[PATCH] D99489: [clang] [PR49736] [C++2b] Correctly reject lambdas with requires clause and no parameter list

[Marek Kurdej via Phabricator via cfe-commits]

curdeius created this revision.
curdeius added reviewers: aaron.ballman, rsmith.
curdeius requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

This fixes http://llvm.org/PR49736 caused by implementing http://wg21.link/P1102 (https://reviews.llvm.org/rG0620e6f4b76a9725dbd82454d58c5a68a7e47074), by correctly allowing requires-clause only:

1. directly after template-parameter-list
2. after lambda-specifiers iff parameter-declaration-clause is present (2nd kind of lambda-declarator)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99489

Files:
  clang/lib/Parse/ParseExprCXX.cpp
  clang/test/Parser/cxx-concepts-requires-clause.cpp
  clang/test/Parser/cxx2a-template-lambdas.cpp
  clang/test/Parser/cxx2b-lambdas.cpp

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