40 lines
972 B
C++
40 lines
972 B
C++
#ifndef _COMPILE_ASSERT_H
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#define _COMPILE_ASSERT_H
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/*
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* This is a simple compile time assertion tool taken from:
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* http://blogs.msdn.com/b/abhinaba/archive/2008/10/27/c-c-compile-time-asserts.aspx
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* written by Abhinaba Basu!
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*
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* Thanks!
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*/
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#ifdef __cplusplus
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#define JOIN( X, Y ) JOIN2(X,Y)
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#define JOIN2( X, Y ) X##Y
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namespace static_assert_compat
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{
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template <bool> struct STATIC_ASSERT_FAILURE;
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template <> struct STATIC_ASSERT_FAILURE<true> { enum { value = 1 }; };
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template<int x> struct static_assert_test{};
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}
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#define COMPILE_ASSERT(x) \
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typedef ::static_assert_compat::static_assert_test<\
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sizeof(::static_assert_compat::STATIC_ASSERT_FAILURE< (bool)( x ) >)>\
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JOIN(_static_assert_typedef, __LINE__)
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#else // __cplusplus
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#define COMPILE_ASSERT(x) extern int __dummy[(int)x]
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#endif // __cplusplus
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#define VERIFY_EXPLICIT_CAST(from, to) COMPILE_ASSERT(sizeof(from) == sizeof(to))
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// _COMPILE_ASSERT_H_
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#endif
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