);
/* Do one more interation to set things up */
super_found = again = 1;
}
} while (again);
/* If name appears within the scope of a location variable
declaration or parameter declaration, then it is an expression
name. We don't carry this test out if we're in the context of the
use of SUPER or THIS */
if (!this_found && !super_found && (decl = IDENTIFIER_LOCAL_VALUE (name)))
{
RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;
QUAL_RESOLUTION (qual) = decl;
}
/* If within the class/interface NAME was found to be used there
exists a (possibly inherited) field named NAME, then this is an
expression name. If we saw a NEW_ARRAY_EXPR before and want to
address length, it is OK. */
else if ((decl = lookup_field_wrapper (ptr_type, name))
|| (new_array_found && name == length_identifier_node))
{
RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;
QUAL_RESOLUTION (qual) = (new_array_found ? NULL_TREE : decl);
}
/* We reclassify NAME as a type name if:
- NAME is a class/interface declared within the compilation
unit containing NAME,
- NAME is imported via a single-type-import declaration,
- NAME is declared in an another compilation unit of the package
of the compilation unit containing NAME,
- NAME is declared by exactly on type-import-on-demand declaration
of the compilation unit containing NAME. */
else if ((decl = resolve_and_layout (name, NULL_TREE)))
{
RESOLVE_TYPE_NAME_P (qual_wfl) = 1;
QUAL_RESOLUTION (qual) = decl;
}
/* Method call are expression name */
else if (TREE_CODE (QUAL_WFL (qual)) == CALL_EXPR
|| TREE_CODE (QUAL_WFL (qual)) == ARRAY_REF
|| TREE_CODE (QUAL_WFL (qual)) == CONVERT_EXPR)
RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;
/* Check here that NAME isn't declared by more than one
type-import-on-demand declaration of the compilation unit
containing NAME. FIXME */
/* Otherwise, NAME is reclassified as a package name */
else
RESOLVE_PACKAGE_NAME_P (qual_wfl) = 1;
/* Propagate the qualification accross other components of the
qualified name */
for (qual = TREE_CHAIN (qual); qual;
qual_wfl = QUAL_WFL (qual), qual = TREE_CHAIN (qual))
{
if (RESOLVE_PACKAGE_NAME_P (qual_wfl))
RESOLVE_PACKAGE_NAME_P (QUAL_WFL (qual)) = 1;
else
RESOLVE_EXPRESSION_NAME_P (QUAL_WFL (qual)) = 1;
}
/* Store the global qualification for the ambiguous part of ID back
into ID fields */
if (RESOLVE_EXPRESSION_NAME_P (qual_wfl))
RESOLVE_EXPRESSION_NAME_P (id) = 1;
else if (RESOLVE_TYPE_NAME_P (qual_wfl))
RESOLVE_TYPE_NAME_P (id) = 1;
else if (RESOLVE_PACKAGE_NAME_P (qual_wfl))
RESOLVE_PACKAGE_NAME_P (id) = 1;
/* Restore the current class */
current_class = saved_current_class;
}
static int
breakdown_qualified (left, right, source)
tree *left, *right, source;
{
char *p = IDENTIFIER_POINTER (source), *base;
int l = IDENTIFIER_LENGTH (source);
/* Breakdown NAME into REMAINDER . IDENTIFIER */
base = p;
p += (l-1);
while (*p != '.' && p != base)
p--;
/* We didn't find a '.'. Return an error */
if (p == base)
return 1;
*p = '\0';
if (right)
*right = get_identifier (p+1);
*left = get_identifier (IDENTIFIER_POINTER (source));
*p = '.';
return 0;
}
/* Patch tree nodes in a function body. When a BLOCK is found, push
local variable decls if present.
Same as java_complete_lhs, but does resolve static finals to values. */
static tree
java_complete_tree (node)
tree node;
{
node = java_complete_lhs (node);
if (TREE_CODE (node) == VAR_DECL && FIELD_STATIC (node)
&& FIELD_FINAL (node) && DECL_INITIAL (node) != NULL_TREE
&& !flag_emit_xref)
{
tree value = DECL_INITIAL (node);
DECL_INITIAL (node) = NULL_TREE;
value = fold_constant_for_init (value, node);
DECL_INITIAL (node) = value;
if (value != NULL_TREE)
return value;
}
return node;
}
static tree
java_stabilize_reference (node)
tree node;
{
if (TREE_CODE (node) == COMPOUND_EXPR)
{
tree op0 = TREE_OPERAND (node, 0);
tree op1 = TREE_OPERAND (node, 1);
TREE_OPERAND (node, 0) = save_expr (op0);
TREE_OPERAND (node, 1) = java_stabilize_reference (op1);
return node;
}
else
return stabilize_reference (node);
}
/* Patch tree nodes in a function body. When a BLOCK is found, push
local variable decls if present.
Same as java_complete_tree, but does not resolve static finals to values. */
static tree
java_complete_lhs (node)
tree node;
{
tree nn, cn, wfl_op1, wfl_op2, wfl_op3;
int flag;
/* CONVERT_EXPR always has its type set, even though it needs to be
worked out. */
if (TREE_TYPE (node) && TREE_CODE (node) != CONVERT_EXPR)
return node;
/* The switch block implements cases processing container nodes
first. Contained nodes are always written back. Leaves come
next and return a value. */
switch (TREE_CODE (node))
{
case BLOCK:
/* 1- Block section.
Set the local values on decl names so we can identify them
faster when they're referenced. At that stage, identifiers
are legal so we don't check for declaration errors. */
for (cn = BLOCK_EXPR_DECLS (node); cn; cn = TREE_CHAIN (cn))
{
DECL_CONTEXT (cn) = current_function_decl;
IDENTIFIER_LOCAL_VALUE (DECL_NAME (cn)) = cn;
}
if (BLOCK_EXPR_BODY (node) == NULL_TREE)
CAN_COMPLETE_NORMALLY (node) = 1;
else
{
tree stmt = BLOCK_EXPR_BODY (node);
tree *ptr;
int error_seen = 0;
if (TREE_CODE (stmt) == COMPOUND_EXPR)
{
/* Re-order from (((A; B); C); ...; Z) to
(A; (B; (C ; (...; Z)))).
This makes it easier to scan the statements left-to-right
without using recursion (which might overflow the stack
if the block has many statements. */
for (;;)
{
tree left = TREE_OPERAND (stmt, 0);
if (TREE_CODE (left) != COMPOUND_EXPR)
break;
TREE_OPERAND (stmt, 0) = TREE_OPERAND (left, 1);
TREE_OPERAND (left, 1) = stmt;
stmt = left;
}
BLOCK_EXPR_BODY (node) = stmt;
}
/* Now do the actual complete, without deep recursion for
long blocks. */
ptr = &BLOCK_EXPR_BODY (node);
while (TREE_CODE (*ptr) == COMPOUND_EXPR
&& TREE_OPERAND (*ptr, 1) != empty_stmt_node)
{
tree cur = java_complete_tree (TREE_OPERAND (*ptr, 0));
tree *next = &TREE_OPERAND (*ptr, 1);
TREE_OPERAND (*ptr, 0) = cur;
if (cur == empty_stmt_node)
{
/* Optimization; makes it easier to detect empty bodies.
Most useful for <clinit> with all-constant initializer. */
*ptr = *next;
continue;
}
if (TREE_CODE (cur) == ERROR_MARK)
error_seen++;
else if (! CAN_COMPLETE_NORMALLY (cur))
{
wfl_op2 = *next;
for (;;)
{
if (TREE_CODE (wfl_op2) == BLOCK)
wfl_op2 = BLOCK_EXPR_BODY (wfl_op2);
else if (TREE_CODE (wfl_op2) == COMPOUND_EXPR)
wfl_op2 = TREE_OPERAND (wfl_op2, 0);
else
break;
}
if (TREE_CODE (wfl_op2) != CASE_EXPR
&& TREE_CODE (wfl_op2) != DEFAULT_EXPR)
unreachable_stmt_error (*ptr);
}
ptr = next;
}
*ptr = java_complete_tree (*ptr);
if (TREE_CODE (*ptr) == ERROR_MARK || error_seen > 0)
return error_mark_node;
CAN_COMPLETE_NORMALLY (node) = CAN_COMPLETE_NORMALLY (*ptr);
}
/* Turn local bindings to null */
for (cn = BLOCK_EXPR_DECLS (node); cn; cn = TREE_CHAIN (cn))
IDENTIFIER_LOCAL_VALUE (DECL_NAME (cn)) = NULL_TREE;
TREE_TYPE (node) = void_type_node;
break;
/* 2- They are expressions but ultimately deal with statements */
case THROW_EXPR:
wfl_op1 = TREE_OPERAND (node, 0);
COMPLETE_CHECK_OP_0 (node);
/* CAN_COMPLETE_NORMALLY (node) = 0; */
return patch_throw_statement (node, wfl_op1);
case SYNCHRONIZED_EXPR:
wfl_op1 = TREE_OPERAND (node, 0);
return patch_synchronized_statement (node, wfl_op1);
case TRY_EXPR:
return patch_try_statement (node);
case TRY_FINALLY_EXPR:
COMPLETE_CHECK_OP_0 (node);
COMPLETE_CHECK_OP_1 (node);
CAN_COMPLETE_NORMALLY (node)
= (CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 0))
&& CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1)));
TREE_TYPE (node) = TREE_TYPE (TREE_OPERAND (node, 0));
return node;
case CLEANUP_POINT_EXPR:
COMPLETE_CHECK_OP_0 (node);
TREE_TYPE (node) = void_type_node;
CAN_COMPLETE_NORMALLY (node) =
CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 0));
return node;
case WITH_CLEANUP_EXPR:
COMPLETE_CHECK_OP_0 (node);
COMPLETE_CHECK_OP_2 (node);
CAN_COMPLETE_NORMALLY (node) =
CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 0));
TREE_TYPE (node) = void_type_node;
return node;
case LABELED_BLOCK_EXPR:
PUSH_LABELED_BLOCK (node);
if (LABELED_BLOCK_BODY (node))
COMPLETE_CHECK_OP_1 (node);
TREE_TYPE (node) = void_type_node;
POP_LABELED_BLOCK ();
if (LABELED_BLOCK_BODY (node) == empty_stmt_node)
{
LABELED_BLOCK_BODY (node) = NULL_TREE;
CAN_COMPLETE_NORMALLY (node) = 1;
}
else if (CAN_COMPLETE_NORMALLY (LABELED_BLOCK_BODY (node)))
CAN_COMPLETE_NORMALLY (node) = 1;
return node;
case EXIT_BLOCK_EXPR:
/* We don't complete operand 1, because it's the return value of
the EXIT_BLOCK_EXPR which doesn't exist it Java */
return patch_bc_statement (node);
case CASE_EXPR:
cn = java_complete_tree (TREE_OPERAND (node, 0));
if (cn == error_mark_node)
return cn;
/* First, the case expression must be constant. Values of final
fields are accepted. */
cn = fold (cn);
if ((TREE_CODE (cn) == COMPOUND_EXPR || TREE_CODE (cn) == COMPONENT_REF)
&& JDECL_P (TREE_OPERAND (cn, 1))
&& FIELD_FINAL (TREE_OPERAND (cn, 1))
&& DECL_INITIAL (TREE_OPERAND (cn, 1)))
cn = fold_constant_for_init (DECL_INITIAL (TREE_OPERAND (cn, 1)),
TREE_OPERAND (cn, 1));
if (!TREE_CONSTANT (cn) && !flag_emit_xref)
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context (node, "Constant expression required");
return error_mark_node;
}
nn = ctxp->current_loop;
/* It must be assignable to the type of the switch expression. */
if (!try_builtin_assignconv (NULL_TREE,
TREE_TYPE (TREE_OPERAND (nn, 0)), cn))
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context
(wfl_operator,
"Incompatible type for case. Can't convert `%s' to `int'",
lang_printable_name (TREE_TYPE (cn), 0));
return error_mark_node;
}
cn = fold (convert (int_type_node, cn));
/* Multiple instance of a case label bearing the same
value is checked during code generation. The case
expression is allright so far. */
TREE_OPERAND (node, 0) = cn;
TREE_TYPE (node) = void_type_node;
CAN_COMPLETE_NORMALLY (node) = 1;
TREE_SIDE_EFFECTS (node) = 1;
break;
case DEFAULT_EXPR:
nn = ctxp->current_loop;
/* Only one default label is allowed per switch statement */
if (SWITCH_HAS_DEFAULT (nn))
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context (wfl_operator,
"Duplicate case label: `default'");
return error_mark_node;
}
else
SWITCH_HAS_DEFAULT (nn) = 1;
TREE_TYPE (node) = void_type_node;
TREE_SIDE_EFFECTS (node) = 1;
CAN_COMPLETE_NORMALLY (node) = 1;
break;
case SWITCH_EXPR:
case LOOP_EXPR:
PUSH_LOOP (node);
/* Check whether the loop was enclosed in a labeled
statement. If not, create one, insert the loop in it and
return the node */
nn = patch_loop_statement (node);
/* Anyways, walk the body of the loop */
if (TREE_CODE (node) == LOOP_EXPR)
TREE_OPERAND (node, 0) = java_complete_tree (TREE_OPERAND (node, 0));
/* Switch statement: walk the switch expression and the cases */
else
node = patch_switch_statement (node);
if (TREE_OPERAND (node, 0) == error_mark_node)
nn = error_mark_node;
else
{
TREE_TYPE (nn) = TREE_TYPE (node) = void_type_node;
/* If we returned something different, that's because we
inserted a label. Pop the label too. */
if (nn != node)
{
if (CAN_COMPLETE_NORMALLY (node))
CAN_COMPLETE_NORMALLY (nn) = 1;
POP_LABELED_BLOCK ();
}
}
POP_LOOP ();
return nn;
case EXIT_EXPR:
TREE_OPERAND (node, 0) = java_complete_tree (TREE_OPERAND (node, 0));
return patch_exit_expr (node);
case COND_EXPR:
/* Condition */
TREE_OPERAND (node, 0) = java_complete_tree (TREE_OPERAND (node, 0));
if (TREE_OPERAND (node, 0) == error_mark_node)
return error_mark_node;
/* then-else branches */
TREE_OPERAND (node, 1) = java_complete_tree (TREE_OPERAND (node, 1));
if (TREE_OPERAND (node, 1) == error_mark_node)
return error_mark_node;
TREE_OPERAND (node, 2) = java_complete_tree (TREE_OPERAND (node, 2));
if (TREE_OPERAND (node, 2) == error_mark_node)
return error_mark_node;
return patch_if_else_statement (node);
break;
case CONDITIONAL_EXPR:
/* Condition */
wfl_op1 = TREE_OPERAND (node, 0);
COMPLETE_CHECK_OP_0 (node);
wfl_op2 = TREE_OPERAND (node, 1);
COMPLETE_CHECK_OP_1 (node);
wfl_op3 = TREE_OPERAND (node, 2);
COMPLETE_CHECK_OP_2 (node);
return patch_conditional_expr (node, wfl_op1, wfl_op2);
/* 3- Expression section */
case COMPOUND_EXPR:
wfl_op2 = TREE_OPERAND (node, 1);
TREE_OPERAND (node, 0) = nn =
java_complete_tree (TREE_OPERAND (node, 0));
if (wfl_op2 == empty_stmt_node)
CAN_COMPLETE_NORMALLY (node) = CAN_COMPLETE_NORMALLY (nn);
else
{
if (! CAN_COMPLETE_NORMALLY (nn) && TREE_CODE (nn) != ERROR_MARK)
{
/* An unreachable condition in a do-while statement
is *not* (technically) an unreachable statement. */
nn = wfl_op2;
if (TREE_CODE (nn) == EXPR_WITH_FILE_LOCATION)
nn = EXPR_WFL_NODE (nn);
if (TREE_CODE (nn) != EXIT_EXPR)
{
SET_WFL_OPERATOR (wfl_operator, node, wfl_op2);
parse_error_context (wfl_operator, "Unreachable statement");
}
}
TREE_OPERAND (node, 1) = java_complete_tree (TREE_OPERAND (node, 1));
if (TREE_OPERAND (node, 1) == error_mark_node)
return error_mark_node;
CAN_COMPLETE_NORMALLY (node)
= CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1));
}
TREE_TYPE (node) = TREE_TYPE (TREE_OPERAND (node, 1));
break;
case RETURN_EXPR:
/* CAN_COMPLETE_NORMALLY (node) = 0; */
return patch_return (node);
case EXPR_WITH_FILE_LOCATION:
if (!EXPR_WFL_NODE (node) /* Or a PRIMARY flag ? */
|| TREE_CODE (EXPR_WFL_NODE (node)) == IDENTIFIER_NODE)
{
tree wfl = node;
node = resolve_expression_name (node, NULL);
if (node == error_mark_node)
return node;
/* Keep line number information somewhere were it doesn't
disrupt the completion process. */
if (flag_emit_xref)
{
EXPR_WFL_NODE (wfl) = TREE_OPERAND (node, 1);
TREE_OPERAND (node, 1) = wfl;
}
CAN_COMPLETE_NORMALLY (node) = 1;
}
else
{
tree body;
int save_lineno = lineno;
lineno = EXPR_WFL_LINENO (node);
