llvm-project

c872a641 - [clang] Add diagnostic for friend declaration of closure type member (#191419)

[clang] Add diagnostic for friend declaration of closure type member (#191419) Clang allows friend declarations of closure type members, which is disallowed per CWG 1780 (Issue #26540). Added a new diagnostic when the friend declaration targets a member of a `CXXRecordDecl` that is a lambda. --------- Co-authored-by: Corentin Jabot <corentinjabot@gmail.com>