cxx/test/utilities/meta/meta.hel/integral_constant.pass.cpp

39 lines
1.2 KiB
C++

//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// type_traits
// integral_constant
#include <type_traits>
#include <cassert>
int main()
{
typedef std::integral_constant<int, 5> _5;
static_assert(_5::value == 5, "");
static_assert((std::is_same<_5::value_type, int>::value), "");
static_assert((std::is_same<_5::type, _5>::value), "");
static_assert((_5() == 5), "");
static_assert(std::false_type::value == false, "");
static_assert((std::is_same<std::false_type::value_type, bool>::value), "");
static_assert((std::is_same<std::false_type::type, std::false_type>::value), "");
static_assert(std::true_type::value == true, "");
static_assert((std::is_same<std::true_type::value_type, bool>::value), "");
static_assert((std::is_same<std::true_type::type, std::true_type>::value), "");
std::false_type f1;
std::false_type f2 = f1;
std::true_type t1;
std::true_type t2 = t1;
}