[libcxx-commits] [PATCH] D55840: P0722R3: Implement library support for destroying delete

[Eric Fiselier via Phabricator via libcxx-commits]

EricWF updated this revision to Diff 191180.
EricWF marked 4 inline comments as done.
EricWF added a comment.
Herald added a subscriber: christof.

This re-works how we allow using destroying delete as an extension.

First, it turns the extension off by default. Even if Clang would support it.
Second, it adds the `_LIBCPP_ENABLE_DESTROYING_DELETE_EXT` which can be used to enable the declarations of `std::destroying_delete_t` and `std::destroying_delete` in any dialect.

Finally, `__cpp_lib_destroying_delete` is defined only when libc++ provides the library declarations and the compiler supports the language features.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55840/new/

https://reviews.llvm.org/D55840

Files:
  docs/UsingLibcxx.rst
  include/new
  test/libcxx/language.support/support.dynamic/destroying_delete_extension.pass.cpp
  test/std/language.support/support.dynamic/destroying_delete_t.pass.cpp

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