82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
|
|
// add_pointer
|
|
// If T names a referenceable type or a (possibly cv-qualified) void type then
|
|
// the member typedef type shall name the same type as remove_reference_t<T>*;
|
|
// otherwise, type shall name T.
|
|
|
|
#include <type_traits>
|
|
#include "test_macros.h"
|
|
|
|
template <class T, class U>
|
|
void test_add_pointer()
|
|
{
|
|
ASSERT_SAME_TYPE(U, typename std::add_pointer<T>::type);
|
|
#if TEST_STD_VER > 11
|
|
ASSERT_SAME_TYPE(U, std::add_pointer_t<T>);
|
|
#endif
|
|
}
|
|
|
|
template <class F>
|
|
void test_function0()
|
|
{
|
|
ASSERT_SAME_TYPE(F*, typename std::add_pointer<F>::type);
|
|
#if TEST_STD_VER > 11
|
|
ASSERT_SAME_TYPE(F*, std::add_pointer_t<F>);
|
|
#endif
|
|
}
|
|
|
|
template <class F>
|
|
void test_function1()
|
|
{
|
|
ASSERT_SAME_TYPE(F, typename std::add_pointer<F>::type);
|
|
#if TEST_STD_VER > 11
|
|
ASSERT_SAME_TYPE(F, std::add_pointer_t<F>);
|
|
#endif
|
|
}
|
|
|
|
struct Foo {};
|
|
|
|
int main(int, char**)
|
|
{
|
|
test_add_pointer<void, void*>();
|
|
test_add_pointer<int, int*>();
|
|
test_add_pointer<int[3], int(*)[3]>();
|
|
test_add_pointer<int&, int*>();
|
|
test_add_pointer<const int&, const int*>();
|
|
test_add_pointer<int*, int**>();
|
|
test_add_pointer<const int*, const int**>();
|
|
test_add_pointer<Foo, Foo*>();
|
|
|
|
// LWG 2101 specifically talks about add_pointer and functions.
|
|
// The term of art is "a referenceable type", which a cv- or ref-qualified function is not.
|
|
test_function0<void()>();
|
|
#if TEST_STD_VER >= 11
|
|
test_function1<void() const>();
|
|
test_function1<void() &>();
|
|
test_function1<void() &&>();
|
|
test_function1<void() const &>();
|
|
test_function1<void() const &&>();
|
|
#endif
|
|
|
|
// But a cv- or ref-qualified member function *is* "a referenceable type"
|
|
test_function0<void (Foo::*)()>();
|
|
#if TEST_STD_VER >= 11
|
|
test_function0<void (Foo::*)() const>();
|
|
test_function0<void (Foo::*)() &>();
|
|
test_function0<void (Foo::*)() &&>();
|
|
test_function0<void (Foo::*)() const &>();
|
|
test_function0<void (Foo::*)() const &&>();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|