104 lines
3.7 KiB
C++
104 lines
3.7 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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// UNSUPPORTED: c++98, c++03
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// <utility>
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// template <class T1, class T2> struct pair
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// template<class U, class V> pair(U&& x, V&& y);
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#include <utility>
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#include <memory>
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#include <cassert>
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#include "archetypes.h"
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#include "test_convertible.h"
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#include "test_macros.h"
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using namespace ImplicitTypes; // Get implicitly archetypes
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template <class T1, class T1Arg,
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bool CanCopy = true, bool CanConvert = CanCopy>
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void test_sfinae() {
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using P1 = std::pair<T1, int>;
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using P2 = std::pair<int, T1>;
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using T2 = int const&;
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static_assert(std::is_constructible<P1, T1Arg, T2>::value == CanCopy, "");
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static_assert(test_convertible<P1, T1Arg, T2>() == CanConvert, "");
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static_assert(std::is_constructible<P2, T2, T1Arg>::value == CanCopy, "");
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static_assert(test_convertible<P2, T2, T1Arg>() == CanConvert, "");
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}
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struct ExplicitT {
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constexpr explicit ExplicitT(int x) : value(x) {}
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int value;
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};
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struct ImplicitT {
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constexpr ImplicitT(int x) : value(x) {}
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int value;
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};
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int main(int, char**)
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{
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{
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typedef std::pair<std::unique_ptr<int>, short*> P;
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P p(std::unique_ptr<int>(new int(3)), nullptr);
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assert(*p.first == 3);
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assert(p.second == nullptr);
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}
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{
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// Test non-const lvalue and rvalue types
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test_sfinae<AllCtors, AllCtors&>();
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test_sfinae<AllCtors, AllCtors&&>();
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test_sfinae<ExplicitTypes::AllCtors, ExplicitTypes::AllCtors&, true, false>();
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test_sfinae<ExplicitTypes::AllCtors, ExplicitTypes::AllCtors&&, true, false>();
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test_sfinae<CopyOnly, CopyOnly&>();
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test_sfinae<CopyOnly, CopyOnly&&>();
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test_sfinae<ExplicitTypes::CopyOnly, ExplicitTypes::CopyOnly&, true, false>();
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test_sfinae<ExplicitTypes::CopyOnly, ExplicitTypes::CopyOnly&&, true, false>();
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test_sfinae<MoveOnly, MoveOnly&, false>();
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test_sfinae<MoveOnly, MoveOnly&&>();
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test_sfinae<ExplicitTypes::MoveOnly, ExplicitTypes::MoveOnly&, false>();
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test_sfinae<ExplicitTypes::MoveOnly, ExplicitTypes::MoveOnly&&, true, false>();
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test_sfinae<NonCopyable, NonCopyable&, false>();
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test_sfinae<NonCopyable, NonCopyable&&, false>();
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test_sfinae<ExplicitTypes::NonCopyable, ExplicitTypes::NonCopyable&, false>();
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test_sfinae<ExplicitTypes::NonCopyable, ExplicitTypes::NonCopyable&&, false>();
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}
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{
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// Test converting types
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test_sfinae<ConvertingType, int&>();
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test_sfinae<ConvertingType, const int&>();
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test_sfinae<ConvertingType, int&&>();
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test_sfinae<ConvertingType, const int&&>();
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test_sfinae<ExplicitTypes::ConvertingType, int&, true, false>();
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test_sfinae<ExplicitTypes::ConvertingType, const int&, true, false>();
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test_sfinae<ExplicitTypes::ConvertingType, int&&, true, false>();
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test_sfinae<ExplicitTypes::ConvertingType, const int&&, true, false>();
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}
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#if TEST_STD_VER > 11
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{ // explicit constexpr test
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constexpr std::pair<ExplicitT, ExplicitT> p(42, 43);
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static_assert(p.first.value == 42, "");
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static_assert(p.second.value == 43, "");
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}
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{ // implicit constexpr test
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constexpr std::pair<ImplicitT, ImplicitT> p = {42, 43};
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static_assert(p.first.value == 42, "");
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static_assert(p.second.value == 43, "");
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}
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#endif
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return 0;
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}
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