| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // template <class I1, class I2> |
| // struct min_max_result; |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <type_traits> |
| |
| #include "MoveOnly.h" |
| |
| struct A { |
| explicit A(int); |
| }; |
| // no implicit conversion |
| static_assert(!std::is_constructible_v<std::ranges::min_max_result<A>, std::ranges::min_max_result<int>>); |
| |
| struct B { |
| B(int); |
| }; |
| // implicit conversion |
| static_assert(std::is_constructible_v<std::ranges::min_max_result<B>, std::ranges::min_max_result<int>>); |
| static_assert(std::is_constructible_v<std::ranges::min_max_result<B>, std::ranges::min_max_result<int>&>); |
| static_assert(std::is_constructible_v<std::ranges::min_max_result<B>, const std::ranges::min_max_result<int>>); |
| static_assert(std::is_constructible_v<std::ranges::min_max_result<B>, const std::ranges::min_max_result<int>&>); |
| |
| struct C { |
| C(int&); |
| }; |
| static_assert(!std::is_constructible_v<std::ranges::min_max_result<C>, std::ranges::min_max_result<int>&>); |
| |
| // has to be convertible via const& |
| static_assert(std::is_convertible_v<std::ranges::min_max_result<int>&, std::ranges::min_max_result<long>>); |
| static_assert(std::is_convertible_v<const std::ranges::min_max_result<int>&, std::ranges::min_max_result<long>>); |
| static_assert(std::is_convertible_v<std::ranges::min_max_result<int>&&, std::ranges::min_max_result<long>>); |
| static_assert(std::is_convertible_v<const std::ranges::min_max_result<int>&&, std::ranges::min_max_result<long>>); |
| |
| // should be move constructible |
| static_assert(std::is_move_constructible_v<std::ranges::min_max_result<MoveOnly>>); |
| |
| // should not be copy constructible |
| static_assert(!std::is_copy_constructible_v<std::ranges::min_max_result<MoveOnly>>); |
| |
| struct NotConvertible {}; |
| // conversions should not work if there is no conversion |
| static_assert(!std::is_convertible_v<std::ranges::min_max_result<NotConvertible>, std::ranges::min_max_result<int>>); |
| |
| template <class T> |
| struct ConvertibleFrom { |
| constexpr ConvertibleFrom(T c) : content{c} {} |
| T content; |
| }; |
| |
| constexpr bool test() { |
| { |
| std::ranges::min_max_result<double> res{10, 1}; |
| assert(res.min == 10); |
| assert(res.max == 1); |
| std::ranges::min_max_result<ConvertibleFrom<int>> res2 = res; |
| assert(res2.min.content == 10); |
| assert(res2.max.content == 1); |
| } |
| { |
| std::ranges::min_max_result<MoveOnly> res{MoveOnly{}, MoveOnly{}}; |
| assert(res.min.get() == 1); |
| assert(res.max.get() == 1); |
| auto res2 = std::move(res); |
| assert(res.min.get() == 0); |
| assert(res.max.get() == 0); |
| assert(res2.min.get() == 1); |
| assert(res2.max.get() == 1); |
| } |
| { |
| auto [min, max] = std::ranges::min_max_result<int>{1, 2}; |
| assert(min == 1); |
| assert(max == 2); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |