blocxx
StaticAssert.hpp
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32
33#ifndef BLOCXX_STATIC_ASSERT_HPP_INCLUDE_GUARD_
34#define BLOCXX_STATIC_ASSERT_HPP_INCLUDE_GUARD_
35
36
38
39#include "blocxx/BLOCXX_config.h"
40
41namespace BLOCXX_NAMESPACE
42{
43 template <bool x> struct StaticAssertionFailure;
44
45 template <>
47 {
48 };
49}
50
51// Need this first macro because ## doesn't expand vars, and we need an intermediate step
52#define BLOCXX_STATIC_ASSERT_CAT(a, b) a ## b
53#define BLOCXX_STATIC_ASSERT_AUX(a, b) BLOCXX_STATIC_ASSERT_CAT(a, b)
54
55#define BLOCXX_STATIC_ASSERT( B ) \
56enum { \
57 BLOCXX_STATIC_ASSERT_AUX(blocxx_static_assert_enum_, __LINE__) \
58 = sizeof( ::blocxx::StaticAssertionFailure< (bool)( B ) > ) \
59}
60
61#endif
Taken from RFC 1321.