Update libstdc++ hack comment
authorNathan Sidwell <nathan@acm.org>
Wed, 28 Apr 2021 11:03:11 +0000 (04:03 -0700)
committerNathan Sidwell <nathan@acm.org>
Thu, 29 Apr 2021 10:57:10 +0000 (03:57 -0700)
commit0ff41c2ebc9904f881c958f9006bbf2b6bdc5d1e
treecea45fed4db98984c10836fd0122940c1606fe50
parent9569d5ba02697f64dda86591cb202f8a4390f710
Update libstdc++ hack comment

This libstc++ hack isn't ready for removal. Updating the comment to
note what I found. While I have not proven Ville's
__is_throw_swappable patch made this go away, that patch did remove
the use of noexcept(noexcept(swap(....))). I'm not sure when gcc grew
deferred noexcept parsing.

Differential Revision: https://reviews.llvm.org/D101441
clang/lib/Sema/SemaExceptionSpec.cpp