[Bug 25945] C_ASSERT doesn't fail if given non-constant expression
wine-bugs at winehq.org
wine-bugs at winehq.org
Wed Feb 2 10:34:34 CST 2011
http://bugs.winehq.org/show_bug.cgi?id=25945
--- Comment #2 from Alexander Scott-Johns <alexander.scott.johns+winebug at googlemail.com> 2011-02-02 10:34:34 CST ---
According to the GCC documentation, GCC 2.95 supports array designators and
(rvalue) array literals. And according to the c1x draft, <assert.h> should
define a static_assert macro. So this should work:
#if defined(static_assert)
# define C_ASSERT(e) static_assert((e), #e " should be true")
#elif defined(_MSC_VER)
# define C_ASSERT(e) typedef char __C_ASSERT__[(e)?1:-1]
#else
# define C_ASSERT(e) \
extern void __C_ASSERT__(int [sizeof((char[]){ [-!(e)] = 0 })])
#endif
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