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Silence 'unused typedef' warning for STATIC_ASSERT()

This commit is contained in:
kwolekr 2015-11-03 01:03:33 -05:00
parent c2b5da735e
commit 6ba4f3775e
1 changed files with 8 additions and 1 deletions
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9
src/util/basic_macros.h
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@ -38,9 +38,16 @@ with this program; if not, write to the Free Software Foundation, Inc.,
C(const C &); \
C &operator=(const C &)
#ifndef _MSC_VER
#define UNUSED_ATTRIBUTE __attribute__ ((unused))
#else
#define UNUSED_ATTRIBUTE
#endif
// Fail compilation if condition expr is not met.
// Note that 'msg' must follow the format of a valid identifier, e.g.
// STATIC_ASSERT(sizeof(foobar_t) == 40), foobar_t_is_wrong_size);
#define STATIC_ASSERT(expr, msg) typedef char msg[!!(expr) * 2 - 1]
#define STATIC_ASSERT(expr, msg) \
UNUSED_ATTRIBUTE typedef char msg[!!(expr) * 2 - 1]
#endif