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82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// type_traits
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// add_pointer
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// If T names a referenceable type or a (possibly cv-qualified) void type then
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// the member typedef type shall name the same type as remove_reference_t<T>*;
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// otherwise, type shall name T.
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#include <type_traits>
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#include "test_macros.h"
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template <class T, class U>
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void test_add_pointer()
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{
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ASSERT_SAME_TYPE(U, typename std::add_pointer<T>::type);
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#if TEST_STD_VER > 11
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ASSERT_SAME_TYPE(U, std::add_pointer_t<T>);
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#endif
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}
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template <class F>
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void test_function0()
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{
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ASSERT_SAME_TYPE(F*, typename std::add_pointer<F>::type);
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#if TEST_STD_VER > 11
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ASSERT_SAME_TYPE(F*, std::add_pointer_t<F>);
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#endif
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}
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template <class F>
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void test_function1()
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{
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ASSERT_SAME_TYPE(F, typename std::add_pointer<F>::type);
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#if TEST_STD_VER > 11
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ASSERT_SAME_TYPE(F, std::add_pointer_t<F>);
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#endif
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}
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struct Foo {};
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int main(int, char**)
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{
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test_add_pointer<void, void*>();
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test_add_pointer<int, int*>();
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test_add_pointer<int[3], int(*)[3]>();
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test_add_pointer<int&, int*>();
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test_add_pointer<const int&, const int*>();
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test_add_pointer<int*, int**>();
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test_add_pointer<const int*, const int**>();
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test_add_pointer<Foo, Foo*>();
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// LWG 2101 specifically talks about add_pointer and functions.
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// The term of art is "a referenceable type", which a cv- or ref-qualified function is not.
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test_function0<void()>();
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#if TEST_STD_VER >= 11
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test_function1<void() const>();
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test_function1<void() &>();
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test_function1<void() &&>();
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test_function1<void() const &>();
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test_function1<void() const &&>();
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#endif
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// But a cv- or ref-qualified member function *is* "a referenceable type"
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test_function0<void (Foo::*)()>();
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#if TEST_STD_VER >= 11
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test_function0<void (Foo::*)() const>();
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test_function0<void (Foo::*)() &>();
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test_function0<void (Foo::*)() &&>();
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test_function0<void (Foo::*)() const &>();
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test_function0<void (Foo::*)() const &&>();
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#endif
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return 0;
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}
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