| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <queue> |
| // UNSUPPORTED: c++03, c++11, c++14 |
| |
| // template<class Container> |
| // queue(Container) -> queue<typename Container::value_type, Container>; |
| // |
| // template<class Container, class Allocator> |
| // queue(Container, Allocator) -> queue<typename Container::value_type, Container>; |
| // |
| // template<ranges::input_range R> |
| // queue(from_range_t, R&&) -> queue<ranges::range_value_t<R>>; // since C++23 |
| // |
| // template<ranges::input_range R, class Allocator> |
| // queue(from_range_t, R&&, Allocator) |
| // -> queue<ranges::range_value_t<R>, deque<ranges::range_value_t<R>, Allocator>>; // since C++23 |
| |
| #include <array> |
| #include <queue> |
| #include <list> |
| #include <iterator> |
| #include <cassert> |
| #include <cstddef> |
| |
| #include "deduction_guides_sfinae_checks.h" |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| #include "test_allocator.h" |
| |
| struct A {}; |
| |
| int main(int, char**) |
| { |
| |
| // Test the explicit deduction guides |
| { |
| std::list<int> l{0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; |
| std::queue que(l); |
| |
| static_assert(std::is_same_v<decltype(que), std::queue<int, std::list<int>>>, ""); |
| assert(que.size() == l.size()); |
| assert(que.back() == l.back()); |
| } |
| |
| { |
| std::list<long, test_allocator<long>> l{10, 11, 12, 13, 14, 15, 16, 17, 18, 19 }; |
| std::queue que(l, test_allocator<long>(0,2)); // different allocator |
| static_assert(std::is_same_v<decltype(que)::container_type, std::list<long, test_allocator<long>>>, ""); |
| static_assert(std::is_same_v<decltype(que)::value_type, long>, ""); |
| assert(que.size() == 10); |
| assert(que.back() == 19); |
| // I'd like to assert that we've gotten the right allocator in the queue, but |
| // I don't know how to get at the underlying container. |
| } |
| |
| // Test the implicit deduction guides |
| { |
| // We don't expect this one to work - no way to implicitly get value_type |
| // std::queue que(std::allocator<int>()); // queue (allocator &) |
| } |
| |
| { |
| std::queue<A> source; |
| std::queue que(source); // queue(queue &) |
| static_assert(std::is_same_v<decltype(que)::value_type, A>, ""); |
| static_assert(std::is_same_v<decltype(que)::container_type, std::deque<A>>, ""); |
| assert(que.size() == 0); |
| } |
| |
| { |
| typedef short T; |
| typedef test_allocator<T> Alloc; |
| typedef std::list<T, Alloc> Cont; |
| typedef test_allocator<int> ConvertibleToAlloc; |
| static_assert(std::uses_allocator_v<Cont, ConvertibleToAlloc> && |
| !std::is_same_v<typename Cont::allocator_type, ConvertibleToAlloc>); |
| |
| { |
| Cont cont; |
| std::queue que(cont, Alloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| Cont cont; |
| std::queue que(cont, ConvertibleToAlloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| Cont cont; |
| std::queue que(std::move(cont), Alloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| Cont cont; |
| std::queue que(std::move(cont), ConvertibleToAlloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| } |
| |
| { |
| typedef short T; |
| typedef test_allocator<T> Alloc; |
| typedef std::list<T, Alloc> Cont; |
| typedef test_allocator<int> ConvertibleToAlloc; |
| static_assert(std::uses_allocator_v<Cont, ConvertibleToAlloc> && |
| !std::is_same_v<typename Cont::allocator_type, ConvertibleToAlloc>); |
| |
| { |
| std::queue<T, Cont> source; |
| std::queue que(source, Alloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| std::queue<T, Cont> source; |
| std::queue que(source, ConvertibleToAlloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| std::queue<T, Cont> source; |
| std::queue que(std::move(source), Alloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| |
| { |
| std::queue<T, Cont> source; |
| std::queue que(std::move(source), ConvertibleToAlloc(2)); |
| static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>); |
| } |
| } |
| |
| #if TEST_STD_VER >= 23 |
| { |
| typedef short T; |
| typedef test_allocator<T> Alloc; |
| std::list<T> a; |
| { |
| std::queue q(a.begin(), a.end()); |
| static_assert(std::is_same_v<decltype(q), std::queue<T>>); |
| } |
| { |
| std::queue q(a.begin(), a.end(), Alloc()); |
| static_assert(std::is_same_v<decltype(q), std::queue<T, std::deque<T, Alloc>>>); |
| } |
| } |
| |
| { |
| { |
| std::queue c(std::from_range, std::array<int, 0>()); |
| static_assert(std::is_same_v<decltype(c), std::queue<int>>); |
| } |
| |
| { |
| using Alloc = test_allocator<int>; |
| std::queue c(std::from_range, std::array<int, 0>(), Alloc()); |
| static_assert(std::is_same_v<decltype(c), std::queue<int, std::deque<int, Alloc>>>); |
| } |
| } |
| #endif |
| |
| ContainerAdaptorDeductionGuidesSfinaeAway<std::queue, std::queue<int>>(); |
| |
| return 0; |
| } |