prime/include/static_assert.hpp

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2022-08-13 01:26:00 +00:00
// C++98 static assert
template < bool expr >
struct do_static_assert;
template <>
struct do_static_assert< true > {
static const char test;
};
struct false_type {
static const bool value = false;
};
struct true_type {
static const bool value = true;
};
template < int A, int B >
struct _n_is_equal : false_type {};
template < int A >
struct _n_is_equal< A, A > : true_type {};
template < class T, int N >
struct check_sizeof : _n_is_equal< sizeof(T), N > {};
#ifdef __MWERKS__
#define CHECK_SIZEOF(cls, size) \
static void cls##_check() { do_static_assert< check_sizeof< cls, size >::value >::test; }
#else
#define CHECK_SIZEOF(cls, size)
#endif