body = java_complete_tree (EXPR_WFL_NODE (node));
lineno = save_lineno;
EXPR_WFL_NODE (node) = body;
TREE_SIDE_EFFECTS (node) = TREE_SIDE_EFFECTS (body);
CAN_COMPLETE_NORMALLY (node) = CAN_COMPLETE_NORMALLY (body);
if (body == empty_stmt_node)
{
/* Optimization; makes it easier to detect empty bodies. */
return body;
}
if (body == error_mark_node)
{
/* Its important for the evaluation of assignment that
this mark on the TREE_TYPE is propagated. */
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
else
TREE_TYPE (node) = TREE_TYPE (EXPR_WFL_NODE (node));
}
break;
case NEW_ARRAY_EXPR:
/* Patch all the dimensions */
flag = 0;
for (cn = TREE_OPERAND (node, 1); cn; cn = TREE_CHAIN (cn))
{
int location = EXPR_WFL_LINECOL (TREE_VALUE (cn));
tree dim = java_complete_tree (TREE_VALUE (cn));
if (dim == error_mark_node)
{
flag = 1;
continue;
}
else
{
TREE_VALUE (cn) = dim;
/* Setup the location of the current dimension, for
later error report. */
TREE_PURPOSE (cn) =
build_expr_wfl (NULL_TREE, input_filename, 0, 0);
EXPR_WFL_LINECOL (TREE_PURPOSE (cn)) = location;
}
}
/* They complete the array creation expression, if no errors
were found. */
CAN_COMPLETE_NORMALLY (node) = 1;
return (flag ? error_mark_node
: force_evaluation_order (patch_newarray (node)));
case NEW_CLASS_EXPR:
case CALL_EXPR:
/* Complete function's argument(s) first */
if (complete_function_arguments (node))
return error_mark_node;
else
{
tree decl, wfl = TREE_OPERAND (node, 0);
int in_this = CALL_THIS_CONSTRUCTOR_P (node);
node = patch_method_invocation (node, NULL_TREE,
NULL_TREE, 0, &decl);
if (node == error_mark_node)
return error_mark_node;
check_thrown_exceptions (EXPR_WFL_LINECOL (node), decl);
/* If we call this(...), register signature and positions */
if (in_this)
DECL_CONSTRUCTOR_CALLS (current_function_decl) =
tree_cons (wfl, decl,
DECL_CONSTRUCTOR_CALLS (current_function_decl));
CAN_COMPLETE_NORMALLY (node) = 1;
return force_evaluation_order (node);
}
case MODIFY_EXPR:
/* Save potential wfls */
wfl_op1 = TREE_OPERAND (node, 0);
TREE_OPERAND (node, 0) = nn = java_complete_lhs (wfl_op1);
if (MODIFY_EXPR_FROM_INITIALIZATION_P (node)
&& TREE_CODE (nn) == VAR_DECL && TREE_STATIC (nn)
&& DECL_INITIAL (nn) != NULL_TREE)
{
tree value = fold_constant_for_init (nn, nn);
if (value != NULL_TREE)
{
tree type = TREE_TYPE (value);
if (JPRIMITIVE_TYPE_P (type) || type == string_ptr_type_node)
return empty_stmt_node;
}
DECL_INITIAL (nn) = NULL_TREE;
}
wfl_op2 = TREE_OPERAND (node, 1);
if (TREE_OPERAND (node, 0) == error_mark_node)
return error_mark_node;
if (COMPOUND_ASSIGN_P (wfl_op2))
{
tree lvalue = java_stabilize_reference (TREE_OPERAND (node, 0));
/* Hand stablize the lhs on both places */
TREE_OPERAND (node, 0) = lvalue;
TREE_OPERAND (TREE_OPERAND (node, 1), 0) = lvalue;
/* Now complete the RHS. We write it back later on. */
nn = java_complete_tree (TREE_OPERAND (node, 1));
if ((cn = patch_string (nn)))
nn = cn;
/* The last part of the rewrite for E1 op= E2 is to have
E1 = (T)(E1 op E2), with T being the type of E1. */
nn = java_complete_tree (build_cast (EXPR_WFL_LINECOL (wfl_op2),
TREE_TYPE (lvalue), nn));
}
/* If we're about to patch a NEW_ARRAY_INIT, we call a special
function to complete this RHS */
else if (TREE_CODE (wfl_op2) == NEW_ARRAY_INIT)
nn = patch_new_array_init (TREE_TYPE (TREE_OPERAND (node, 0)),
TREE_OPERAND (node, 1));
/* Otherwise we simply complete the RHS */
else
nn = java_complete_tree (TREE_OPERAND (node, 1));
if (nn == error_mark_node)
return error_mark_node;
/* Write back the RHS as we evaluated it. */
TREE_OPERAND (node, 1) = nn;
/* In case we're handling = with a String as a RHS, we need to
produce a String out of the RHS (it might still be a
STRING_CST or a StringBuffer at this stage */
if ((nn = patch_string (TREE_OPERAND (node, 1))))
TREE_OPERAND (node, 1) = nn;
node = patch_assignment (node, wfl_op1, wfl_op2);
CAN_COMPLETE_NORMALLY (node) = 1;
return node;
case MULT_EXPR:
case PLUS_EXPR:
case MINUS_EXPR:
case LSHIFT_EXPR:
case RSHIFT_EXPR:
case URSHIFT_EXPR:
case BIT_AND_EXPR:
case BIT_XOR_EXPR:
case BIT_IOR_EXPR:
case TRUNC_MOD_EXPR:
case RDIV_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_ORIF_EXPR:
case EQ_EXPR:
case NE_EXPR:
case GT_EXPR:
case GE_EXPR:
case LT_EXPR:
case LE_EXPR:
/* Operands 0 and 1 are WFL in certain cases only. patch_binop
knows how to handle those cases. */
wfl_op1 = TREE_OPERAND (node, 0);
wfl_op2 = TREE_OPERAND (node, 1);
CAN_COMPLETE_NORMALLY (node) = 1;
/* Don't complete string nodes if dealing with the PLUS operand. */
if (TREE_CODE (node) != PLUS_EXPR || !JSTRING_P (wfl_op1))
{
nn = java_complete_tree (wfl_op1);
if (nn == error_mark_node)
return error_mark_node;
if ((cn = patch_string (nn)))
nn = cn;
TREE_OPERAND (node, 0) = nn;
}
if (TREE_CODE (node) != PLUS_EXPR || !JSTRING_P (wfl_op2))
{
nn = java_complete_tree (wfl_op2);
if (nn == error_mark_node)
return error_mark_node;
if ((cn = patch_string (nn)))
nn = cn;
TREE_OPERAND (node, 1) = nn;
}
return force_evaluation_order (patch_binop (node, wfl_op1, wfl_op2));
case INSTANCEOF_EXPR:
wfl_op1 = TREE_OPERAND (node, 0);
COMPLETE_CHECK_OP_0 (node);
if (flag_emit_xref)
{
TREE_TYPE (node) = boolean_type_node;
return node;
}
return patch_binop (node, wfl_op1, TREE_OPERAND (node, 1));
case UNARY_PLUS_EXPR:
case NEGATE_EXPR:
case TRUTH_NOT_EXPR:
case BIT_NOT_EXPR:
case PREDECREMENT_EXPR:
case PREINCREMENT_EXPR:
case POSTDECREMENT_EXPR:
case POSTINCREMENT_EXPR:
case CONVERT_EXPR:
/* There are cases were wfl_op1 is a WFL. patch_unaryop knows
how to handle those cases. */
wfl_op1 = TREE_OPERAND (node, 0);
CAN_COMPLETE_NORMALLY (node) = 1;
TREE_OPERAND (node, 0) = java_complete_tree (wfl_op1);
if (TREE_OPERAND (node, 0) == error_mark_node)
return error_mark_node;
node = patch_unaryop (node, wfl_op1);
CAN_COMPLETE_NORMALLY (node) = 1;
break;
case ARRAY_REF:
/* There are cases were wfl_op1 is a WFL. patch_array_ref knows
how to handle those cases. */
wfl_op1 = TREE_OPERAND (node, 0);
TREE_OPERAND (node, 0) = java_complete_tree (wfl_op1);
if (TREE_OPERAND (node, 0) == error_mark_node)
return error_mark_node;
if (!flag_emit_class_files && !flag_emit_xref)
TREE_OPERAND (node, 0) = save_expr (TREE_OPERAND (node, 0));
/* The same applies to wfl_op2 */
wfl_op2 = TREE_OPERAND (node, 1);
TREE_OPERAND (node, 1) = java_complete_tree (wfl_op2);
if (TREE_OPERAND (node, 1) == error_mark_node)
return error_mark_node;
if (!flag_emit_class_files && !flag_emit_xref)
TREE_OPERAND (node, 1) = save_expr (TREE_OPERAND (node, 1));
return patch_array_ref (node);
case RECORD_TYPE:
return node;;
case COMPONENT_REF:
/* The first step in the re-write of qualified name handling. FIXME.
So far, this is only to support PRIMTYPE.class -> PRIMCLASS.TYPE. */
TREE_OPERAND (node, 0) = java_complete_tree (TREE_OPERAND (node, 0));
if (TREE_CODE (TREE_OPERAND (node, 0)) == RECORD_TYPE)
{
tree name = TREE_OPERAND (node, 1);
tree field = lookup_field_wrapper (TREE_OPERAND (node, 0), name);
if (field == NULL_TREE)
{
error ("missing static field `%s'", IDENTIFIER_POINTER (name));
return error_mark_node;
}
if (! FIELD_STATIC (field))
{
error ("not a static field `%s'", IDENTIFIER_POINTER (name));
return error_mark_node;
}
return field;
}
else
fatal ("unimplemented java_complete_tree for COMPONENT_REF");
break;
case THIS_EXPR:
/* Can't use THIS in a static environment */
if (!current_this)
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context (wfl_operator, "Keyword `this' used outside "
"allowed context");
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
if (ctxp->explicit_constructor_p)
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context
(wfl_operator, "Can't reference `this' or `super' before the "
"superclass constructor has been called");
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
return current_this;
default:
CAN_COMPLETE_NORMALLY (node) = 1;
/* Ok: may be we have a STRING_CST or a crafted `StringBuffer'
and it's time to turn it into the appropriate String object
*/
if ((node = patch_string (node)))
return node;
fatal ("No case for tree code `%s' - java_complete_tree\n",
tree_code_name [TREE_CODE (node)]);
}
return node;
}
/* Complete function call's argument. Return a non zero value is an
error was found. */
static int
complete_function_arguments (node)
tree node;
{
int flag = 0;
tree cn;
ctxp->explicit_constructor_p += (CALL_THIS_CONSTRUCTOR_P (node) ? 1 : 0);
for (cn = TREE_OPERAND (node, 1); cn; cn = TREE_CHAIN (cn))
{
tree wfl = TREE_VALUE (cn), parm, temp;
parm = java_complete_tree (wfl);
if (parm == error_mark_node)
{
flag = 1;
continue;
}
/* If have a string literal that we haven't transformed yet or a
crafted string buffer, as a result of use of the the String
`+' operator. Build `parm.toString()' and expand it. */
if ((temp = patch_string (parm)))
parm = temp;
/* Inline PRIMTYPE.TYPE read access */
parm = maybe_build_primttype_type_ref (parm, wfl);
TREE_VALUE (cn) = parm;
}
ctxp->explicit_constructor_p -= (CALL_THIS_CONSTRUCTOR_P (node) ? 1 : 0);
return flag;
}
/* Sometimes (for loops and variable initialized during their
declaration), we want to wrap a statement around a WFL and turn it
debugable. */
static tree
build_debugable_stmt (location, stmt)
int location;
tree stmt;
{
if (TREE_CODE (stmt) != EXPR_WITH_FILE_LOCATION)
{
stmt = build_expr_wfl (stmt, input_filename, 0, 0);
EXPR_WFL_LINECOL (stmt) = location;
}
JAVA_MAYBE_GENERATE_DEBUG_INFO (stmt);
return stmt;
}
static tree
build_expr_block (body, decls)
tree body, decls;
{
tree node = make_node (BLOCK);
BLOCK_EXPR_DECLS (node) = decls;
BLOCK_EXPR_BODY (node) = body;
if (body)
TREE_TYPE (node) = TREE_TYPE (body);
TREE_SIDE_EFFECTS (node) = 1;
return node;
}
/* Create a new function block and link it approriately to current
function block chain */
static tree
enter_block ()
{
return (enter_a_block (build_expr_block (NULL_TREE, NULL_TREE)));
}
/* Link block B supercontext to the previous block. The current
function DECL is used as supercontext when enter_a_block is called
for the first time for a given function. The current function body
(DECL_FUNCTION_BODY) is set to be block B. */
static tree
enter_a_block (b)
tree b;
{
tree fndecl = current_function_decl;
if (!fndecl) {
BLOCK_SUPERCONTEXT (b) = current_static_block;
current_static_block = b;
}
else if (!DECL_FUNCTION_BODY (fndecl))
{
BLOCK_SUPERCONTEXT (b) = fndecl;
DECL_FUNCTION_BODY (fndecl) = b;
}
else
{
BLOCK_SUPERCONTEXT (b) = DECL_FUNCTION_BODY (fndecl);
DECL_FUNCTION_BODY (fndecl) = b;
}
return b;
}
/* Exit a block by changing the current function body
(DECL_FUNCTION_BODY) to the current block super context, only if
the block being exited isn't the method's top level one. */
static tree
exit_block ()
{
tree b;
if (current_function_decl)
{
b = DECL_FUNCTION_BODY (current_function_decl);
if (BLOCK_SUPERCONTEXT (b) != current_function_decl)
DECL_FUNCTION_BODY (current_function_decl) = BLOCK_SUPERCONTEXT (b);
}
else
{
b = current_static_block;
if (BLOCK_SUPERCONTEXT (b))
current_static_block = BLOCK_SUPERCONTEXT (b);
}
return b;
}
/* Lookup for NAME in the nested function's blocks, all the way up to
the current toplevel one. It complies with Java's local variable
scoping rules. */
static tree
lookup_name_in_blocks (name)
tree name;
{
tree b = GET_CURRENT_BLOCK (current_function_decl);
while (b != current_function_decl)
{
tree current;
/* Paranoid sanity check. To be removed */
if (TREE_CODE (b) != BLOCK)
fatal ("non block expr function body - lookup_name_in_blocks");
for (current = BLOCK_EXPR_DECLS (b); current;
current = TREE_CHAIN (current))
if (DECL_NAME (current) == name)
return current;
b = BLOCK_SUPERCONTEXT (b);
}
return NULL_TREE;
}
static void
maybe_absorb_scoping_blocks ()
{
while (BLOCK_EXPR_ORIGIN (GET_CURRENT_BLOCK (current_function_decl)))
{
tree b = exit_block ();
java_method_add_stmt (current_function_decl, b);
SOURCE_FRONTEND_DEBUG (("Absorbing scoping block at line %d", lineno));
}
}
/* This section of the source is reserved to build_* functions that
are building incomplete tree nodes and the patch_* functions that
are completing them. */
/* Build a super() constructor invocation. Returns empty_stmt_node if
we're currently dealing with the class java.lang.Object. */
static tree
build_super_invocation ()
{
if (current_class == object_type_node)
return empty_stmt_node;
else
{
tree super_wfl = build_wfl_node (super_identifier_node);
return build_method_invocation (super_wfl, NULL_TREE);
}
}
/* Build a SUPER/THIS qualified method invocation. */
static tree
build_this_super_qualified_invocation (use_this, name, args, lloc, rloc)
int use_this;
tree name, args;
int lloc, rloc;
{
tree invok;
tree wfl =
build_wfl_node (use_this ? this_identifier_node : super_identifier_node);
EXPR_WFL_LINECOL (wfl) = lloc;
invok = build_method_invocation (name, args);
return make_qualified_primary (wfl, invok, rloc);
}
/* Build an incomplete CALL_EXPR node. */
static tree
build_method_invocation (name, args)
tree name;
tree args;
{
tree call = build (CALL_EXPR, NULL_TREE, name, args, NULL_TREE);
TREE_SIDE_EFFECTS (call) = 1;
EXPR_WFL_LINECOL (call) = EXPR_WFL_LINECOL (name);
return call;
}
/* Build an incomplete new xxx(...) node. */
static tree
build_new_invocation (name, args)
tree name, args;
{
tree call = build (NEW_CLASS_EXPR, NULL_TREE, name, args, NULL_TREE);
TREE_SIDE_EFFECTS (call) = 1;
EXPR_WFL_LINECOL (call) = EXPR_WFL_LINECOL (name);
return call;
}
/* Build an incomplete assignment expression. */
static tree
build_assignment (op, op_location, lhs, rhs)
int op, op_location;
tree lhs, rhs;
{
tree assignment;
/* Build the corresponding binop if we deal with a Compound
