207bf4854d
* c-common.c (c_expand_expr_stmt): Apply default conversions to non-lvalue arrays if C99. * c-typeck.c (default_conversion): Split out code handling array-to-pointer and function-to-pointer conversions into a separate default_function_array_conversion function. (default_function_array_conversion): New function. Keep track of whether any NON_LVALUE_EXPRs were stripped. Return non-lvalue arrays unchanged outside C99 mode instead of giving an error for them. (build_component_ref): Use pedantic_non_lvalue when handling COMPOUND_EXPR. Don't handle COND_EXPR specially. (convert_arguments): Use default_function_array_conversion. (build_unary_op): For ADDR_EXPR, take a flag indicating whether non-lvalues are OK. (unary_complex_lvalue): Likewise. (internal_build_compound_expr): Use default_function_array_conversion. Apply default conversions to function in compound expression. (build_c_cast, build_modify_expr, digest_init, build_asm_stmt): Use default_function_array_conversion. * doc/extend.texi: Update documentation of subscripting non-lvalue arrays. Fixes PR c/461. testsuite: * gcc.dg/c90-array-lval-1.c, gcc.dg/c90-array-lval-2.c, gcc.dg/c99-array-lval-1.c, gcc.dg/c99-array-lval-2.c: Remove XFAILs. Adjust expected error texts. * gcc.c-torture/compile/20011106-1.c, gcc.c-torture/compile/20011106-2.c, gcc.dg/c90-array-lval-3.c, gcc.dg/c90-array-lval-4.c, gcc.dg/c90-array-lval-5.c, gcc.dg/c99-array-lval-3.c, gcc.dg/c99-array-lval-4.c, gcc.dg/c99-array-lval-5.c: New tests. From-SVN: r46805
27 lines
979 B
C
27 lines
979 B
C
/* Test for non-lvalue arrays decaying to pointers: in C99 only.
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Test various ways of producing non-lvalue arrays. */
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/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
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/* { dg-do compile } */
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/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
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struct s { char c[17]; };
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struct s x;
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struct s a, b, c;
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int d;
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#define ASSERT(v, a) char v[((a) ? 1 : -1)]
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ASSERT (p, sizeof (x.c) == 17);
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ASSERT (q, sizeof (0, x.c) == sizeof (char *));
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ASSERT (r0, sizeof ((d ? b : c).c) == 17);
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ASSERT (r1, sizeof ((d, b).c) == 17);
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ASSERT (r2, sizeof ((a = b).c) == 17);
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/* The non-lvalue array does not decay to a pointer, so the comma expression
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has (non-lvalue) array type.
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*/
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ASSERT (s0, sizeof (0, (d ? b : c).c) == 17); /* { dg-bogus "array" "bad non-lvalue array handling" } */
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ASSERT (s0, sizeof (0, (d, b).c) == 17); /* { dg-bogus "array" "bad non-lvalue array handling" } */
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ASSERT (s0, sizeof (0, (a = b).c) == 17); /* { dg-bogus "array" "bad non-lvalue array handling" } */
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