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macro: fix assert_cc() fallback

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We need two-level macro-expansion, otherwise __LINE__ will not get
evaluated.
This commit is contained in:
David Herrmann 2013-11-22 09:19:00 +01:00
parent 5476ad087c
commit b5be11e823
1 changed files with 3 additions and 1 deletions
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4
src/shared/macro.h
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@ -145,7 +145,9 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
#if defined(static_assert)
#define assert_cc(expr) static_assert(expr, #expr)
#else
#define assert_cc(expr) struct _assert_struct_ ## __LINE__ { char x[(expr) ? 0 : -1]; }
#define assert___cc(expr, line) struct _assert_struct_ ## line { char x[(expr) ? 0 : -1]; }
#define assert__cc(expr, line) assert___cc((expr), line)
#define assert_cc(expr) assert__cc((expr), __LINE__)
#endif
#define assert_return(expr, r) \