Assignment operator. Mark the binop sub-tree as part of a
Compound Assignment expression */
if (op != ASSIGN_TK)
{
rhs = build_binop (BINOP_LOOKUP (op), op_location, lhs, rhs);
COMPOUND_ASSIGN_P (rhs) = 1;
}
assignment = build (MODIFY_EXPR, NULL_TREE, lhs, rhs);
TREE_SIDE_EFFECTS (assignment) = 1;
EXPR_WFL_LINECOL (assignment) = op_location;
return assignment;
}
/* Print an INTEGER_CST node in a static buffer, and return the buffer. */
char *
print_int_node (node)
tree node;
{
static char buffer [80];
if (TREE_CONSTANT_OVERFLOW (node))
sprintf (buffer, "<overflow>");
if (TREE_INT_CST_HIGH (node) == 0)
sprintf (buffer, HOST_WIDE_INT_PRINT_UNSIGNED,
TREE_INT_CST_LOW (node));
else if (TREE_INT_CST_HIGH (node) == -1
&& TREE_INT_CST_LOW (node) != 0)
{
buffer [0] = '-';
sprintf (&buffer [1], HOST_WIDE_INT_PRINT_UNSIGNED,
-TREE_INT_CST_LOW (node));
}
else
sprintf (buffer, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
TREE_INT_CST_HIGH (node), TREE_INT_CST_LOW (node));
return buffer;
}
/* Return 1 if an assignment to a FINAL is attempted in a non suitable
context. */
static int
check_final_assignment (lvalue, wfl)
tree lvalue, wfl;
{
if (JDECL_P (lvalue)
&& FIELD_FINAL (lvalue) && !IS_CLINIT (current_function_decl))
{
parse_error_context
(wfl, "Can't assign a value to the final variable `%s'",
IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl)));
return 1;
}
return 0;
}
/* Inline references to java.lang.PRIMTYPE.TYPE when accessed in
read. This is needed to avoid circularities in the implementation
of these fields in libjava. */
static tree
maybe_build_primttype_type_ref (rhs, wfl)
tree rhs, wfl;
{
tree to_return = NULL_TREE;
tree rhs_type = TREE_TYPE (rhs);
if (TREE_CODE (rhs) == COMPOUND_EXPR)
{
tree n = TREE_OPERAND (rhs, 1);
if (TREE_CODE (n) == VAR_DECL
&& DECL_NAME (n) == TYPE_identifier_node
&& rhs_type == class_ptr_type)
{
char *self_name = IDENTIFIER_POINTER (EXPR_WFL_NODE (wfl));
if (!strncmp (self_name, "java.lang.", 10))
to_return = build_primtype_type_ref (self_name);
}
}
return (to_return ? to_return : rhs );
}
/* 15.25 Assignment operators. */
static tree
patch_assignment (node, wfl_op1, wfl_op2)
tree node;
tree wfl_op1;
tree wfl_op2;
{
tree rhs = TREE_OPERAND (node, 1);
tree lvalue = TREE_OPERAND (node, 0), llvalue;
tree lhs_type, rhs_type, new_rhs = NULL_TREE;
int error_found = 0;
int lvalue_from_array = 0;
/* Can't assign to a final. */
if (check_final_assignment (lvalue, wfl_op1))
error_found = 1;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
/* Lhs can be a named variable */
if (JDECL_P (lvalue))
{
lhs_type = TREE_TYPE (lvalue);
}
/* Or Lhs can be a array acccess. Should that be lvalue ? FIXME +
comment on reason why */
else if (TREE_CODE (wfl_op1) == ARRAY_REF)
{
lhs_type = TREE_TYPE (lvalue);
lvalue_from_array = 1;
}
/* Or a field access */
else if (TREE_CODE (lvalue) == COMPONENT_REF)
lhs_type = TREE_TYPE (lvalue);
/* Or a function return slot */
else if (TREE_CODE (lvalue) == RESULT_DECL)
lhs_type = TREE_TYPE (lvalue);
/* Otherwise, we might want to try to write into an optimized static
final, this is an of a different nature, reported further on. */
else if (TREE_CODE (wfl_op1) == EXPR_WITH_FILE_LOCATION
&& resolve_expression_name (wfl_op1, &llvalue))
{
if (check_final_assignment (llvalue, wfl_op1))
{
/* What we should do instead is resetting the all the flags
previously set, exchange lvalue for llvalue and continue. */
error_found = 1;
return error_mark_node;
}
else
lhs_type = TREE_TYPE (lvalue);
}
else
{
parse_error_context (wfl_op1, "Invalid left hand side of assignment");
error_found = 1;
}
rhs_type = TREE_TYPE (rhs);
/* 5.1 Try the assignment conversion for builtin type. */
new_rhs = try_builtin_assignconv (wfl_op1, lhs_type, rhs);
/* 5.2 If it failed, try a reference conversion */
if (!new_rhs && (new_rhs = try_reference_assignconv (lhs_type, rhs)))
lhs_type = promote_type (rhs_type);
/* 15.25.2 If we have a compound assignment, convert RHS into the
type of the LHS */
else if (COMPOUND_ASSIGN_P (TREE_OPERAND (node, 1)))
new_rhs = convert (lhs_type, rhs);
/* Explicit cast required. This is an error */
if (!new_rhs)
{
char *t1 = strdup (lang_printable_name (TREE_TYPE (rhs), 0));
char *t2 = strdup (lang_printable_name (lhs_type, 0));
tree wfl;
char operation [32]; /* Max size known */
/* If the assignment is part of a declaration, we use the WFL of
the declared variable to point out the error and call it a
declaration problem. If the assignment is a genuine =
operator, we call is a operator `=' problem, otherwise we
call it an assignment problem. In both of these last cases,
we use the WFL of the operator to indicate the error. */
if (MODIFY_EXPR_FROM_INITIALIZATION_P (node))
{
wfl = wfl_op1;
strcpy (operation, "declaration");
}
else
{
wfl = wfl_operator;
if (COMPOUND_ASSIGN_P (TREE_OPERAND (node, 1)))
strcpy (operation, "assignment");
else if (TREE_CODE (TREE_OPERAND (node, 0)) == RESULT_DECL)
strcpy (operation, "`return'");
else
strcpy (operation, "`='");
}
parse_error_context
(wfl, (!valid_cast_to_p (rhs_type, lhs_type) ?
"Incompatible type for %s. Can't convert `%s' to `%s'" :
"Incompatible type for %s. Explicit cast "
"needed to convert `%s' to `%s'"), operation, t1, t2);
free (t1); free (t2);
error_found = 1;
}
/* Inline read access to java.lang.PRIMTYPE.TYPE */
if (new_rhs)
new_rhs = maybe_build_primttype_type_ref (new_rhs, wfl_op2);
if (error_found)
return error_mark_node;
/* 10.10: Array Store Exception runtime check */
if (!flag_emit_class_files
&& !flag_emit_xref
&& lvalue_from_array
&& JREFERENCE_TYPE_P (TYPE_ARRAY_ELEMENT (lhs_type))
&& !CLASS_FINAL (TYPE_NAME (GET_SKIP_TYPE (rhs_type))))
{
tree check;
tree base = lvalue;
/* We need to retrieve the right argument for _Jv_CheckArrayStore */
if (TREE_CODE (lvalue) == COMPOUND_EXPR)
base = TREE_OPERAND (lvalue, 0);
else
{
if (flag_bounds_check)
base = TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (base, 0), 1), 0);
else
base = TREE_OPERAND (TREE_OPERAND (base, 0), 0);
}
/* Build the invocation of _Jv_CheckArrayStore */
new_rhs = save_expr (new_rhs);
check = build (CALL_EXPR, void_type_node,
build_address_of (soft_checkarraystore_node),
tree_cons (NULL_TREE, base,
build_tree_list (NULL_TREE, new_rhs)),
NULL_TREE);
TREE_SIDE_EFFECTS (check) = 1;
/* We have to decide on an insertion point */
if (TREE_CODE (lvalue) == COMPOUND_EXPR)
{
tree t;
if (flag_bounds_check)
{
t = TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (lvalue, 1), 0), 0);
TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (lvalue, 1), 0), 0) =
build (COMPOUND_EXPR, void_type_node, t, check);
}
else
TREE_OPERAND (lvalue, 1) = build (COMPOUND_EXPR, lhs_type,
check, TREE_OPERAND (lvalue, 1));
}
else
{
/* Make sure the bound check will happen before the store check */
if (flag_bounds_check)
TREE_OPERAND (TREE_OPERAND (lvalue, 0), 0) =
build (COMPOUND_EXPR, void_type_node,
TREE_OPERAND (TREE_OPERAND (lvalue, 0), 0), check);
else
lvalue = build (COMPOUND_EXPR, lhs_type, check, lvalue);
}
}
TREE_OPERAND (node, 0) = lvalue;
TREE_OPERAND (node, 1) = new_rhs;
TREE_TYPE (node) = lhs_type;
return node;
}
/* Check that type SOURCE can be cast into type DEST. If the cast
can't occur at all, return 0 otherwise 1. This function is used to
produce accurate error messages on the reasons why an assignment
failed. */
static tree
try_reference_assignconv (lhs_type, rhs)
tree lhs_type, rhs;
{
tree new_rhs = NULL_TREE;
tree rhs_type = TREE_TYPE (rhs);
if (!JPRIMITIVE_TYPE_P (rhs_type) && JREFERENCE_TYPE_P (lhs_type))
{
/* `null' may be assigned to any reference type */
if (rhs == null_pointer_node)
new_rhs = null_pointer_node;
/* Try the reference assignment conversion */
else if (valid_ref_assignconv_cast_p (rhs_type, lhs_type, 0))
new_rhs = rhs;
/* This is a magic assignment that we process differently */
else if (rhs == soft_exceptioninfo_call_node)
new_rhs = rhs;
}
return new_rhs;
}
/* Check that RHS can be converted into LHS_TYPE by the assignment
conversion (5.2), for the cases of RHS being a builtin type. Return
NULL_TREE if the conversion fails or if because RHS isn't of a
builtin type. Return a converted RHS if the conversion is possible. */
static tree
try_builtin_assignconv (wfl_op1, lhs_type, rhs)
tree wfl_op1, lhs_type, rhs;
{
tree new_rhs = NULL_TREE;
tree rhs_type = TREE_TYPE (rhs);
/* Zero accepted everywhere */
if (TREE_CODE (rhs) == INTEGER_CST
&& TREE_INT_CST_HIGH (rhs) == 0 && TREE_INT_CST_LOW (rhs) == 0
&& JPRIMITIVE_TYPE_P (rhs_type))
new_rhs = convert (lhs_type, rhs);
/* 5.1.1 Try Identity Conversion,
5.1.2 Try Widening Primitive Conversion */
else if (valid_builtin_assignconv_identity_widening_p (lhs_type, rhs_type))
new_rhs = convert (lhs_type, rhs);
/* Try a narrowing primitive conversion (5.1.3):
- expression is a constant expression of type int AND
- variable is byte, short or char AND
- The value of the expression is representable in the type of the
variable */
else if (rhs_type == int_type_node && TREE_CONSTANT (rhs)
&& (lhs_type == byte_type_node || lhs_type == char_type_node
|| lhs_type == short_type_node))
{
if (int_fits_type_p (rhs, lhs_type))
new_rhs = convert (lhs_type, rhs);
else if (wfl_op1) /* Might be called with a NULL */
parse_warning_context
(wfl_op1, "Constant expression `%s' to wide for narrowing "
"primitive conversion to `%s'",
print_int_node (rhs), lang_printable_name (lhs_type, 0));
/* Reported a warning that will turn into an error further
down, so we don't return */
}
return new_rhs;
}
/* Return 1 if RHS_TYPE can be converted to LHS_TYPE by identity
conversion (5.1.1) or widening primitve conversion (5.1.2). Return
0 is the conversion test fails. This implements parts the method
invocation convertion (5.3). */
static int
valid_builtin_assignconv_identity_widening_p (lhs_type, rhs_type)
tree lhs_type, rhs_type;
{
/* 5.1.1: This is the identity conversion part. */
if (lhs_type == rhs_type)
return 1;
/* Reject non primitive types */
if (!JPRIMITIVE_TYPE_P (lhs_type) || !JPRIMITIVE_TYPE_P (rhs_type))
return 0;
/* 5.1.2: widening primitive conversion. byte, even if it's smaller
than a char can't be converted into a char. Short can't too, but
the < test below takes care of that */
if (lhs_type == char_type_node && rhs_type == byte_type_node)
return 0;
/* Accept all promoted type here. Note, we can't use <= in the test
below, because we still need to bounce out assignments of short
to char and the likes */
if (lhs_type == int_type_node
&& (rhs_type == promoted_byte_type_node
|| rhs_type == promoted_short_type_node
|| rhs_type == promoted_char_type_node
|| rhs_type == promoted_boolean_type_node))
return 1;
/* From here, an integral is widened if its precision is smaller
than the precision of the LHS or if the LHS is a floating point
type, or the RHS is a float and the RHS a double. */
if ((JINTEGRAL_TYPE_P (rhs_type) && JINTEGRAL_TYPE_P (lhs_type)
&& (TYPE_PRECISION (rhs_type) < TYPE_PRECISION (lhs_type)))
|| (JINTEGRAL_TYPE_P (rhs_type) && JFLOAT_TYPE_P (lhs_type))
|| (rhs_type == float_type_node && lhs_type == double_type_node))
return 1;
return 0;
}
/* Check that something of SOURCE type can be assigned or cast to
something of DEST type at runtime. Return 1 if the operation is
valid, 0 otherwise. If CAST is set to 1, we're treating the case
were SOURCE is cast into DEST, which borrows a lot of the
assignment check. */
static int
valid_ref_assignconv_cast_p (source, dest, cast)
tree source;
tree dest;
int cast;
{
/* SOURCE or DEST might be null if not from a declared entity. */
if (!source || !dest)
return 0;
if (JNULLP_TYPE_P (source))
return 1;
if (TREE_CODE (source) == POINTER_TYPE)
source = TREE_TYPE (source);
if (TREE_CODE (dest) == POINTER_TYPE)
dest = TREE_TYPE (dest);
/* Case where SOURCE is a class type */
if (TYPE_CLASS_P (source))
{
if (TYPE_CLASS_P (dest))
return source == dest || inherits_from_p (source, dest)
|| (cast && inherits_from_p (dest, source));
if (TYPE_INTERFACE_P (dest))
{
/* If doing a cast and SOURCE is final, the operation is
always correct a compile time (because even if SOURCE
does not implement DEST, a subclass of SOURCE might). */
if (cast && !CLASS_FINAL (TYPE_NAME (source)))
return 1;
/* Otherwise, SOURCE must implement DEST */
return interface_of_p (dest, source);
}
/* DEST is an array, cast permited if SOURCE is of Object type */
return (cast && source == object_type_node ? 1 : 0);
}
if (TYPE_INTERFACE_P (source))
{
if (TYPE_CLASS_P (dest))
{
/* If not casting, DEST must be the Object type */
if (!cast)
return dest == object_type_node;
/* We're doing a cast. The cast is always valid is class
DEST is not final, otherwise, DEST must implement SOURCE */
else if (!CLASS_FINAL (TYPE_NAME (dest)))
return 1;
else
return interface_of_p (source, dest);
}
if (TYPE_INTERFACE_P (dest))
{
/* If doing a cast, then if SOURCE and DEST contain method
with the same signature but different return type, then
this is a (compile time) error */
if (cast)
{
tree method_source, method_dest;
tree source_type;
tree source_sig;
tree source_name;
for (method_source = TYPE_METHODS (source); method_source;
method_source = TREE_CHAIN (method_source))
{
source_sig =
build_java_argument_signature (TREE_TYPE (method_source));
source_type = TREE_TYPE (TREE_TYPE (method_source));
source_name = DECL_NAME (method_source);
for (method_dest = TYPE_METHODS (dest);
method_dest; method_dest = TREE_CHAIN (method_dest))
if (source_sig ==
build_java_argument_signature (TREE_TYPE (method_dest))
&& source_name == DECL_NAME (method_dest)
&& source_type != TREE_TYPE (TREE_TYPE (method_dest)))
return 0;
}
return 1;
}
else
return source == dest || interface_of_p (dest, source);
}
else /* Array */
return (cast ?
