blocxx

StaticAssert.hpp

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00032 
00033 #ifndef BLOCXX_STATIC_ASSERT_HPP_INCLUDE_GUARD_
00034 #define BLOCXX_STATIC_ASSERT_HPP_INCLUDE_GUARD_
00035 
00036 
00038 
00039 #include "blocxx/BLOCXX_config.h"
00040 
00041 namespace BLOCXX_NAMESPACE
00042 {
00043    template <bool x> struct StaticAssertionFailure;
00044 
00045    template <>
00046    struct StaticAssertionFailure<true>
00047    {
00048    };
00049 }
00050 
00051 // Need this first macro because ## doesn't expand vars, and we need an intermediate step
00052 #define BLOCXX_STATIC_ASSERT_CAT(a, b) a ## b
00053 #define BLOCXX_STATIC_ASSERT_AUX(a, b) BLOCXX_STATIC_ASSERT_CAT(a, b)
00054 
00055 #define BLOCXX_STATIC_ASSERT( B ) \
00056 enum { \
00057    BLOCXX_STATIC_ASSERT_AUX(blocxx_static_assert_enum_, __LINE__) \
00058    = sizeof( ::blocxx::StaticAssertionFailure< (bool)( B ) > ) \
00059 }
00060 
00061 #endif