| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <stack> |
| // UNSUPPORTED: c++98, c++03, c++11, c++14 |
| // UNSUPPORTED: clang-5, apple-clang-9 |
| // UNSUPPORTED: libcpp-no-deduction-guides |
| // Clang 5 will generate bad implicit deduction guides |
| // Specifically, for the copy constructor. |
| |
| |
| // template<class Container> |
| // stack(Container) -> stack<typename Container::value_type, Container>; |
| // |
| // template<class Container, class Allocator> |
| // stack(Container, Allocator) -> stack<typename Container::value_type, Container>; |
| |
| |
| #include <stack> |
| #include <vector> |
| #include <list> |
| #include <iterator> |
| #include <cassert> |
| #include <cstddef> |
| #include <climits> // INT_MAX |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| #include "test_allocator.h" |
| |
| struct A {}; |
| |
| int main(int, char**) |
| { |
| |
| // Test the explicit deduction guides |
| { |
| std::vector<int> v{0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; |
| std::stack stk(v); |
| |
| static_assert(std::is_same_v<decltype(stk), std::stack<int, std::vector<int>>>, ""); |
| assert(stk.size() == v.size()); |
| assert(stk.top() == v.back()); |
| } |
| |
| { |
| std::list<long, test_allocator<long>> l{10, 11, 12, 13, 14, 15, 16, 17, 18, 19 }; |
| std::stack stk(l, test_allocator<long>(0,2)); // different allocator |
| static_assert(std::is_same_v<decltype(stk)::container_type, std::list<long, test_allocator<long>>>, ""); |
| static_assert(std::is_same_v<decltype(stk)::value_type, long>, ""); |
| assert(stk.size() == 10); |
| assert(stk.top() == 19); |
| // I'd like to assert that we've gotten the right allocator in the stack, 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::stack stk(std::allocator<int>()); // stack (allocator &) |
| } |
| |
| { |
| std::stack<A> source; |
| std::stack stk(source); // stack(stack &) |
| static_assert(std::is_same_v<decltype(stk)::value_type, A>, ""); |
| static_assert(std::is_same_v<decltype(stk)::container_type, std::deque<A>>, ""); |
| assert(stk.size() == 0); |
| } |
| |
| { |
| // This one is odd - you can pass an allocator in to use, but the allocator |
| // has to match the type of the one used by the underlying container |
| typedef short T; |
| typedef test_allocator<T> A; |
| typedef std::deque<T, A> C; |
| |
| C c{0,1,2,3}; |
| std::stack<T, C> source(c); |
| std::stack stk(source, A(2)); // stack(stack &, allocator) |
| static_assert(std::is_same_v<decltype(stk)::value_type, T>, ""); |
| static_assert(std::is_same_v<decltype(stk)::container_type, C>, ""); |
| assert(stk.size() == 4); |
| assert(stk.top() == 3); |
| } |
| |
| |
| return 0; |
| } |