(DECL_NAME (TYPE_NAME (source)) == java_lang_cloneable) : 0);
}
if (TYPE_ARRAY_P (source))
{
if (TYPE_CLASS_P (dest))
return dest == object_type_node;
/* Can't cast an array to an interface unless the interface is
java.lang.Cloneable */
if (TYPE_INTERFACE_P (dest))
return (DECL_NAME (TYPE_NAME (dest)) == java_lang_cloneable ? 1 : 0);
else /* Arrays */
{
tree source_element_type = TYPE_ARRAY_ELEMENT (source);
tree dest_element_type = TYPE_ARRAY_ELEMENT (dest);
/* In case of severe errors, they turn out null */
if (!dest_element_type || !source_element_type)
return 0;
if (source_element_type == dest_element_type)
return 1;
return valid_ref_assignconv_cast_p (source_element_type,
dest_element_type, cast);
}
return 0;
}
return 0;
}
static int
valid_cast_to_p (source, dest)
tree source;
tree dest;
{
if (TREE_CODE (source) == POINTER_TYPE)
source = TREE_TYPE (source);
if (TREE_CODE (dest) == POINTER_TYPE)
dest = TREE_TYPE (dest);
if (TREE_CODE (source) == RECORD_TYPE && TREE_CODE (dest) == RECORD_TYPE)
return valid_ref_assignconv_cast_p (source, dest, 1);
else if (JNUMERIC_TYPE_P (source) && JNUMERIC_TYPE_P (dest))
return 1;
return 0;
}
/* Method invocation conversion test. Return 1 if type SOURCE can be
converted to type DEST through the methond invocation conversion
process (5.3) */
static tree
do_unary_numeric_promotion (arg)
tree arg;
{
tree type = TREE_TYPE (arg);
if (TREE_CODE (type) == INTEGER_TYPE ? TYPE_PRECISION (type) < 32
: TREE_CODE (type) == CHAR_TYPE)
arg = convert (int_type_node, arg);
return arg;
}
/* Return a non zero value if SOURCE can be converted into DEST using
the method invocation conversion rule (5.3). */
static int
valid_method_invocation_conversion_p (dest, source)
tree dest, source;
{
return ((JPRIMITIVE_TYPE_P (source) && JPRIMITIVE_TYPE_P (dest)
&& valid_builtin_assignconv_identity_widening_p (dest, source))
|| ((JREFERENCE_TYPE_P (source) || JNULLP_TYPE_P (source))
&& (JREFERENCE_TYPE_P (dest) || JNULLP_TYPE_P (dest))
&& valid_ref_assignconv_cast_p (source, dest, 0)));
}
/* Build an incomplete binop expression. */
static tree
build_binop (op, op_location, op1, op2)
enum tree_code op;
int op_location;
tree op1, op2;
{
tree binop = build (op, NULL_TREE, op1, op2);
TREE_SIDE_EFFECTS (binop) = 1;
/* Store the location of the operator, for better error report. The
string of the operator will be rebuild based on the OP value. */
EXPR_WFL_LINECOL (binop) = op_location;
return binop;
}
/* Build the string of the operator retained by NODE. If NODE is part
of a compound expression, add an '=' at the end of the string. This
function is called when an error needs to be reported on an
operator. The string is returned as a pointer to a static character
buffer. */
static char *
operator_string (node)
tree node;
{
#define BUILD_OPERATOR_STRING(S) \
{ \
sprintf (buffer, "%s%s", S, (COMPOUND_ASSIGN_P (node) ? "=" : "")); \
return buffer; \
}
static char buffer [10];
switch (TREE_CODE (node))
{
case MULT_EXPR: BUILD_OPERATOR_STRING ("*");
case RDIV_EXPR: BUILD_OPERATOR_STRING ("/");
case TRUNC_MOD_EXPR: BUILD_OPERATOR_STRING ("%");
case PLUS_EXPR: BUILD_OPERATOR_STRING ("+");
case MINUS_EXPR: BUILD_OPERATOR_STRING ("-");
case LSHIFT_EXPR: BUILD_OPERATOR_STRING ("<<");
case RSHIFT_EXPR: BUILD_OPERATOR_STRING (">>");
case URSHIFT_EXPR: BUILD_OPERATOR_STRING (">>>");
case BIT_AND_EXPR: BUILD_OPERATOR_STRING ("&");
case BIT_XOR_EXPR: BUILD_OPERATOR_STRING ("^");
case BIT_IOR_EXPR: BUILD_OPERATOR_STRING ("|");
case TRUTH_ANDIF_EXPR: BUILD_OPERATOR_STRING ("&&");
case TRUTH_ORIF_EXPR: BUILD_OPERATOR_STRING ("||");
case EQ_EXPR: BUILD_OPERATOR_STRING ("==");
case NE_EXPR: BUILD_OPERATOR_STRING ("!=");
case GT_EXPR: BUILD_OPERATOR_STRING (">");
case GE_EXPR: BUILD_OPERATOR_STRING (">=");
case LT_EXPR: BUILD_OPERATOR_STRING ("<");
case LE_EXPR: BUILD_OPERATOR_STRING ("<=");
case UNARY_PLUS_EXPR: BUILD_OPERATOR_STRING ("+");
case NEGATE_EXPR: BUILD_OPERATOR_STRING ("-");
case TRUTH_NOT_EXPR: BUILD_OPERATOR_STRING ("!");
case BIT_NOT_EXPR: BUILD_OPERATOR_STRING ("~");
case PREINCREMENT_EXPR: /* Fall through */
case POSTINCREMENT_EXPR: BUILD_OPERATOR_STRING ("++");
case PREDECREMENT_EXPR: /* Fall through */
case POSTDECREMENT_EXPR: BUILD_OPERATOR_STRING ("--");
default:
fatal ("unregistered operator %s - operator_string",
tree_code_name [TREE_CODE (node)]);
}
return NULL;
#undef BUILD_OPERATOR_STRING
}
/* Binary operators (15.16 up to 15.18). We return error_mark_node on
errors but we modify NODE so that it contains the type computed
according to the expression, when it's fixed. Otherwise, we write
error_mark_node as the type. It allows us to further the analysis
of remaining nodes and detects more errors in certain cases. */
static tree
patch_binop (node, wfl_op1, wfl_op2)
tree node;
tree wfl_op1;
tree wfl_op2;
{
tree op1 = TREE_OPERAND (node, 0);
tree op2 = TREE_OPERAND (node, 1);
tree op1_type = TREE_TYPE (op1);
tree op2_type = TREE_TYPE (op2);
tree prom_type = NULL_TREE;
int code = TREE_CODE (node);
/* If 1, tell the routine that we have to return error_mark_node
after checking for the initialization of the RHS */
int error_found = 0;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
switch (code)
{
/* 15.16 Multiplicative operators */
case MULT_EXPR: /* 15.16.1 Multiplication Operator * */
case RDIV_EXPR: /* 15.16.2 Division Operator / */
case TRUNC_MOD_EXPR: /* 15.16.3 Remainder operator % */
if (!JPRIMITIVE_TYPE_P (op1_type) || !JPRIMITIVE_TYPE_P (op2_type))
{
if (!JPRIMITIVE_TYPE_P (op1_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op1_type);
if (!JPRIMITIVE_TYPE_P (op2_type) && (op1_type != op2_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op2_type);
TREE_TYPE (node) = error_mark_node;
error_found = 1;
break;
}
prom_type = binary_numeric_promotion (op1_type, op2_type, &op1, &op2);
/* Change the division operator if necessary */
if (code == RDIV_EXPR && TREE_CODE (prom_type) == INTEGER_TYPE)
TREE_SET_CODE (node, TRUNC_DIV_EXPR);
/* This one is more complicated. FLOATs are processed by a
function call to soft_fmod. Duplicate the value of the
COMPOUND_ASSIGN_P flag. */
if (code == TRUNC_MOD_EXPR)
{
tree mod = build_java_binop (TRUNC_MOD_EXPR, prom_type, op1, op2);
COMPOUND_ASSIGN_P (mod) = COMPOUND_ASSIGN_P (node);
TREE_SIDE_EFFECTS (mod)
= TREE_SIDE_EFFECTS (op1) | TREE_SIDE_EFFECTS (op2);
return mod;
}
break;
/* 15.17 Additive Operators */
case PLUS_EXPR: /* 15.17.1 String Concatenation Operator + */
/* Operation is valid if either one argument is a string
constant, a String object or a StringBuffer crafted for the
purpose of the a previous usage of the String concatenation
operator */
if (TREE_CODE (op1) == STRING_CST
|| TREE_CODE (op2) == STRING_CST
|| JSTRING_TYPE_P (op1_type)
|| JSTRING_TYPE_P (op2_type)
|| IS_CRAFTED_STRING_BUFFER_P (op1)
|| IS_CRAFTED_STRING_BUFFER_P (op2))
return build_string_concatenation (op1, op2);
case MINUS_EXPR: /* 15.17.2 Additive Operators (+ and -) for
Numeric Types */
if (!JPRIMITIVE_TYPE_P (op1_type) || !JPRIMITIVE_TYPE_P (op2_type))
{
if (!JPRIMITIVE_TYPE_P (op1_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op1_type);
if (!JPRIMITIVE_TYPE_P (op2_type) && (op1_type != op2_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op2_type);
TREE_TYPE (node) = error_mark_node;
error_found = 1;
break;
}
prom_type = binary_numeric_promotion (op1_type, op2_type, &op1, &op2);
break;
/* 15.18 Shift Operators */
case LSHIFT_EXPR:
case RSHIFT_EXPR:
case URSHIFT_EXPR:
if (!JINTEGRAL_TYPE_P (op1_type) || !JINTEGRAL_TYPE_P (op2_type))
{
if (!JINTEGRAL_TYPE_P (op1_type))
ERROR_CAST_NEEDED_TO_INTEGRAL (wfl_operator, node, op1_type);
else
parse_error_context
(wfl_operator, (JPRIMITIVE_TYPE_P (op2_type) ?
"Incompatible type for `%s'. Explicit cast needed to convert "
"shift distance from `%s' to integral" :
"Incompatible type for `%s'. Can't convert shift distance from "
"`%s' to integral"),
operator_string (node), lang_printable_name (op2_type, 0));
TREE_TYPE (node) = error_mark_node;
error_found = 1;
break;
}
/* Unary numeric promotion (5.6.1) is performed on each operand
separatly */
op1 = do_unary_numeric_promotion (op1);
op2 = do_unary_numeric_promotion (op2);
/* The type of the shift expression is the type of the promoted
type of the left-hand operand */
prom_type = TREE_TYPE (op1);
/* Shift int only up to 0x1f and long up to 0x3f */
if (prom_type == int_type_node)
op2 = fold (build (BIT_AND_EXPR, int_type_node, op2,
build_int_2 (0x1f, 0)));
else
op2 = fold (build (BIT_AND_EXPR, int_type_node, op2,
build_int_2 (0x3f, 0)));
/* The >>> operator is a >> operating on unsigned quantities */
if (code == URSHIFT_EXPR && ! flag_emit_class_files)
{
tree to_return;
tree utype = unsigned_type (prom_type);
op1 = convert (utype, op1);
TREE_SET_CODE (node, RSHIFT_EXPR);
TREE_OPERAND (node, 0) = op1;
TREE_OPERAND (node, 1) = op2;
TREE_TYPE (node) = utype;
to_return = convert (prom_type, node);
/* Copy the original value of the COMPOUND_ASSIGN_P flag */
COMPOUND_ASSIGN_P (to_return) = COMPOUND_ASSIGN_P (node);
TREE_SIDE_EFFECTS (to_return)
= TREE_SIDE_EFFECTS (op1) | TREE_SIDE_EFFECTS (op2);
return to_return;
}
break;
/* 15.19.1 Type Comparison Operator instaceof */
case INSTANCEOF_EXPR:
TREE_TYPE (node) = boolean_type_node;
if (!(op2_type = resolve_type_during_patch (op2)))
return error_mark_node;
/* The first operand must be a reference type or the null type */
if (!JREFERENCE_TYPE_P (op1_type) && op1 != null_pointer_node)
error_found = 1; /* Error reported further below */
/* The second operand must be a reference type */
if (!JREFERENCE_TYPE_P (op2_type))
{
SET_WFL_OPERATOR (wfl_operator, node, wfl_op2);
parse_error_context
(wfl_operator, "Invalid argument `%s' for `instanceof'",
lang_printable_name (op2_type, 0));
error_found = 1;
}
if (!error_found && valid_ref_assignconv_cast_p (op1_type, op2_type, 1))
{
/* If the first operand is null, the result is always false */
if (op1 == null_pointer_node)
return boolean_false_node;
else if (flag_emit_class_files)
{
TREE_OPERAND (node, 1) = op2_type;
TREE_SIDE_EFFECTS (node) = TREE_SIDE_EFFECTS (op1);
return node;
}
/* Otherwise we have to invoke instance of to figure it out */
else
{
tree call =
build (CALL_EXPR, boolean_type_node,
build_address_of (soft_instanceof_node),
tree_cons
(NULL_TREE, op1,
build_tree_list (NULL_TREE,
build_class_ref (op2_type))),
NULL_TREE);
TREE_SIDE_EFFECTS (call) = TREE_SIDE_EFFECTS (op1);
return call;
}
}
/* There is no way the expression operand can be an instance of
the type operand. This is a compile time error. */
else
{
char *t1 = strdup (lang_printable_name (op1_type, 0));
SET_WFL_OPERATOR (wfl_operator, node, wfl_op1);
parse_error_context
(wfl_operator, "Impossible for `%s' to be instance of `%s'",
t1, lang_printable_name (op2_type, 0));
free (t1);
error_found = 1;
}
break;
/* 15.21 Bitwise and Logical Operators */
case BIT_AND_EXPR:
case BIT_XOR_EXPR:
case BIT_IOR_EXPR:
if (JINTEGRAL_TYPE_P (op1_type) && JINTEGRAL_TYPE_P (op2_type))
/* Binary numeric promotion is performed on both operand and the
expression retain that type */
prom_type = binary_numeric_promotion (op1_type, op2_type, &op1, &op2);
else if (TREE_CODE (op1_type) == BOOLEAN_TYPE
&& TREE_CODE (op1_type) == BOOLEAN_TYPE)
/* The type of the bitwise operator expression is BOOLEAN */
prom_type = boolean_type_node;
else
{
if (!JINTEGRAL_TYPE_P (op1_type))
ERROR_CAST_NEEDED_TO_INTEGRAL (wfl_operator, node, op1_type);
if (!JINTEGRAL_TYPE_P (op2_type) && (op1_type != op2_type))
ERROR_CAST_NEEDED_TO_INTEGRAL (wfl_operator, node, op2_type);
TREE_TYPE (node) = error_mark_node;
error_found = 1;
/* Insert a break here if adding thing before the switch's
break for this case */
}
break;
/* 15.22 Conditional-And Operator */
case TRUTH_ANDIF_EXPR:
/* 15.23 Conditional-Or Operator */
case TRUTH_ORIF_EXPR:
/* Operands must be of BOOLEAN type */
if (TREE_CODE (op1_type) != BOOLEAN_TYPE ||
TREE_CODE (op2_type) != BOOLEAN_TYPE)
{
if (TREE_CODE (op1_type) != BOOLEAN_TYPE)
ERROR_CANT_CONVERT_TO_BOOLEAN (wfl_operator, node, op1_type);
if (TREE_CODE (op2_type) != BOOLEAN_TYPE && (op1_type != op2_type))
ERROR_CANT_CONVERT_TO_BOOLEAN (wfl_operator, node, op2_type);
TREE_TYPE (node) = boolean_type_node;
error_found = 1;
break;
}
/* The type of the conditional operators is BOOLEAN */
prom_type = boolean_type_node;
break;
/* 15.19.1 Numerical Comparison Operators <, <=, >, >= */
case LT_EXPR:
case GT_EXPR:
case LE_EXPR:
case GE_EXPR:
/* The type of each of the operands must be a primitive numeric
type */
if (!JNUMERIC_TYPE_P (op1_type) || ! JNUMERIC_TYPE_P (op2_type))
{
if (!JNUMERIC_TYPE_P (op1_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op1_type);
if (!JNUMERIC_TYPE_P (op2_type) && (op1_type != op2_type))
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op2_type);
TREE_TYPE (node) = boolean_type_node;
error_found = 1;
break;
}
/* Binary numeric promotion is performed on the operands */
binary_numeric_promotion (op1_type, op2_type, &op1, &op2);
/* The type of the relation expression is always BOOLEAN */
prom_type = boolean_type_node;
break;
/* 15.20 Equality Operator */
case EQ_EXPR:
case NE_EXPR:
/* 15.20.1 Numerical Equality Operators == and != */
/* Binary numeric promotion is performed on the operands */
if (JNUMERIC_TYPE_P (op1_type) && JNUMERIC_TYPE_P (op2_type))
binary_numeric_promotion (op1_type, op2_type, &op1, &op2);
/* 15.20.2 Boolean Equality Operators == and != */
else if (TREE_CODE (op1_type) == BOOLEAN_TYPE &&
TREE_CODE (op2_type) == BOOLEAN_TYPE)
; /* Nothing to do here */
/* 15.20.3 Reference Equality Operators == and != */
/* Types have to be either references or the null type. If
they're references, it must be possible to convert either
type to the other by casting conversion. */
else if (op1 == null_pointer_node || op2 == null_pointer_node
|| (JREFERENCE_TYPE_P (op1_type) && JREFERENCE_TYPE_P (op2_type)
&& (valid_ref_assignconv_cast_p (op1_type, op2_type, 1)
|| valid_ref_assignconv_cast_p (op2_type,
op1_type, 1))))
; /* Nothing to do here */
/* Else we have an error figure what can't be converted into
what and report the error */
else
{
char *t1;
t1 = strdup (lang_printable_name (op1_type, 0));
parse_error_context
(wfl_operator, "Incompatible type for `%s'. Can't convert `%s' "
"to `%s'", operator_string (node), t1,
lang_printable_name (op2_type, 0));
free (t1);
TREE_TYPE (node) = boolean_type_node;
error_found = 1;
break;
}
prom_type = boolean_type_node;
break;
}
if (error_found)
return error_mark_node;
TREE_OPERAND (node, 0) = op1;
TREE_OPERAND (node, 1) = op2;
TREE_TYPE (node) = prom_type;
TREE_SIDE_EFFECTS (node) = TREE_SIDE_EFFECTS (op1) | TREE_SIDE_EFFECTS (op2);
if (flag_emit_xref)
return node;
/* fold does not respect side-effect order as required for Java but not C.
