[PATCH] D40259: [libcxx] LWG2993: reference_wrapper<T> conversion from T&&

[Agustín Bergé via Phabricator via cfe-commits]

K-ballo created this revision.

Implement LWG2993, `reference_wrapper<T>` conversion from `T&&`.

The conversion fail test currently fails to fail (passes), due to https://bugs.llvm.org/show_bug.cgi?id=35332. Flagging it `XFAIL` does not seem to have any effect.


https://reviews.llvm.org/D40259

Files:
  include/__functional_base
  test/std/utilities/function.objects/refwrap/refwrap.assign/copy_assign.pass.cpp
  test/std/utilities/function.objects/refwrap/refwrap.const/type_conv_ctor.fail.cpp
  test/std/utilities/function.objects/refwrap/refwrap.const/type_conv_ctor.pass.cpp

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