dev_17.0.6

HHui Xie[libc++] P2321R2 section [tuple.tuple]. Adding C++23 constructors, assignment operators and swaps to tuple

16719cd0创建于 2022年6月24日历史提交

文件	最后提交记录	最后更新时间
non_member_swap.pass.cpp	[libc++] Remove the c++98 Lit feature from the test suite C++98 and C++03 are effectively aliases as far as Clang is concerned. As such, allowing both std=c++98 and std=c++03 as Lit parameters is just slightly confusing, but provides no value. It's similar to allowing both std=c++17 and std=c++1z, which we don't do. This was discovered because we had an internal bot that ran the test suite under both c++98 AND c++03 -- one of which is redundant. Differential Revision: https://reviews.llvm.org/D80926	6 年前
non_member_swap_const.pass.cpp	[libc++] P2321R2 section [tuple.tuple]. Adding C++23 constructors, assignment operators and swaps to tuple 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	4 年前