* Also, it sometimes create SAVE_EXPRs which are bad when emitting
* bytecode.
*/
if (flag_emit_class_files ? (TREE_CONSTANT (op1) && TREE_CONSTANT (op2))
: ! TREE_SIDE_EFFECTS (node))
node = fold (node);
return node;
}
/* Concatenate the STRING_CST CSTE and STRING. When AFTER is a non
zero value, the value of CSTE comes after the valude of STRING */
static tree
do_merge_string_cste (cste, string, string_len, after)
tree cste;
char *string;
int string_len, after;
{
int len = TREE_STRING_LENGTH (cste) + string_len;
char *old = TREE_STRING_POINTER (cste);
TREE_STRING_LENGTH (cste) = len;
TREE_STRING_POINTER (cste) = obstack_alloc (expression_obstack, len+1);
if (after)
{
strcpy (TREE_STRING_POINTER (cste), string);
strcat (TREE_STRING_POINTER (cste), old);
}
else
{
strcpy (TREE_STRING_POINTER (cste), old);
strcat (TREE_STRING_POINTER (cste), string);
}
return cste;
}
/* Tries to merge OP1 (a STRING_CST) and OP2 (if suitable). Return a
new STRING_CST on success, NULL_TREE on failure */
static tree
merge_string_cste (op1, op2, after)
tree op1, op2;
int after;
{
/* Handle two string constants right away */
if (TREE_CODE (op2) == STRING_CST)
return do_merge_string_cste (op1, TREE_STRING_POINTER (op2),
TREE_STRING_LENGTH (op2), after);
/* Reasonable integer constant can be treated right away */
if (TREE_CODE (op2) == INTEGER_CST && !TREE_CONSTANT_OVERFLOW (op2))
{
static char *boolean_true = "true";
static char *boolean_false = "false";
static char *null_pointer = "null";
char ch[3];
char *string;
if (op2 == boolean_true_node)
string = boolean_true;
else if (op2 == boolean_false_node)
string = boolean_false;
else if (op2 == null_pointer_node)
string = null_pointer;
else if (TREE_TYPE (op2) == char_type_node)
{
ch[0] = (char )TREE_INT_CST_LOW (op2);
ch[1] = '\0';
string = ch;
}
else
string = print_int_node (op2);
return do_merge_string_cste (op1, string, strlen (string), after);
}
return NULL_TREE;
}
/* Tries to statically concatenate OP1 and OP2 if possible. Either one
has to be a STRING_CST and the other part must be a STRING_CST or a
INTEGRAL constant. Return a new STRING_CST if the operation
succeed, NULL_TREE otherwise.
If the case we want to optimize for space, we might want to return
NULL_TREE for each invocation of this routine. FIXME */
static tree
string_constant_concatenation (op1, op2)
tree op1, op2;
{
if (TREE_CODE (op1) == STRING_CST || (TREE_CODE (op2) == STRING_CST))
{
tree string, rest;
int invert;
string = (TREE_CODE (op1) == STRING_CST ? op1 : op2);
rest = (string == op1 ? op2 : op1);
invert = (string == op1 ? 0 : 1 );
/* Walk REST, only if it looks reasonable */
if (TREE_CODE (rest) != STRING_CST
&& !IS_CRAFTED_STRING_BUFFER_P (rest)
&& !JSTRING_TYPE_P (TREE_TYPE (rest))
&& TREE_CODE (rest) == EXPR_WITH_FILE_LOCATION)
{
rest = java_complete_tree (rest);
if (rest == error_mark_node)
return error_mark_node;
rest = fold (rest);
}
return merge_string_cste (string, rest, invert);
}
return NULL_TREE;
}
/* Implement the `+' operator. Does static optimization if possible,
otherwise create (if necessary) and append elements to a
StringBuffer. The StringBuffer will be carried around until it is
used for a function call or an assignment. Then toString() will be
called on it to turn it into a String object. */
static tree
build_string_concatenation (op1, op2)
tree op1, op2;
{
tree result;
int side_effects = TREE_SIDE_EFFECTS (op1) | TREE_SIDE_EFFECTS (op2);
if (flag_emit_xref)
return build (PLUS_EXPR, string_type_node, op1, op2);
/* Try to do some static optimization */
if ((result = string_constant_concatenation (op1, op2)))
return result;
/* Discard empty strings on either side of the expression */
if (TREE_CODE (op1) == STRING_CST && TREE_STRING_LENGTH (op1) == 0)
{
op1 = op2;
op2 = NULL_TREE;
}
else if (TREE_CODE (op2) == STRING_CST && TREE_STRING_LENGTH (op2) == 0)
op2 = NULL_TREE;
/* If operands are string constant, turn then into object references */
if (TREE_CODE (op1) == STRING_CST)
op1 = patch_string_cst (op1);
if (op2 && TREE_CODE (op2) == STRING_CST)
op2 = patch_string_cst (op2);
/* If either one of the constant is null and the other non null
operand is a String object, return it. */
if (JSTRING_TYPE_P (TREE_TYPE (op1)) && !op2)
return op1;
/* If OP1 isn't already a StringBuffer, create and
initialize a new one */
if (!IS_CRAFTED_STRING_BUFFER_P (op1))
{
/* Two solutions here:
1) OP1 is a string reference, we call new StringBuffer(OP1)
2) OP1 is something else, we call new StringBuffer().append(OP1). */
if (JSTRING_TYPE_P (TREE_TYPE (op1)))
op1 = BUILD_STRING_BUFFER (op1);
else
{
tree aNew = BUILD_STRING_BUFFER (NULL_TREE);
op1 = make_qualified_primary (aNew, BUILD_APPEND (op1), 0);
}
}
if (op2)
{
/* OP1 is no longer the last node holding a crafted StringBuffer */
IS_CRAFTED_STRING_BUFFER_P (op1) = 0;
/* Create a node for `{new...,xxx}.append (op2)' */
if (op2)
op1 = make_qualified_primary (op1, BUILD_APPEND (op2), 0);
}
/* Mark the last node holding a crafted StringBuffer */
IS_CRAFTED_STRING_BUFFER_P (op1) = 1;
TREE_SIDE_EFFECTS (op1) = side_effects;
return op1;
}
/* Patch the string node NODE. NODE can be a STRING_CST of a crafted
StringBuffer. If no string were found to be patched, return
NULL. */
static tree
patch_string (node)
tree node;
{
if (node == error_mark_node)
return error_mark_node;
if (TREE_CODE (node) == STRING_CST)
return patch_string_cst (node);
else if (IS_CRAFTED_STRING_BUFFER_P (node))
{
int saved = ctxp->explicit_constructor_p;
tree invoke = build_method_invocation (wfl_to_string, NULL_TREE);
tree ret;
/* Temporary disable forbid the use of `this'. */
ctxp->explicit_constructor_p = 0;
ret = java_complete_tree (make_qualified_primary (node, invoke, 0));
/* Restore it at its previous value */
ctxp->explicit_constructor_p = saved;
return ret;
}
return NULL_TREE;
}
/* Build the internal representation of a string constant. */
static tree
patch_string_cst (node)
tree node;
{
int location;
if (! flag_emit_class_files)
{
push_obstacks (&permanent_obstack, &permanent_obstack);
node = get_identifier (TREE_STRING_POINTER (node));
location = alloc_name_constant (CONSTANT_String, node);
node = build_ref_from_constant_pool (location);
}
TREE_TYPE (node) = string_ptr_type_node;
TREE_CONSTANT (node) = 1;
return node;
}
/* Build an incomplete unary operator expression. */
static tree
build_unaryop (op_token, op_location, op1)
int op_token, op_location;
tree op1;
{
enum tree_code op;
tree unaryop;
switch (op_token)
{
case PLUS_TK: op = UNARY_PLUS_EXPR; break;
case MINUS_TK: op = NEGATE_EXPR; break;
case NEG_TK: op = TRUTH_NOT_EXPR; break;
case NOT_TK: op = BIT_NOT_EXPR; break;
default: fatal ("Unknown token `%d' for unary operator - build_unaryop",
op_token);
}
unaryop = build1 (op, NULL_TREE, op1);
TREE_SIDE_EFFECTS (unaryop) = 1;
/* Store the location of the operator, for better error report. The
string of the operator will be rebuild based on the OP value. */
EXPR_WFL_LINECOL (unaryop) = op_location;
return unaryop;
}
/* Special case for the ++/-- operators, since they require an extra
argument to build, which is set to NULL and patched
later. IS_POST_P is 1 if the operator, 0 otherwise. */
static tree
build_incdec (op_token, op_location, op1, is_post_p)
int op_token, op_location;
tree op1;
int is_post_p;
{
static enum tree_code lookup [2][2] =
{
{ PREDECREMENT_EXPR, PREINCREMENT_EXPR, },
{ POSTDECREMENT_EXPR, POSTINCREMENT_EXPR, },
};
tree node = build (lookup [is_post_p][(op_token - DECR_TK)],
NULL_TREE, op1, NULL_TREE);
TREE_SIDE_EFFECTS (node) = 1;
/* Store the location of the operator, for better error report. The
string of the operator will be rebuild based on the OP value. */
EXPR_WFL_LINECOL (node) = op_location;
return node;
}
/* Build an incomplete cast operator, based on the use of the
CONVERT_EXPR. Note that TREE_TYPE of the constructed node is
set. java_complete_tree is trained to walk a CONVERT_EXPR even
though its type is already set. */
static tree
build_cast (location, type, exp)
int location;
tree type, exp;
{
tree node = build1 (CONVERT_EXPR, type, exp);
EXPR_WFL_LINECOL (node) = location;
return node;
}
/* 15.14 Unary operators. We return error_mark_node in case of error,
but preserve the type of NODE if the type is fixed. */
static tree
patch_unaryop (node, wfl_op)
tree node;
tree wfl_op;
{
tree op = TREE_OPERAND (node, 0);
tree op_type = TREE_TYPE (op);
tree prom_type = NULL_TREE, value, decl;
int code = TREE_CODE (node);
int error_found = 0;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
switch (code)
{
/* 15.13.2 Postfix Increment Operator ++ */
case POSTINCREMENT_EXPR:
/* 15.13.3 Postfix Increment Operator -- */
case POSTDECREMENT_EXPR:
/* 15.14.1 Prefix Increment Operator ++ */
case PREINCREMENT_EXPR:
/* 15.14.2 Prefix Decrement Operator -- */
case PREDECREMENT_EXPR:
decl = strip_out_static_field_access_decl (op);
/* We really should have a JAVA_ARRAY_EXPR to avoid this */
if (!JDECL_P (decl)
&& TREE_CODE (decl) != COMPONENT_REF
&& !(flag_emit_class_files && TREE_CODE (decl) == ARRAY_REF)
&& TREE_CODE (decl) != INDIRECT_REF
&& !(TREE_CODE (decl) == COMPOUND_EXPR
&& TREE_OPERAND (decl, 1)
&& (TREE_CODE (TREE_OPERAND (decl, 1)) == INDIRECT_REF)))
{
tree lvalue;
/* Before screaming, check that we're not in fact trying to
increment a optimized static final access, in which case
we issue an different error message. */
if (!(TREE_CODE (wfl_op) == EXPR_WITH_FILE_LOCATION
&& resolve_expression_name (wfl_op, &lvalue)
&& check_final_assignment (lvalue, wfl_op)))
parse_error_context (wfl_operator, "Invalid argument to `%s'",
operator_string (node));
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
else if (check_final_assignment (op, wfl_op))
error_found = 1;
/* From now on, we know that op if a variable and that it has a
valid wfl. We use wfl_op to locate errors related to the
++/-- operand. */
else if (!JNUMERIC_TYPE_P (op_type))
{
parse_error_context
(wfl_op, "Invalid argument type `%s' to `%s'",
lang_printable_name (op_type, 0), operator_string (node));
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
else
{
/* Before the addition, binary numeric promotion is performed on
both operands */
value = build_int_2 (1, 0);
TREE_TYPE (node) =
binary_numeric_promotion (op_type, TREE_TYPE (value), &op, &value);
/* And write the promoted incremented and increment */
TREE_OPERAND (node, 0) = op;
TREE_OPERAND (node, 1) = value;
/* Convert the overall back into its original type. */
return fold (convert (op_type, node));
}
break;
/* 15.14.3 Unary Plus Operator + */
case UNARY_PLUS_EXPR:
/* 15.14.4 Unary Minus Operator - */
case NEGATE_EXPR:
if (!JNUMERIC_TYPE_P (op_type))
{
ERROR_CANT_CONVERT_TO_NUMERIC (wfl_operator, node, op_type);
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
/* Unary numeric promotion is performed on operand */
else
{
op = do_unary_numeric_promotion (op);
prom_type = TREE_TYPE (op);
if (code == UNARY_PLUS_EXPR)
return fold (op);
}
break;
/* 15.14.5 Bitwise Complement Operator ~ */
case BIT_NOT_EXPR:
if (!JINTEGRAL_TYPE_P (op_type))
{
ERROR_CAST_NEEDED_TO_INTEGRAL (wfl_operator, node, op_type);
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
else
{
op = do_unary_numeric_promotion (op);
prom_type = TREE_TYPE (op);
}
break;
/* 15.14.6 Logical Complement Operator ! */
case TRUTH_NOT_EXPR:
if (TREE_CODE (op_type) != BOOLEAN_TYPE)
{
ERROR_CANT_CONVERT_TO_BOOLEAN (wfl_operator, node, op_type);
/* But the type is known. We will report an error if further
attempt of a assignment is made with this rhs */
TREE_TYPE (node) = boolean_type_node;
error_found = 1;
}
else
prom_type = boolean_type_node;
break;
/* 15.15 Cast Expression */
case CONVERT_EXPR:
value = patch_cast (node, wfl_operator);
if (value == error_mark_node)
{
/* If this cast is part of an assignment, we tell the code
that deals with it not to complain about a mismatch,
because things have been cast, anyways */
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
else
{
value = fold (value);
TREE_SIDE_EFFECTS (value) = TREE_SIDE_EFFECTS (op);
return value;
}
break;
}
if (error_found)
return error_mark_node;
/* There are cases where node has been replaced by something else
and we don't end up returning here: UNARY_PLUS_EXPR,
