24 lines
870 B
C
24 lines
870 B
C
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//static_assert.h
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//portable solution compatible with C++98
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#if (__cplusplus < 201103L) //std < C++11
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//source http://www.pixelbeat.org/programming/gcc/STATIC_ASSERT.html
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#define ASSERT_CONCAT_(a, b) a##b
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#define ASSERT_CONCAT(a, b) ASSERT_CONCAT_(a, b)
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// These can't be used after statements in c89.
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#ifdef __COUNTER__
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#define static_assert(e,m) \
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;enum { ASSERT_CONCAT(STATIC_ASSERT_, __COUNTER__) = 1/(int)(!!(e)) }
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#else
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//This can't be used twice on the same line so ensure if using in headers
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//that the headers are not included twice (by wrapping in #ifndef...#endif)
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//Note it doesn't cause an issue when used on same line of separate modules
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//compiled with gcc -combine -fwhole-program.
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#define static_assert(e,m) \
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;enum { ASSERT_CONCAT(assert_line_, __LINE__) = 1/(int)(!!(e)) }
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#endif //__COUNTER__
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#endif //(__cplusplus < 201103L)
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