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From: "unlvsur at live dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/105584] libcxx needs using_if_exist attribute
Date: Thu, 12 May 2022 16:53:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105584

--- Comment #1 from cqwrteur <unlvsur at live dot com> ---
[clang] Implement the using_if_exists attribute


https://github.com/llvm/llvm-project/commit/369c64839946d89cf5697550b6feeea=
031b2f270

This shows how the attribute works. Hope GCC could add it.

Also probably need __clang__::__using_if_exists__ too to avoid name collisi=
ons.=