CONVERT_EXPR, {POST,PRE}{INCR,DECR}EMENT_EXPR. */
TREE_OPERAND (node, 0) = fold (op);
TREE_TYPE (node) = prom_type;
TREE_SIDE_EFFECTS (node) = TREE_SIDE_EFFECTS (op);
return fold (node);
}
/* Generic type resolution that sometimes takes place during node
patching. Returned the resolved type or generate an error
message. Return the resolved type or NULL_TREE. */
static tree
resolve_type_during_patch (type)
tree type;
{
if (unresolved_type_p (type, NULL))
{
tree type_decl = resolve_no_layout (EXPR_WFL_NODE (type), NULL_TREE);
if (!type_decl)
{
parse_error_context (type,
"Class `%s' not found in type declaration",
IDENTIFIER_POINTER (EXPR_WFL_NODE (type)));
return NULL_TREE;
}
else
{
CLASS_LOADED_P (TREE_TYPE (type_decl)) = 1;
return TREE_TYPE (type_decl);
}
}
return type;
}
/* 5.5 Casting Conversion. error_mark_node is returned if an error is
found. Otherwise NODE or something meant to replace it is returned. */
static tree
patch_cast (node, wfl_operator)
tree node;
tree wfl_operator;
{
tree op = TREE_OPERAND (node, 0);
tree op_type = TREE_TYPE (op);
tree cast_type = TREE_TYPE (node);
char *t1;
/* First resolve OP_TYPE if unresolved */
if (!(cast_type = resolve_type_during_patch (cast_type)))
return error_mark_node;
/* Check on cast that are proven correct at compile time */
if (JNUMERIC_TYPE_P (cast_type) && JNUMERIC_TYPE_P (op_type))
{
static tree convert_narrow ();
/* Same type */
if (cast_type == op_type)
return node;
/* float and double type are converted to the original type main
variant and then to the target type. */
if (JFLOAT_TYPE_P (op_type) && TREE_CODE (cast_type) == CHAR_TYPE)
op = convert (integer_type_node, op);
/* Try widening/narowwing convertion. Potentially, things need
to be worked out in gcc so we implement the extreme cases
correctly. fold_convert() needs to be fixed. */
return convert (cast_type, op);
}
/* It's also valid to cast a boolean into a boolean */
if (op_type == boolean_type_node && cast_type == boolean_type_node)
return node;
/* null can be casted to references */
if (op == null_pointer_node && JREFERENCE_TYPE_P (cast_type))
return build_null_of_type (cast_type);
/* The remaining legal casts involve conversion between reference
types. Check for their compile time correctness. */
if (JREFERENCE_TYPE_P (op_type) && JREFERENCE_TYPE_P (cast_type)
&& valid_ref_assignconv_cast_p (op_type, cast_type, 1))
{
TREE_TYPE (node) = promote_type (cast_type);
/* Now, the case can be determined correct at compile time if
OP_TYPE can be converted into CAST_TYPE by assignment
conversion (5.2) */
if (valid_ref_assignconv_cast_p (op_type, cast_type, 0))
{
TREE_SET_CODE (node, NOP_EXPR);
return node;
}
if (flag_emit_class_files)
{
TREE_SET_CODE (node, CONVERT_EXPR);
return node;
}
/* The cast requires a run-time check */
return build (CALL_EXPR, promote_type (cast_type),
build_address_of (soft_checkcast_node),
tree_cons (NULL_TREE, build_class_ref (cast_type),
build_tree_list (NULL_TREE, op)),
NULL_TREE);
}
/* Any other casts are proven incorrect at compile time */
t1 = strdup (lang_printable_name (op_type, 0));
parse_error_context (wfl_operator, "Invalid cast from `%s' to `%s'",
t1, lang_printable_name (cast_type, 0));
free (t1);
return error_mark_node;
}
/* Build a null constant and give it the type TYPE. */
static tree
build_null_of_type (type)
tree type;
{
tree node = build_int_2 (0, 0);
TREE_TYPE (node) = promote_type (type);
return node;
}
/* Build an ARRAY_REF incomplete tree node. Note that operand 1 isn't
a list of indices. */
static tree
build_array_ref (location, array, index)
int location;
tree array, index;
{
tree node = build (ARRAY_REF, NULL_TREE, array, index);
EXPR_WFL_LINECOL (node) = location;
return node;
}
/* 15.12 Array Access Expression */
static tree
patch_array_ref (node)
tree node;
{
tree array = TREE_OPERAND (node, 0);
tree array_type = TREE_TYPE (array);
tree index = TREE_OPERAND (node, 1);
tree index_type = TREE_TYPE (index);
int error_found = 0;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
if (TREE_CODE (array_type) == POINTER_TYPE)
array_type = TREE_TYPE (array_type);
/* The array reference must be an array */
if (!TYPE_ARRAY_P (array_type))
{
parse_error_context
(wfl_operator, "`[]' can only be applied to arrays. It can't be "
"applied to `%s'", lang_printable_name (array_type, 0));
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
/* The array index underdoes unary numeric promotion. The promoted
type must be int */
index = do_unary_numeric_promotion (index);
if (TREE_TYPE (index) != int_type_node)
{
int could_cast = valid_cast_to_p (index_type, int_type_node);
parse_error_context
(wfl_operator,
(could_cast ? "Incompatible type for `[]'. Explicit cast needed to "
"convert `%s' to `int'" : "Incompatible type for `[]'. "
"Can't convert `%s' to `int'"),
lang_printable_name (index_type, 0));
TREE_TYPE (node) = error_mark_node;
error_found = 1;
}
if (error_found)
return error_mark_node;
array_type = TYPE_ARRAY_ELEMENT (array_type);
if (flag_emit_class_files || flag_emit_xref)
{
TREE_OPERAND (node, 0) = array;
TREE_OPERAND (node, 1) = index;
}
else
{
/* The save_expr is for correct evaluation order. It would be cleaner
to use force_evaluation_order (see comment there), but that is
difficult when we also have to deal with bounds checking. */
if (TREE_SIDE_EFFECTS (index))
array = save_expr (array);
node = build_java_arrayaccess (array, array_type, index);
if (TREE_SIDE_EFFECTS (index))
node = build (COMPOUND_EXPR, array_type, array, node);
}
TREE_TYPE (node) = array_type;
return node;
}
/* 15.9 Array Creation Expressions */
static tree
build_newarray_node (type, dims, extra_dims)
tree type;
tree dims;
int extra_dims;
{
tree node =
build (NEW_ARRAY_EXPR, NULL_TREE, type, nreverse (dims),
build_int_2 (extra_dims, 0));
return node;
}
static tree
patch_newarray (node)
tree node;
{
tree type = TREE_OPERAND (node, 0);
tree dims = TREE_OPERAND (node, 1);
tree cdim, array_type;
int error_found = 0;
int ndims = 0;
int xdims = TREE_INT_CST_LOW (TREE_OPERAND (node, 2));
/* Dimension types are verified. It's better for the types to be
verified in order. */
for (cdim = dims, ndims = 0; cdim; cdim = TREE_CHAIN (cdim), ndims++ )
{
int dim_error = 0;
tree dim = TREE_VALUE (cdim);
/* Dim might have been saved during its evaluation */
dim = (TREE_CODE (dim) == SAVE_EXPR ? dim = TREE_OPERAND (dim, 0) : dim);
/* The type of each specified dimension must be an integral type. */
if (!JINTEGRAL_TYPE_P (TREE_TYPE (dim)))
dim_error = 1;
/* Each expression undergoes an unary numeric promotion (5.6.1) and the
promoted type must be int. */
else
{
dim = do_unary_numeric_promotion (dim);
if (TREE_TYPE (dim) != int_type_node)
dim_error = 1;
}
/* Report errors on types here */
if (dim_error)
{
parse_error_context
(TREE_PURPOSE (cdim),
"Incompatible type for dimension in array creation expression. "
"%s convert `%s' to `int'",
(valid_cast_to_p (TREE_TYPE (dim), int_type_node) ?
"Explicit cast needed to" : "Can't"),
lang_printable_name (TREE_TYPE (dim), 0));
error_found = 1;
}
TREE_PURPOSE (cdim) = NULL_TREE;
}
/* Resolve array base type if unresolved */
if (!(type = resolve_type_during_patch (type)))
error_found = 1;
if (error_found)
{
/* We don't want further evaluation of this bogus array creation
operation */
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
/* Set array_type to the actual (promoted) array type of the result. */
if (TREE_CODE (type) == RECORD_TYPE)
type = build_pointer_type (type);
while (--xdims >= 0)
{
type = promote_type (build_java_array_type (type, -1));
}
dims = nreverse (dims);
array_type = type;
for (cdim = dims; cdim; cdim = TREE_CHAIN (cdim))
{
type = array_type;
array_type = build_java_array_type (type,
TREE_CODE (cdim) == INTEGER_CST ?
TREE_INT_CST_LOW (cdim) : -1);
array_type = promote_type (array_type);
}
dims = nreverse (dims);
/* The node is transformed into a function call. Things are done
differently according to the number of dimensions. If the number
of dimension is equal to 1, then the nature of the base type
(primitive or not) matters. */
if (ndims == 1)
return build_new_array (type, TREE_VALUE (dims));
/* Can't reuse what's already written in expr.c because it uses the
JVM stack representation. Provide a build_multianewarray. FIXME */
return build (CALL_EXPR, array_type,
build_address_of (soft_multianewarray_node),
tree_cons (NULL_TREE, build_class_ref (TREE_TYPE (array_type)),
tree_cons (NULL_TREE,
build_int_2 (ndims, 0), dims )),
NULL_TREE);
}
/* 10.6 Array initializer. */
/* Build a wfl for array element that don't have one, so we can
pin-point errors. */
static tree
maybe_build_array_element_wfl (node)
tree node;
{
if (TREE_CODE (node) != EXPR_WITH_FILE_LOCATION)
return build_expr_wfl (NULL_TREE, ctxp->filename,
ctxp->elc.line, ctxp->elc.prev_col);
else
return NULL_TREE;
}
/* Build a NEW_ARRAY_INIT that features a CONSTRUCTOR node. This makes
identification of initialized arrays easier to detect during walk
and expansion. */
static tree
build_new_array_init (location, values)
int location;
tree values;
{
tree constructor = build (CONSTRUCTOR, NULL_TREE, NULL_TREE, values);
tree to_return = build1 (NEW_ARRAY_INIT, NULL_TREE, constructor);
EXPR_WFL_LINECOL (to_return) = location;
return to_return;
}
/* Expand a NEW_ARRAY_INIT node. Return error_mark_node if an error
occurred. Otherwise return NODE after having set its type
appropriately. */
static tree
patch_new_array_init (type, node)
tree type, node;
{
int error_seen = 0;
tree current, element_type;
HOST_WIDE_INT length;
int all_constant = 1;
tree init = TREE_OPERAND (node, 0);
if (TREE_CODE (type) != POINTER_TYPE || ! TYPE_ARRAY_P (TREE_TYPE (type)))
{
parse_error_context (node,
"Invalid array initializer for non-array type `%s'",
lang_printable_name (type, 1));
return error_mark_node;
}
type = TREE_TYPE (type);
element_type = TYPE_ARRAY_ELEMENT (type);
CONSTRUCTOR_ELTS (init) = nreverse (CONSTRUCTOR_ELTS (init));
for (length = 0, current = CONSTRUCTOR_ELTS (init);
current; length++, current = TREE_CHAIN (current))
{
tree elt = TREE_VALUE (current);
if (elt == NULL_TREE || TREE_CODE (elt) != NEW_ARRAY_INIT)
{
error_seen |= array_constructor_check_entry (element_type, current);
elt = TREE_VALUE (current);
/* When compiling to native code, STRING_CST is converted to
INDIRECT_REF, but still with a TREE_CONSTANT flag. */
if (! TREE_CONSTANT (elt) || TREE_CODE (elt) == INDIRECT_REF)
all_constant = 0;
}
else
{
TREE_VALUE (current) = patch_new_array_init (element_type, elt);
TREE_PURPOSE (current) = NULL_TREE;
all_constant = 0;
}
if (elt && TREE_VALUE (elt) == error_mark_node)
error_seen = 1;
}
if (error_seen)
return error_mark_node;
/* Create a new type. We can't reuse the one we have here by
patching its dimension because it originally is of dimension -1
hence reused by gcc. This would prevent triangular arrays. */
type = build_java_array_type (element_type, length);
TREE_TYPE (init) = TREE_TYPE (TREE_CHAIN (TREE_CHAIN (TYPE_FIELDS (type))));
TREE_TYPE (node) = promote_type (type);
TREE_CONSTANT (init) = all_constant;
TREE_CONSTANT (node) = all_constant;
return node;
}
/* Verify that one entry of the initializer element list can be
assigned to the array base type. Report 1 if an error occurred, 0
otherwise. */
static int
array_constructor_check_entry (type, entry)
tree type, entry;
{
char *array_type_string = NULL; /* For error reports */
tree value, type_value, new_value, wfl_value, patched;
int error_seen = 0;
new_value = NULL_TREE;
wfl_value = TREE_VALUE (entry);
value = java_complete_tree (TREE_VALUE (entry));
/* patch_string return error_mark_node if arg is error_mark_node */
if ((patched = patch_string (value)))
value = patched;
if (value == error_mark_node)
return 1;
type_value = TREE_TYPE (value);
/* At anytime, try_builtin_assignconv can report a warning on
constant overflow during narrowing. */
SET_WFL_OPERATOR (wfl_operator, TREE_PURPOSE (entry), wfl_value);
new_value = try_builtin_assignconv (wfl_operator, type, value);
if (!new_value && (new_value = try_reference_assignconv (type, value)))
type_value = promote_type (type);
/* Check and report errors */
if (!new_value)
{
char *msg = (!valid_cast_to_p (type_value, type) ?
