16719cd011
1. for constructors that takes cvref variation of tuple<UTypes...>, there used to be two SFINAE helper _EnableCopyFromOtherTuple, _EnableMoveFromOtherTuple. And the implementations of these two helpers seem to slightly differ from the spec. But now, we need 4 variations. Instead of adding another two, this change refactored it to a single one _EnableCtrFromUTypesTuple, which directly maps to the spec without changing the C++11 behaviour. However, we need the helper __copy_cvref_t to get the type of std::get<i>(cvref tuple<Utypes...>) for different cvref, so I made __copy_cvref_t to be available in C++11. 2. for constructors that takes variations of std::pair, there used to be four helpers _EnableExplicitCopyFromPair, _EnableImplicitCopyFromPair, _EnableImplicitMoveFromPair, _EnableExplicitMoveFromPair. Instead of adding another four, this change refactored into two helper _EnableCtrFromPair and _BothImplicitlyConvertible. This also removes the need to use _nat 3. for const member assignment operator, since the requirement is very simple, I haven't refactored the old code but instead directly adding the new c++23 code. 4. for const swap, I pretty much copy pasted the non-const version to make these overloads look consistent 5. while doing these change, I found two of the old constructors wasn't marked constexpr for C++20 but they should. fixed them and added unit tests Reviewed By: #libc, ldionne Differential Revision: https://reviews.llvm.org/D116621
74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <tuple>
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// template <class... Types> class tuple;
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// void swap(tuple& rhs);
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// UNSUPPORTED: c++03
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#include <tuple>
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#include <cassert>
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#include "test_macros.h"
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#include "MoveOnly.h"
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TEST_CONSTEXPR_CXX20
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bool test()
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{
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{
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typedef std::tuple<> T;
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T t0;
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T t1;
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t0.swap(t1);
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}
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{
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typedef std::tuple<MoveOnly> T;
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T t0(MoveOnly(0));
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T t1(MoveOnly(1));
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t0.swap(t1);
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assert(std::get<0>(t0) == 1);
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assert(std::get<0>(t1) == 0);
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}
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{
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typedef std::tuple<MoveOnly, MoveOnly> T;
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T t0(MoveOnly(0), MoveOnly(1));
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T t1(MoveOnly(2), MoveOnly(3));
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t0.swap(t1);
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assert(std::get<0>(t0) == 2);
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assert(std::get<1>(t0) == 3);
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assert(std::get<0>(t1) == 0);
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assert(std::get<1>(t1) == 1);
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}
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{
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typedef std::tuple<MoveOnly, MoveOnly, MoveOnly> T;
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T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2));
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T t1(MoveOnly(3), MoveOnly(4), MoveOnly(5));
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t0.swap(t1);
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assert(std::get<0>(t0) == 3);
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assert(std::get<1>(t0) == 4);
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assert(std::get<2>(t0) == 5);
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assert(std::get<0>(t1) == 0);
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assert(std::get<1>(t1) == 1);
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assert(std::get<2>(t1) == 2);
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}
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return true;
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}
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int main(int, char**)
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{
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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