is_signed.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// type_traits
// is_signed
#include <type_traits>
#include "test_macros.h"
template <class T>
void test_is_signed()
{
static_assert( std::is_signed<T>::value, "");
static_assert( std::is_signed<const T>::value, "");
static_assert( std::is_signed<volatile T>::value, "");
static_assert( std::is_signed<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert( std::is_signed_v<T>, "");
static_assert( std::is_signed_v<const T>, "");
static_assert( std::is_signed_v<volatile T>, "");
static_assert( std::is_signed_v<const volatile T>, "");
#endif
}
template <class T>
void test_is_not_signed()
{
static_assert(!std::is_signed<T>::value, "");
static_assert(!std::is_signed<const T>::value, "");
static_assert(!std::is_signed<volatile T>::value, "");
static_assert(!std::is_signed<const volatile T>::value, "");
#if TEST_STD_VER > 14
static_assert(!std::is_signed_v<T>, "");
static_assert(!std::is_signed_v<const T>, "");
static_assert(!std::is_signed_v<volatile T>, "");
static_assert(!std::is_signed_v<const volatile T>, "");
#endif
}
class Class
{
public:
~Class();
};
struct A; // incomplete
int main(int, char**)
{
test_is_not_signed<void>();
test_is_not_signed<int&>();
test_is_not_signed<Class>();
test_is_not_signed<int*>();
test_is_not_signed<const int*>();
test_is_not_signed<char[3]>();
test_is_not_signed<char[]>();
test_is_not_signed<bool>();
test_is_not_signed<unsigned>();
test_is_not_signed<A>();
test_is_signed<int>();
test_is_signed<double>();
#ifndef _LIBCPP_HAS_NO_INT128
test_is_signed<__int128_t>();
test_is_not_signed<__uint128_t>();
#endif
return 0;
}