8sa1-gcc/gcc/testsuite/c-c++-common/cpp/pr93452-1.c
Nathan Sidwell 3d056cbfb3 preprocessor: Make __has_include a builtin macro [PR93452]
The clever hack of '#define __has_include __has_include' breaks -dD
and -fdirectives-only, because that emits definitions.  This turns
__has_include into a proper builtin macro.  Thus it's never emitted
via -dD, and because use outside of directive processing is undefined,
we can just expand it anywhere.

	PR preprocessor/93452
	* internal.h (struct spec_nodes): Drop n__has_include{,_next}.
	* directives.c (lex_macro_node): Don't check __has_include redef.
	* expr.c (eval_token): Drop __has_include eval.
	(parse_has_include): Move to ...
	* macro.c (builtin_has_include): ... here.
	(_cpp_builtin_macro_text): Eval __has_include{,_next}.
	* include/cpplib.h (enum cpp_builtin_type): Add BT_HAS_INCLUDE{,_NEXT}.
	* init.c (builtin_array): Add them.
	(cpp_init_builtins): Drop __has_include{,_next} init here ...
	* pch.c (cpp_read_state): ... and here.
	* traditional.c (enum ls): Drop has_include states ...
	(_cpp_scan_out_logical_line): ... and here.
2020-01-28 08:02:17 -08:00

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C

/* { dg-do preprocess } */
/* { dg-additional-options "-fdirectives-only" } */
int main ()
{
return 0;
}
/* A regexp that doesn't match itself! */
/* { dg-final { scan-file-not pr93452-1.i {_[_]has_include} } } */