"Can't" : "Explicit cast needed to");
if (!array_type_string)
array_type_string = strdup (lang_printable_name (type, 1));
parse_error_context
(wfl_operator, "Incompatible type for array. %s convert `%s' to `%s'",
msg, lang_printable_name (type_value, 1), array_type_string);
error_seen = 1;
}
if (new_value)
{
new_value = maybe_build_primttype_type_ref (new_value, wfl_operator);
TREE_VALUE (entry) = new_value;
}
if (array_type_string)
free (array_type_string);
TREE_PURPOSE (entry) = NULL_TREE;
return error_seen;
}
static tree
build_this (location)
int location;
{
tree node = build_wfl_node (this_identifier_node);
TREE_SET_CODE (node, THIS_EXPR);
EXPR_WFL_LINECOL (node) = location;
return node;
}
/* 14.15 The return statement. It builds a modify expression that
assigns the returned value to the RESULT_DECL that hold the value
to be returned. */
static tree
build_return (location, op)
int location;
tree op;
{
tree node = build1 (RETURN_EXPR, NULL_TREE, op);
EXPR_WFL_LINECOL (node) = location;
node = build_debugable_stmt (location, node);
return node;
}
static tree
patch_return (node)
tree node;
{
tree return_exp = TREE_OPERAND (node, 0);
tree meth = current_function_decl;
tree mtype = TREE_TYPE (TREE_TYPE (current_function_decl));
int error_found = 0;
TREE_TYPE (node) = error_mark_node;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
/* It's invalid to have a return value within a function that is
declared with the keyword void or that is a constructor */
if (return_exp && (mtype == void_type_node || DECL_CONSTRUCTOR_P (meth)))
error_found = 1;
/* It's invalid to use a return statement in a static block */
if (IS_CLINIT (current_function_decl))
error_found = 1;
/* It's invalid to have a no return value within a function that
isn't declared with the keyword `void' */
if (!return_exp && (mtype != void_type_node && !DECL_CONSTRUCTOR_P (meth)))
error_found = 2;
if (error_found)
{
if (IS_CLINIT (current_function_decl))
parse_error_context (wfl_operator,
"`return' inside static initializer.");
else if (!DECL_CONSTRUCTOR_P (meth))
{
char *t = strdup (lang_printable_name (mtype, 0));
parse_error_context (wfl_operator,
"`return' with%s value from `%s %s'",
(error_found == 1 ? "" : "out"),
t, lang_printable_name (meth, 0));
free (t);
}
else
parse_error_context (wfl_operator,
"`return' with value from constructor `%s'",
lang_printable_name (meth, 0));
return error_mark_node;
}
/* If we have a return_exp, build a modify expression and expand
it. Note: at that point, the assignment is declared valid, but we
may want to carry some more hacks */
if (return_exp)
{
tree exp = java_complete_tree (return_exp);
tree modify, patched;
/* If the function returned value and EXP are booleans, EXP has
to be converted into the type of DECL_RESULT, which is integer
(see complete_start_java_method) */
if (TREE_TYPE (exp) == boolean_type_node &&
TREE_TYPE (TREE_TYPE (meth)) == boolean_type_node)
exp = convert_to_integer (TREE_TYPE (DECL_RESULT (meth)), exp);
/* `null' can be assigned to a function returning a reference */
if (JREFERENCE_TYPE_P (TREE_TYPE (TREE_TYPE (meth))) &&
exp == null_pointer_node)
exp = build_null_of_type (TREE_TYPE (TREE_TYPE (meth)));
if ((patched = patch_string (exp)))
exp = patched;
modify = build (MODIFY_EXPR, NULL_TREE, DECL_RESULT (meth), exp);
EXPR_WFL_LINECOL (modify) = EXPR_WFL_LINECOL (node);
modify = java_complete_tree (modify);
if (modify != error_mark_node)
{
TREE_SIDE_EFFECTS (modify) = 1;
TREE_OPERAND (node, 0) = modify;
}
else
return error_mark_node;
}
TREE_TYPE (node) = void_type_node;
TREE_SIDE_EFFECTS (node) = 1;
return node;
}
/* 14.8 The if Statement */
static tree
build_if_else_statement (location, expression, if_body, else_body)
int location;
tree expression, if_body, else_body;
{
tree node;
if (!else_body)
else_body = empty_stmt_node;
node = build (COND_EXPR, NULL_TREE, expression, if_body, else_body);
EXPR_WFL_LINECOL (node) = location;
node = build_debugable_stmt (location, node);
return node;
}
static tree
patch_if_else_statement (node)
tree node;
{
tree expression = TREE_OPERAND (node, 0);
TREE_TYPE (node) = error_mark_node;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
/* The type of expression must be boolean */
if (TREE_TYPE (expression) != boolean_type_node
&& TREE_TYPE (expression) != promoted_boolean_type_node)
{
parse_error_context
(wfl_operator,
"Incompatible type for `if'. Can't convert `%s' to `boolean'",
lang_printable_name (TREE_TYPE (expression), 0));
return error_mark_node;
}
TREE_TYPE (node) = void_type_node;
TREE_SIDE_EFFECTS (node) = 1;
CAN_COMPLETE_NORMALLY (node)
= CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1))
| CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 2));
return node;
}
/* 14.6 Labeled Statements */
/* Action taken when a lableled statement is parsed. a new
LABELED_BLOCK_EXPR is created. No statement is attached to the
label, yet. LABEL can be NULL_TREE for artificially-generated blocks. */
static tree
build_labeled_block (location, label)
int location;
tree label;
{
tree label_name ;
tree label_decl, node;
if (label == NULL_TREE || label == continue_identifier_node)
label_name = label;
else
{
label_name = merge_qualified_name (label_id, label);
/* Issue an error if we try to reuse a label that was previously
declared */
if (IDENTIFIER_LOCAL_VALUE (label_name))
{
EXPR_WFL_LINECOL (wfl_operator) = location;
parse_error_context (wfl_operator, "Declaration of `%s' shadows "
"a previous label declaration",
IDENTIFIER_POINTER (label));
EXPR_WFL_LINECOL (wfl_operator) =
EXPR_WFL_LINECOL (IDENTIFIER_LOCAL_VALUE (label_name));
parse_error_context (wfl_operator, "This is the location of the "
"previous declaration of label `%s'",
IDENTIFIER_POINTER (label));
java_error_count--;
}
}
label_decl = create_label_decl (label_name);
node = build (LABELED_BLOCK_EXPR, NULL_TREE, label_decl, NULL_TREE);
EXPR_WFL_LINECOL (node) = location;
TREE_SIDE_EFFECTS (node) = 1;
return node;
}
/* A labeled statement LBE is attached a statement. */
static tree
finish_labeled_statement (lbe, statement)
tree lbe; /* Labeled block expr */
tree statement;
{
/* In anyways, tie the loop to its statement */
LABELED_BLOCK_BODY (lbe) = statement;
pop_labeled_block ();
POP_LABELED_BLOCK ();
return lbe;
}
/* 14.10, 14.11, 14.12 Loop Statements */
/* Create an empty LOOP_EXPR and make it the last in the nested loop
list. */
static tree
build_new_loop (loop_body)
tree loop_body;
{
tree loop = build (LOOP_EXPR, NULL_TREE, loop_body);
TREE_SIDE_EFFECTS (loop) = 1;
PUSH_LOOP (loop);
return loop;
}
/* Create a loop body according to the following structure:
COMPOUND_EXPR
COMPOUND_EXPR (loop main body)
EXIT_EXPR (this order is for while/for loops.
LABELED_BLOCK_EXPR the order is reversed for do loops)
LABEL_DECL (a continue occuring here branches at the
BODY end of this labeled block)
INCREMENT (if any)
REVERSED, if non zero, tells that the loop condition expr comes
after the body, like in the do-while loop.
To obtain a loop, the loop body structure described above is
encapsulated within a LOOP_EXPR surrounded by a LABELED_BLOCK_EXPR:
LABELED_BLOCK_EXPR
LABEL_DECL (use this label to exit the loop)
LOOP_EXPR
<structure described above> */
static tree
build_loop_body (location, condition, reversed)
int location;
tree condition;
int reversed;
{
tree first, second, body;
condition = build (EXIT_EXPR, NULL_TREE, condition); /* Force walk */
EXPR_WFL_LINECOL (condition) = location; /* For accurate error report */
condition = build_debugable_stmt (location, condition);
TREE_SIDE_EFFECTS (condition) = 1;
body = build_labeled_block (0, continue_identifier_node);
first = (reversed ? body : condition);
second = (reversed ? condition : body);
return
build (COMPOUND_EXPR, NULL_TREE,
build (COMPOUND_EXPR, NULL_TREE, first, second), empty_stmt_node);
}
/* Install CONDITION (if any) and loop BODY (using REVERSED to tell
their order) on the current loop. Unlink the current loop from the
loop list. */
static tree
finish_loop_body (location, condition, body, reversed)
int location;
tree condition, body;
int reversed;
{
tree to_return = ctxp->current_loop;
tree loop_body = LOOP_EXPR_BODY (to_return);
if (condition)
{
tree cnode = LOOP_EXPR_BODY_CONDITION_EXPR (loop_body, reversed);
/* We wrapped the EXIT_EXPR around a WFL so we can debug it.
The real EXIT_EXPR is one operand further. */
EXPR_WFL_LINECOL (cnode) = location;
/* This one is for accurate error reports */
EXPR_WFL_LINECOL (TREE_OPERAND (cnode, 0)) = location;
TREE_OPERAND (TREE_OPERAND (cnode, 0), 0) = condition;
}
LOOP_EXPR_BODY_BODY_EXPR (loop_body, reversed) = body;
POP_LOOP ();
return to_return;
}
/* Tailored version of finish_loop_body for FOR loops, when FOR
loops feature the condition part */
static tree
finish_for_loop (location, condition, update, body)
int location;
tree condition, update, body;
{
/* Put the condition and the loop body in place */
tree loop = finish_loop_body (location, condition, body, 0);
/* LOOP is the current loop which has been now popped of the loop
stack. Install the update block */
LOOP_EXPR_BODY_UPDATE_BLOCK (LOOP_EXPR_BODY (loop)) = update;
return loop;
}
/* If the loop isn't surrounded by a labeled statement, create one and
insert LOOP as its body. */
static tree
patch_loop_statement (loop)
tree loop;
{
tree loop_label;
tree block = ctxp->current_labeled_block;
TREE_TYPE (loop) = void_type_node;
if (block != NULL_TREE)
{
tree block_body = LABELED_BLOCK_BODY (block);
if (IS_FOR_LOOP_P (loop))
{
if (TREE_CODE (block_body) == BLOCK)
{
block_body = BLOCK_EXPR_BODY (block_body);
if (block_body == loop
|| (TREE_CODE (block_body) == COMPOUND_EXPR
&& TREE_OPERAND (block_body, 1) == loop))
return loop;
}
}
else
{
if (block_body == loop)
return loop;
}
}
loop_label = build_labeled_block (0, NULL_TREE);
LABELED_BLOCK_BODY (loop_label) = loop;
PUSH_LABELED_BLOCK (loop_label);
loop = loop_label;
return loop;
}
/* 14.13, 14.14: break and continue Statements */
/* Build a break or a continue statement. a null NAME indicates an
unlabeled break/continue statement. */
static tree
build_bc_statement (location, is_break, name)
int location, is_break;
tree name;
{
tree break_continue, label_block_expr = NULL_TREE;
if (name)
{
if (!(label_block_expr = IDENTIFIER_LOCAL_VALUE
(merge_qualified_name (label_id, EXPR_WFL_NODE (name)))))
/* Null means that we don't have a target for this named
break/continue. In this case, we make the target to be the
label name, so that the error can be reported accuratly in
patch_bc_statement. */
label_block_expr = EXPR_WFL_NODE (name);
}
/* Unlabeled break/continue will be handled during the
break/continue patch operation */
break_continue
= build (EXIT_BLOCK_EXPR, NULL_TREE, label_block_expr, NULL_TREE);
IS_BREAK_STMT_P (break_continue) = is_break;
TREE_SIDE_EFFECTS (break_continue) = 1;
EXPR_WFL_LINECOL (break_continue) = location;
break_continue = build_debugable_stmt (location, break_continue);
return break_continue;
}
/* Verification of a break/continue statement. */
static tree
patch_bc_statement (node)
tree node;
{
tree bc_label = EXIT_BLOCK_LABELED_BLOCK (node), target_stmt;
tree labeled_block = ctxp->current_labeled_block;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
/* Having an identifier here means that the target is unknown. */
if (bc_label != NULL_TREE && TREE_CODE (bc_label) == IDENTIFIER_NODE)
{
parse_error_context (wfl_operator, "No label definition found for `%s'",
IDENTIFIER_POINTER (bc_label));
return error_mark_node;
}
if (! IS_BREAK_STMT_P (node))
{
/* It's a continue statement. */
for (;; labeled_block = TREE_CHAIN (labeled_block))
{
if (labeled_block == NULL_TREE)
{
if (bc_label == NULL_TREE)
parse_error_context (wfl_operator,
"`continue' must be in loop");
else
parse_error_context
(wfl_operator, "continue label `%s' does not name a loop",
IDENTIFIER_POINTER (bc_label));
return error_mark_node;
}
if ((DECL_NAME (LABELED_BLOCK_LABEL (labeled_block))
== continue_identifier_node)
&& (bc_label == NULL_TREE
|| TREE_CHAIN (labeled_block) == bc_label))
{
bc_label = labeled_block;
break;
}
}
}
else if (!bc_label)
{
for (;; labeled_block = TREE_CHAIN (labeled_block))
{
if (labeled_block == NULL_TREE)
{
parse_error_context (wfl_operator,
"`break' must be in loop or switch");
return error_mark_node;
}
target_stmt = LABELED_BLOCK_BODY (labeled_block);
if (TREE_CODE (target_stmt) == SWITCH_EXPR
|| TREE_CODE (target_stmt) == LOOP_EXPR)
{
bc_label = labeled_block;
break;
}
}
}
EXIT_BLOCK_LABELED_BLOCK (node) = bc_label;
CAN_COMPLETE_NORMALLY (bc_label) = 1;
/* Our break/continue don't return values. */
TREE_TYPE (node) = void_type_node;
/* Encapsulate the break within a compound statement so that it's
expanded all the times by expand_expr (and not clobered
sometimes, like after a if statement) */
node = add_stmt_to_compound (NULL_TREE, void_type_node, node);
TREE_SIDE_EFFECTS (node) = 1;
return node;
}
/* Process the exit expression belonging to a loop. Its type must be
boolean. */
static tree
patch_exit_expr (node)
tree node;
{
tree expression = TREE_OPERAND (node, 0);
TREE_TYPE (node) = error_mark_node;
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
/* The type of expression must be boolean */
if (TREE_TYPE (expression) != boolean_type_node)
{
parse_error_context
(wfl_operator,
"Incompatible type for loop conditional. Can't convert `%s' to "
"`boolean'",
lang_printable_name (TREE_TYPE (expression), 0));
return error_mark_node;
}
/* Now we know things are allright, invert the condition, fold and
return */
TREE_OPERAND (node, 0) =
fold (build1 (TRUTH_NOT_EXPR, boolean_type_node, expression));
if (! integer_zerop (TREE_OPERAND (node, 0))
&& ctxp->current_loop != NULL_TREE
&& TREE_CODE (ctxp->current_loop) == LOOP_EXPR)
CAN_COMPLETE_NORMALLY (ctxp->current_loop) = 1;
if (! integer_onep (TREE_OPERAND (node, 0)))
CAN_COMPLETE_NORMALLY (node) = 1;
TREE_TYPE (node) = void_type_node;
return node;
}
/* 14.9 Switch statement */
static tree
patch_switch_statement (node)
tree node;
{
tree se = TREE_OPERAND (node, 0), se_type;
/* Complete the switch expression */
se = TREE_OPERAND (node, 0) = java_complete_tree (se);
se_type = TREE_TYPE (se);
/* The type of the switch expression must be char, byte, short or
int */
if (!JINTEGRAL_TYPE_P (se_type))
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node);
parse_error_context (wfl_operator, "Incompatible type for `switch'. "
"Can't convert `%s' to `int'",
lang_printable_name (se_type, 0));
/* This is what java_complete_tree will check */
TREE_OPERAND (node, 0) = error_mark_node;
return error_mark_node;
}
TREE_OPERAND (node, 1) = java_complete_tree (TREE_OPERAND (node, 1));
/* Ready to return */
if (TREE_CODE (TREE_OPERAND (node, 1)) == ERROR_MARK)
{
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
TREE_TYPE (node) = void_type_node;
TREE_SIDE_EFFECTS (node) = 1;
CAN_COMPLETE_NORMALLY (node)
= CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1))
|| ! SWITCH_HAS_DEFAULT (node);
return node;
}
/* 14.18 The try statement */
static tree
build_try_statement (location, try_block, catches)
int location;
tree try_block, catches;
{
tree node = build (TRY_EXPR, NULL_TREE, try_block, catches);
EXPR_WFL_LINECOL (node) = location;
return node;
}
static tree
build_try_finally_statement (location, try_block, finally)
int location;
tree try_block, finally;
{
tree node = build (TRY_FINALLY_EXPR, NULL_TREE, try_block, finally);
EXPR_WFL_LINECOL (node) = location;
return node;
}
static tree
patch_try_statement (node)
tree node;
{
int error_found = 0;
tree try = TREE_OPERAND (node, 0);
/* Exception handlers are considered in left to right order */
tree catch = nreverse (TREE_OPERAND (node, 1));
tree current, caught_type_list = NULL_TREE;
/* Check catch clauses, if any. Every time we find an error, we try
to process the next catch clause. We process the catch clause before
the try block so that when processing the try block we can check thrown
exceptions againts the caught type list. */
for (current = catch; current; current = TREE_CHAIN (current))
{
tree carg_decl, carg_type;
tree sub_current, catch_block, catch_clause;
int unreachable;
/* At this point, the structure of the catch clause is
CATCH_EXPR (catch node)
BLOCK (with the decl of the parameter)
COMPOUND_EXPR
MODIFY_EXPR (assignment of the catch parameter)
BLOCK (catch clause block)
*/
catch_clause = TREE_OPERAND (current, 0);
carg_decl = BLOCK_EXPR_DECLS (catch_clause);
carg_type = TREE_TYPE (TREE_TYPE (carg_decl));
/* Catch clauses can't have more than one parameter declared,
but it's already enforced by the grammar. Make sure that the
only parameter of the clause statement in of class Throwable
or a subclass of Throwable, but that was done earlier. The
catch clause parameter type has also been resolved. */
/* Just make sure that the catch clause parameter type inherits
from java.lang.Throwable */
if (!inherits_from_p (carg_type, throwable_type_node))
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (current);
parse_error_context (wfl_operator,
"Can't catch class `%s'. Catch clause "
"parameter type must be a subclass of "
"class `java.lang.Throwable'",
lang_printable_name (carg_type, 0));
error_found = 1;
continue;
}
/* Partial check for unreachable catch statement: The catch
clause is reachable iff is no earlier catch block A in
the try statement such that the type of the catch
clause's parameter is the same as or a subclass of the
type of A's parameter */
unreachable = 0;
for (sub_current = catch;
sub_current != current; sub_current = TREE_CHAIN (sub_current))
{
tree sub_catch_clause, decl;
sub_catch_clause = TREE_OPERAND (sub_current, 0);
decl = BLOCK_EXPR_DECLS (sub_catch_clause);
if (inherits_from_p (carg_type, TREE_TYPE (TREE_TYPE (decl))))
{
EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (current);
parse_error_context
(wfl_operator, "`catch' not reached because of the catch "
"clause at line %d", EXPR_WFL_LINENO (sub_current));
unreachable = error_found = 1;
break;
}
}
/* Complete the catch clause block */
catch_block = java_complete_tree (TREE_OPERAND (current, 0));
if (catch_block == error_mark_node)
{
error_found = 1;
continue;
}
if (CAN_COMPLETE_NORMALLY (catch_block))
CAN_COMPLETE_NORMALLY (node) = 1;
TREE_OPERAND (current, 0) = catch_block;
if (unreachable)
continue;
/* Things to do here: the exception must be thrown */
/* Link this type to the caught type list */
caught_type_list = tree_cons (NULL_TREE, carg_type, caught_type_list);
}
PUSH_EXCEPTIONS (caught_type_list);
if ((try = java_complete_tree (try)) == error_mark_node)
error_found = 1;
if (CAN_COMPLETE_NORMALLY (try))
CAN_COMPLETE_NORMALLY (node) = 1;
POP_EXCEPTIONS ();
/* Verification ends here */
if (error_found)
return error_mark_node;
TREE_OPERAND (node, 0) = try;
TREE_OPERAND (node, 1) = catch;
TREE_TYPE (node) = void_type_node;
return node;
}
/* 14.17 The synchronized Statement */
static tree
patch_synchronized_statement (node, wfl_op1)
tree node, wfl_op1;
{
tree expr = java_complete_tree (TREE_OPERAND (node, 0));
tree block = TREE_OPERAND (node, 1);
tree enter, exit, expr_decl, assignment;
if (expr == error_mark_node)
{
block = java_complete_tree (block);
return expr;
}
/* The TYPE of expr must be a reference type */
if (!JREFERENCE_TYPE_P (TREE_TYPE (expr)))
{
SET_WFL_OPERATOR (wfl_operator, node, wfl_op1);
parse_error_context (wfl_operator, "Incompatible type for `synchronized'"
". Can't convert `%s' to `java.lang.Object'",
lang_printable_name (TREE_TYPE (expr), 0));
return error_mark_node;
}
if (flag_emit_xref)
{
TREE_OPERAND (node, 0) = expr;
TREE_OPERAND (node, 1) = java_complete_tree (block);
CAN_COMPLETE_NORMALLY (node) = 1;
return node;
}
/* Generate a try-finally for the synchronized statement, except
that the handler that catches all throw exception calls
_Jv_MonitorExit and then rethrow the exception.
