[PATCH] D134128: Resubmit an implemention for constrained template template parameters [P0857R0 Part B]

[Liming Liu via Phabricator via cfe-commits]

lime created this revision.
lime added reviewers: aaron.ballman, h-vetinari, erichkeane, cor3ntin, tahonermann.
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This function had been submitted by @erichkeane long time ago <https://reviews.llvm.org/D110641>. However, he has not been <https://discourse.llvm.org/t/the-constrains-on-template-template-parameters-seem-to-be-ignored/65212/9> working on it. So I submit a new patch with some minor differences.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134128

Files:
  clang/lib/Parse/ParseTemplate.cpp
  clang/test/CXX/temp/temp.arg/temp.arg.template/p3-2a.cpp
  clang/test/SemaTemplate/concepts.cpp
  clang/www/cxx_status.html

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