| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // tuple& operator=(const tuple& u); |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <tuple> |
| #include <memory> |
| #include <string> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| struct NonAssignable { |
| NonAssignable& operator=(NonAssignable const&) = delete; |
| NonAssignable& operator=(NonAssignable&&) = delete; |
| }; |
| struct CopyAssignable { |
| CopyAssignable& operator=(CopyAssignable const&) = default; |
| CopyAssignable& operator=(CopyAssignable &&) = delete; |
| }; |
| static_assert(std::is_copy_assignable<CopyAssignable>::value, ""); |
| struct MoveAssignable { |
| MoveAssignable& operator=(MoveAssignable const&) = delete; |
| MoveAssignable& operator=(MoveAssignable&&) = default; |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::tuple<> T; |
| T t0; |
| T t; |
| t = t0; |
| } |
| { |
| typedef std::tuple<int> T; |
| T t0(2); |
| T t; |
| t = t0; |
| assert(std::get<0>(t) == 2); |
| } |
| { |
| typedef std::tuple<int, char> T; |
| T t0(2, 'a'); |
| T t; |
| t = t0; |
| assert(std::get<0>(t) == 2); |
| assert(std::get<1>(t) == 'a'); |
| } |
| { |
| typedef std::tuple<int, char, std::string> T; |
| const T t0(2, 'a', "some text"); |
| T t; |
| t = t0; |
| assert(std::get<0>(t) == 2); |
| assert(std::get<1>(t) == 'a'); |
| assert(std::get<2>(t) == "some text"); |
| } |
| { |
| // test reference assignment. |
| using T = std::tuple<int&, int&&>; |
| int x = 42; |
| int y = 100; |
| int x2 = -1; |
| int y2 = 500; |
| T t(x, std::move(y)); |
| T t2(x2, std::move(y2)); |
| t = t2; |
| assert(std::get<0>(t) == x2); |
| assert(&std::get<0>(t) == &x); |
| assert(std::get<1>(t) == y2); |
| assert(&std::get<1>(t) == &y); |
| } |
| { |
| // test that the implicitly generated copy assignment operator |
| // is properly deleted |
| using T = std::tuple<std::unique_ptr<int>>; |
| static_assert(!std::is_copy_assignable<T>::value, ""); |
| } |
| { |
| using T = std::tuple<int, NonAssignable>; |
| static_assert(!std::is_copy_assignable<T>::value, ""); |
| } |
| { |
| using T = std::tuple<int, CopyAssignable>; |
| static_assert(std::is_copy_assignable<T>::value, ""); |
| } |
| { |
| using T = std::tuple<int, MoveAssignable>; |
| static_assert(!std::is_copy_assignable<T>::value, ""); |
| } |
| |
| return 0; |
| } |