cxx/test/utilities/meta/meta.rel/is_same.pass.cpp

60 lines
1.4 KiB
C++
Raw Normal View History

//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// type_traits
// is_same
#include <type_traits>
template <class T, class U>
void test_is_same()
{
static_assert((std::is_same<T, U>::value), "");
static_assert((!std::is_same<const T, U>::value), "");
static_assert((!std::is_same<T, const U>::value), "");
static_assert((std::is_same<const T, const U>::value), "");
}
template <class T, class U>
void test_is_same_ref()
{
static_assert((std::is_same<T, U>::value), "");
static_assert((std::is_same<const T, U>::value), "");
static_assert((std::is_same<T, const U>::value), "");
static_assert((std::is_same<const T, const U>::value), "");
}
template <class T, class U>
void test_is_not_same()
{
static_assert((!std::is_same<T, U>::value), "");
}
class Class
{
public:
~Class();
};
int main()
{
test_is_same<int, int>();
test_is_same<void, void>();
test_is_same<Class, Class>();
test_is_same<int*, int*>();
test_is_same_ref<int&, int&>();
test_is_not_same<int, void>();
test_is_not_same<void, Class>();
test_is_not_same<Class, int*>();
test_is_not_same<int*, int&>();
test_is_not_same<int&, int>();
}