174 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <queue>10// UNSUPPORTED: c++03, c++11, c++1411 12// template<class Container>13// queue(Container) -> queue<typename Container::value_type, Container>;14//15// template<class Container, class Allocator>16// queue(Container, Allocator) -> queue<typename Container::value_type, Container>;17//18// template<ranges::input_range R>19// queue(from_range_t, R&&) -> queue<ranges::range_value_t<R>>; // since C++2320//21// template<ranges::input_range R, class Allocator>22// queue(from_range_t, R&&, Allocator)23// -> queue<ranges::range_value_t<R>, deque<ranges::range_value_t<R>, Allocator>>; // since C++2324 25#include <array>26#include <queue>27#include <list>28#include <iterator>29#include <cassert>30#include <cstddef>31 32#include "deduction_guides_sfinae_checks.h"33#include "test_macros.h"34#include "test_iterators.h"35#include "test_allocator.h"36 37struct A {};38 39int main(int, char**) {40 // Test the explicit deduction guides41 {42 std::list<int> l{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};43 std::queue que(l);44 45 static_assert(std::is_same_v<decltype(que), std::queue<int, std::list<int>>>, "");46 assert(que.size() == l.size());47 assert(que.back() == l.back());48 }49 50 {51 std::list<long, test_allocator<long>> l{10, 11, 12, 13, 14, 15, 16, 17, 18, 19};52 std::queue que(l, test_allocator<long>(0, 2)); // different allocator53 static_assert(std::is_same_v<decltype(que)::container_type, std::list<long, test_allocator<long>>>, "");54 static_assert(std::is_same_v<decltype(que)::value_type, long>, "");55 assert(que.size() == 10);56 assert(que.back() == 19);57 // I'd like to assert that we've gotten the right allocator in the queue, but58 // I don't know how to get at the underlying container.59 }60 61 // Test the implicit deduction guides62 {63 // We don't expect this one to work - no way to implicitly get value_type64 // std::queue que(std::allocator<int>()); // queue (allocator &)65 }66 67 {68 std::queue<A> source;69 std::queue que(source); // queue(queue &)70 static_assert(std::is_same_v<decltype(que)::value_type, A>, "");71 static_assert(std::is_same_v<decltype(que)::container_type, std::deque<A>>, "");72 assert(que.size() == 0);73 }74 75 {76 typedef short T;77 typedef test_allocator<T> Alloc;78 typedef std::list<T, Alloc> Cont;79 typedef test_allocator<int> ConvertibleToAlloc;80 static_assert(std::uses_allocator_v<Cont, ConvertibleToAlloc> &&81 !std::is_same_v<typename Cont::allocator_type, ConvertibleToAlloc>);82 83 {84 Cont cont;85 std::queue que(cont, Alloc(2));86 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);87 }88 89 {90 Cont cont;91 std::queue que(cont, ConvertibleToAlloc(2));92 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);93 }94 95 {96 Cont cont;97 std::queue que(std::move(cont), Alloc(2));98 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);99 }100 101 {102 Cont cont;103 std::queue que(std::move(cont), ConvertibleToAlloc(2));104 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);105 }106 }107 108 {109 typedef short T;110 typedef test_allocator<T> Alloc;111 typedef std::list<T, Alloc> Cont;112 typedef test_allocator<int> ConvertibleToAlloc;113 static_assert(std::uses_allocator_v<Cont, ConvertibleToAlloc> &&114 !std::is_same_v<typename Cont::allocator_type, ConvertibleToAlloc>);115 116 {117 std::queue<T, Cont> source;118 std::queue que(source, Alloc(2));119 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);120 }121 122 {123 std::queue<T, Cont> source;124 std::queue que(source, ConvertibleToAlloc(2));125 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);126 }127 128 {129 std::queue<T, Cont> source;130 std::queue que(std::move(source), Alloc(2));131 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);132 }133 134 {135 std::queue<T, Cont> source;136 std::queue que(std::move(source), ConvertibleToAlloc(2));137 static_assert(std::is_same_v<decltype(que), std::queue<T, Cont>>);138 }139 }140 141#if TEST_STD_VER >= 23142 {143 typedef short T;144 typedef test_allocator<T> Alloc;145 std::list<T> a;146 {147 std::queue q(a.begin(), a.end());148 static_assert(std::is_same_v<decltype(q), std::queue<T>>);149 }150 {151 std::queue q(a.begin(), a.end(), Alloc());152 static_assert(std::is_same_v<decltype(q), std::queue<T, std::deque<T, Alloc>>>);153 }154 }155 156 {157 {158 std::queue c(std::from_range, std::array<int, 0>());159 static_assert(std::is_same_v<decltype(c), std::queue<int>>);160 }161 162 {163 using Alloc = test_allocator<int>;164 std::queue c(std::from_range, std::array<int, 0>(), Alloc());165 static_assert(std::is_same_v<decltype(c), std::queue<int, std::deque<int, Alloc>>>);166 }167 }168#endif169 170 ContainerAdaptorDeductionGuidesSfinaeAway<std::queue, std::queue<int>>();171 172 return 0;173}174