| //===----------------------------------------------------------------------===// |
| // |
| // 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++98, c++03, c++11 |
| |
| #include <utility> |
| #include <string> |
| #include <type_traits> |
| #include <complex> |
| #include <memory> |
| |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| typedef std::complex<float> cf; |
| { |
| auto t1 = std::make_pair<int, cf> ( 42, { 1,2 } ); |
| assert ( std::get<int>(t1) == 42 ); |
| assert ( std::get<cf>(t1).real() == 1 ); |
| assert ( std::get<cf>(t1).imag() == 2 ); |
| } |
| |
| { |
| const std::pair<int, const int> p1 { 1, 2 }; |
| const int &i1 = std::get<int>(p1); |
| const int &i2 = std::get<const int>(p1); |
| assert ( i1 == 1 ); |
| assert ( i2 == 2 ); |
| } |
| |
| { |
| typedef std::unique_ptr<int> upint; |
| std::pair<upint, int> t(upint(new int(4)), 42); |
| upint p = std::get<upint>(std::move(t)); // get rvalue |
| assert(*p == 4); |
| assert(std::get<upint>(t) == nullptr); // has been moved from |
| } |
| |
| { |
| typedef std::unique_ptr<int> upint; |
| const std::pair<upint, int> t(upint(new int(4)), 42); |
| static_assert(std::is_same<const upint&&, decltype(std::get<upint>(std::move(t)))>::value, ""); |
| static_assert(noexcept(std::get<upint>(std::move(t))), ""); |
| static_assert(std::is_same<const int&&, decltype(std::get<int>(std::move(t)))>::value, ""); |
| static_assert(noexcept(std::get<int>(std::move(t))), ""); |
| auto&& p = std::get<upint>(std::move(t)); // get const rvalue |
| auto&& i = std::get<int>(std::move(t)); // get const rvalue |
| assert(*p == 4); |
| assert(i == 42); |
| assert(std::get<upint>(t) != nullptr); |
| } |
| |
| { |
| int x = 42; |
| int const y = 43; |
| std::pair<int&, int const&> const p(x, y); |
| static_assert(std::is_same<int&, decltype(std::get<int&>(std::move(p)))>::value, ""); |
| static_assert(noexcept(std::get<int&>(std::move(p))), ""); |
| static_assert(std::is_same<int const&, decltype(std::get<int const&>(std::move(p)))>::value, ""); |
| static_assert(noexcept(std::get<int const&>(std::move(p))), ""); |
| } |
| |
| { |
| int x = 42; |
| int const y = 43; |
| std::pair<int&&, int const&&> const p(std::move(x), std::move(y)); |
| static_assert(std::is_same<int&&, decltype(std::get<int&&>(std::move(p)))>::value, ""); |
| static_assert(noexcept(std::get<int&&>(std::move(p))), ""); |
| static_assert(std::is_same<int const&&, decltype(std::get<int const&&>(std::move(p)))>::value, ""); |
| static_assert(noexcept(std::get<int const&&>(std::move(p))), ""); |
| } |
| |
| { |
| constexpr const std::pair<int, const int> p { 1, 2 }; |
| static_assert(std::get<int>(std::move(p)) == 1, ""); |
| static_assert(std::get<const int>(std::move(p)) == 2, ""); |
| } |
| |
| return 0; |
| } |