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Add a workaround for compilers without __COUNTER__

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This can make GCC pretty noisey, complaining "declaration does not declare
anything" for each static_assert, but it should still function on such older
compilers.
This commit is contained in:
Chris Robinson
2014-11-07 19:40:11 -08:00
parent b34a374fa7
commit 907cd3dd01
1 changed files with 3 additions and 1 deletions
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include/static_assert.h
+3 -1
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@@ -7,10 +7,12 @@
#ifndef static_assert
#ifdef HAVE_C11_STATIC_ASSERT
#define static_assert _Static_assert
#else
#elif defined(__COUNTER__)
#define CTASTR2(_pre,_post) _pre##_post
#define CTASTR(_pre,_post) CTASTR2(_pre,_post)
#define static_assert(_cond, _msg) typedef struct { int CTASTR(static_assert_failed_at_line_,__LINE__) : !!(_cond); } CTASTR(static_assertion_,__COUNTER__)
#else
#define static_assert(_cond, _msg) struct { int CTASTR(static_assert_failed_at_line_,__LINE__) : !!(_cond); }
#endif
#endif