The synchronized statement is then implemented as:
TRY
{
_Jv_MonitorEnter (expression)
synchronized_block
_Jv_MonitorExit (expression)
}
CATCH_ALL
{
e = _Jv_exception_info ();
_Jv_MonitorExit (expression)
Throw (e);
} */
expr_decl = build_decl (VAR_DECL, generate_name (), TREE_TYPE (expr));
BUILD_MONITOR_ENTER (enter, expr_decl);
BUILD_MONITOR_EXIT (exit, expr_decl);
CAN_COMPLETE_NORMALLY (enter) = 1;
CAN_COMPLETE_NORMALLY (exit) = 1;
assignment = build (MODIFY_EXPR, NULL_TREE, expr_decl, expr);
TREE_SIDE_EFFECTS (assignment) = 1;
node = build1 (CLEANUP_POINT_EXPR, NULL_TREE,
build (COMPOUND_EXPR, NULL_TREE,
build (WITH_CLEANUP_EXPR, NULL_TREE,
build (COMPOUND_EXPR, NULL_TREE,
assignment, enter),
NULL_TREE, exit),
block));
node = build_expr_block (node, expr_decl);
return java_complete_tree (node);
}
/* 14.16 The throw Statement */
static tree
patch_throw_statement (node, wfl_op1)
tree node, wfl_op1;
{
tree expr = TREE_OPERAND (node, 0);
tree type = TREE_TYPE (expr);
int unchecked_ok = 0, tryblock_throws_ok = 0;
/* Thrown expression must be assignable to java.lang.Throwable */
if (!try_reference_assignconv (throwable_type_node, expr))
{
SET_WFL_OPERATOR (wfl_operator, node, wfl_op1);
parse_error_context (wfl_operator, "Can't throw `%s'; it must be a "
"subclass of class `java.lang.Throwable'",
lang_printable_name (type, 0));
/* If the thrown expression was a reference, we further the
compile-time check. */
if (!JREFERENCE_TYPE_P (type))
return error_mark_node;
}
/* At least one of the following must be true */
/* The type of the throw expression is a not checked exception,
i.e. is a unchecked expression. */
unchecked_ok = IS_UNCHECKED_EXCEPTION_P (TREE_TYPE (type));
/* Throw is contained in a try statement and at least one catch
clause can receive the thrown expression or the current method is
declared to throw such an exception. Or, the throw statement is
contained in a method or constructor declaration and the type of
the Expression is assignable to at least one type listed in the
throws clause the declaration. */
SET_WFL_OPERATOR (wfl_operator, node, wfl_op1);
if (!unchecked_ok)
tryblock_throws_ok = check_thrown_exceptions_do (TREE_TYPE (expr));
if (!(unchecked_ok || tryblock_throws_ok))
{
/* If there is a surrounding try block that has no matching
clatch clause, report it first. A surrounding try block exits
only if there is something after the list of checked
exception thrown by the current function (if any). */
if (IN_TRY_BLOCK_P ())
parse_error_context (wfl_operator, "Checked exception `%s' can't be "
"caught by any of the catch clause(s) "
"of the surrounding `try' block",
lang_printable_name (type, 0));
/* If we have no surrounding try statement and the method doesn't have
any throws, report it now. FIXME */
/* We report that the exception can't be throw from a try block
in all circumstances but when the `throw' is inside a static
block. */
else if (!EXCEPTIONS_P (currently_caught_type_list)
&& !tryblock_throws_ok)
{
if (IS_CLINIT (current_function_decl))
parse_error_context (wfl_operator, "Checked exception `%s' can't "
"be thrown in initializer",
lang_printable_name (type, 0));
else
parse_error_context (wfl_operator, "Checked exception `%s' isn't "
"thrown from a `try' block",
lang_printable_name (type, 0));
}
/* Otherwise, the current method doesn't have the appropriate
throws declaration */
else
parse_error_context (wfl_operator, "Checked exception `%s' doesn't "
"match any of current method's `throws' "
"declaration(s)",
lang_printable_name (type, 0));
return error_mark_node;
}
if (! flag_emit_class_files && ! flag_emit_xref)
BUILD_THROW (node, expr);
/* If doing xrefs, keep the location where the `throw' was seen. */
if (flag_emit_xref)
EXPR_WFL_LINECOL (node) = EXPR_WFL_LINECOL (wfl_op1);
return node;
}
/* Check that exception said to be thrown by method DECL can be
effectively caught from where DECL is invoked. */
static void
check_thrown_exceptions (location, decl)
int location;
tree decl;
{
tree throws;
/* For all the unchecked exceptions thrown by DECL */
for (throws = DECL_FUNCTION_THROWS (decl); throws;
throws = TREE_CHAIN (throws))
if (!check_thrown_exceptions_do (TREE_VALUE (throws)))
{
#if 1
/* Temporary hack to suppresses errors about cloning arrays. FIXME */
if (DECL_NAME (decl) == get_identifier ("clone"))
continue;
#endif
EXPR_WFL_LINECOL (wfl_operator) = location;
parse_error_context
(wfl_operator, "Exception `%s' must be caught, or it must be "
"declared in the `throws' clause of `%s'",
lang_printable_name (TREE_VALUE (throws), 0),
IDENTIFIER_POINTER (DECL_NAME (current_function_decl)));
}
}
/* Return 1 if checked EXCEPTION is caught at the current nesting level of
try-catch blocks, OR is listed in the `throws' clause of the
current method. */
static int
check_thrown_exceptions_do (exception)
tree exception;
{
tree list = currently_caught_type_list;
resolve_and_layout (exception, NULL_TREE);
/* First, all the nested try-catch-finally at that stage. The
last element contains `throws' clause exceptions, if any. */
if (IS_UNCHECKED_EXCEPTION_P (exception))
return 1;
while (list)
{
tree caught;
for (caught = TREE_VALUE (list); caught; caught = TREE_CHAIN (caught))
if (valid_ref_assignconv_cast_p (exception, TREE_VALUE (caught), 0))
return 1;
list = TREE_CHAIN (list);
}
return 0;
}
static void
purge_unchecked_exceptions (mdecl)
tree mdecl;
{
tree throws = DECL_FUNCTION_THROWS (mdecl);
tree new = NULL_TREE;
while (throws)
{
tree next = TREE_CHAIN (throws);
if (!IS_UNCHECKED_EXCEPTION_P (TREE_VALUE (throws)))
{
TREE_CHAIN (throws) = new;
new = throws;
}
throws = next;
}
/* List is inverted here, but it doesn't matter */
DECL_FUNCTION_THROWS (mdecl) = new;
}
/* 15.24 Conditional Operator ?: */
static tree
patch_conditional_expr (node, wfl_cond, wfl_op1)
tree node, wfl_cond, wfl_op1;
{
tree cond = TREE_OPERAND (node, 0);
tree op1 = TREE_OPERAND (node, 1);
tree op2 = TREE_OPERAND (node, 2);
tree resulting_type = NULL_TREE;
tree t1, t2, patched;
int error_found = 0;
/* Operands of ?: might be StringBuffers crafted as a result of a
string concatenation. Obtain a descent operand here. */
if ((patched = patch_string (op1)))
TREE_OPERAND (node, 1) = op1 = patched;
if ((patched = patch_string (op2)))
TREE_OPERAND (node, 2) = op2 = patched;
t1 = TREE_TYPE (op1);
t2 = TREE_TYPE (op2);
/* The first expression must be a boolean */
if (TREE_TYPE (cond) != boolean_type_node)
{
SET_WFL_OPERATOR (wfl_operator, node, wfl_cond);
parse_error_context (wfl_operator, "Incompatible type for `?:'. Can't "
"convert `%s' to `boolean'",
lang_printable_name (TREE_TYPE (cond), 0));
error_found = 1;
}
/* Second and third can be numeric, boolean (i.e. primitive),
references or null. Anything else results in an error */
if (!((JNUMERIC_TYPE_P (t1) && JNUMERIC_TYPE_P (t2))
|| ((JREFERENCE_TYPE_P (t1) || op1 == null_pointer_node)
&& (JREFERENCE_TYPE_P (t2) || op2 == null_pointer_node))
|| (t1 == boolean_type_node && t2 == boolean_type_node)))
error_found = 1;
/* Determine the type of the conditional expression. Same types are
easy to deal with */
else if (t1 == t2)
resulting_type = t1;
/* There are different rules for numeric types */
else if (JNUMERIC_TYPE_P (t1))
{
/* if byte/short found, the resulting type is short */
if ((t1 == byte_type_node && t2 == short_type_node)
|| (t1 == short_type_node && t2 == byte_type_node))
resulting_type = short_type_node;
/* If t1 is a constant int and t2 is of type byte, short or char
and t1's value fits in t2, then the resulting type is t2 */
else if ((t1 == int_type_node && TREE_CONSTANT (TREE_OPERAND (node, 1)))
&& JBSC_TYPE_P (t2) && int_fits_type_p (TREE_OPERAND (node, 1), t2))
resulting_type = t2;
/* If t2 is a constant int and t1 is of type byte, short or char
and t2's value fits in t1, then the resulting type is t1 */
else if ((t2 == int_type_node && TREE_CONSTANT (TREE_OPERAND (node, 2)))
&& JBSC_TYPE_P (t1) && int_fits_type_p (TREE_OPERAND (node, 2), t1))
resulting_type = t1;
/* Otherwise, binary numeric promotion is applied and the
resulting type is the promoted type of operand 1 and 2 */
else
resulting_type = binary_numeric_promotion (t1, t2,
&TREE_OPERAND (node, 1),
&TREE_OPERAND (node, 2));
}
/* Cases of a reference and a null type */
else if (JREFERENCE_TYPE_P (t1) && op2 == null_pointer_node)
resulting_type = t1;
else if (JREFERENCE_TYPE_P (t2) && op1 == null_pointer_node)
resulting_type = t2;
/* Last case: different reference types. If a type can be converted
into the other one by assignment conversion, the latter
determines the type of the expression */
else if ((resulting_type = try_reference_assignconv (t1, op2)))
resulting_type = promote_type (t1);
else if ((resulting_type = try_reference_assignconv (t2, op1)))
resulting_type = promote_type (t2);
/* If we don't have any resulting type, we're in trouble */
if (!resulting_type)
{
char *t = strdup (lang_printable_name (t1, 0));
SET_WFL_OPERATOR (wfl_operator, node, wfl_op1);
parse_error_context (wfl_operator, "Incompatible type for `?:'. Can't "
"convert `%s' to `%s'", t,
lang_printable_name (t2, 0));
free (t);
error_found = 1;
}
if (error_found)
{
TREE_TYPE (node) = error_mark_node;
return error_mark_node;
}
TREE_TYPE (node) = resulting_type;
TREE_SET_CODE (node, COND_EXPR);
CAN_COMPLETE_NORMALLY (node) = 1;
return node;
}
/* Try to constant fold NODE.
If NODE is not a constant expression, return NULL_EXPR.
CONTEXT is a static final VAR_DECL whose initializer we are folding. */
static tree
fold_constant_for_init (node, context)
tree node;
tree context;
{
tree op0, op1, val;
enum tree_code code = TREE_CODE (node);
if (code == STRING_CST)
return node;
if (code == INTEGER_CST || code == REAL_CST)
return convert (TREE_TYPE (context), node);
if (TREE_TYPE (node) != NULL_TREE && code != VAR_DECL && code != FIELD_DECL)
return NULL_TREE;
switch (code)
{
case PLUS_EXPR:
case MINUS_EXPR:
case MULT_EXPR:
case TRUNC_MOD_EXPR:
case RDIV_EXPR:
case LSHIFT_EXPR:
case RSHIFT_EXPR:
case URSHIFT_EXPR:
case BIT_AND_EXPR:
case BIT_XOR_EXPR:
case BIT_IOR_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_ORIF_EXPR:
case EQ_EXPR:
case NE_EXPR:
case GT_EXPR:
case GE_EXPR:
case LT_EXPR:
case LE_EXPR:
op0 = TREE_OPERAND (node, 0);
op1 = TREE_OPERAND (node, 1);
val = fold_constant_for_init (op0, context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 0) = val;
val = fold_constant_for_init (op1, context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 1) = val;
return patch_binop (node, op0, op1);
case UNARY_PLUS_EXPR:
case NEGATE_EXPR:
case TRUTH_NOT_EXPR:
case BIT_NOT_EXPR:
case CONVERT_EXPR:
op0 = TREE_OPERAND (node, 0);
val = fold_constant_for_init (op0, context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 0) = val;
return patch_unaryop (node, op0);
break;
case COND_EXPR:
val = fold_constant_for_init (TREE_OPERAND (node, 0), context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 0) = val;
val = fold_constant_for_init (TREE_OPERAND (node, 1), context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 1) = val;
val = fold_constant_for_init (TREE_OPERAND (node, 2), context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 2) = val;
return integer_zerop (TREE_OPERAND (node, 0)) ? TREE_OPERAND (node, 1)
: TREE_OPERAND (node, 2);
case VAR_DECL:
case FIELD_DECL:
if (! FIELD_FINAL (node)
|| DECL_INITIAL (node) == NULL_TREE)
return NULL_TREE;
val = DECL_INITIAL (node);
/* Guard against infinite recursion. */
DECL_INITIAL (node) = NULL_TREE;
val = fold_constant_for_init (val, node);
DECL_INITIAL (node) = val;
return val;
case EXPR_WITH_FILE_LOCATION:
/* Compare java_complete_tree and resolve_expression_name. */
if (!EXPR_WFL_NODE (node) /* Or a PRIMARY flag ? */
|| TREE_CODE (EXPR_WFL_NODE (node)) == IDENTIFIER_NODE)
{
tree name = EXPR_WFL_NODE (node);
tree decl;
if (PRIMARY_P (node))
return NULL_TREE;
else if (! QUALIFIED_P (name))
{
decl = lookup_field_wrapper (DECL_CONTEXT (context), name);
if (decl == NULL_TREE
|| (! FIELD_STATIC (decl) && ! FIELD_FINAL (decl)))
return NULL_TREE;
return fold_constant_for_init (decl, decl);
}
else
{
/* Wait until the USE_COMPONENT_REF re-write. FIXME. */
qualify_ambiguous_name (node);
if (resolve_field_access (node, &decl, NULL)
&& decl != NULL_TREE)
return fold_constant_for_init (decl, decl);
return NULL_TREE;
}
}
else
{
op0 = TREE_OPERAND (node, 0);
val = fold_constant_for_init (op0, context);
if (val == NULL_TREE || ! TREE_CONSTANT (val))
return NULL_TREE;
TREE_OPERAND (node, 0) = val;
return val;
}
#ifdef USE_COMPONENT_REF
case IDENTIFIER:
case COMPONENT_REF:
?;
#endif
default:
return NULL_TREE;
}
}
#ifdef USE_COMPONENT_REF
/* Context is 'T' for TypeName, 'P' for PackageName,
'M' for MethodName, 'E' for ExpressionName, and 'A' for AmbiguousName. */
tree
resolve_simple_name (name, context)
tree name;
int context;
{
}
tree
resolve_qualified_name (name, context)
tree name;
int context;
{
}
#endif
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