[all-commits] [llvm/llvm-project] 14f245: [clang] Add test for CWG399

[Vlad Serebrennikov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 14f245d01a1ee489a13e843e9c77cecf5c7183a9
      https://github.com/llvm/llvm-project/commit/14f245d01a1ee489a13e843e9c77cecf5c7183a9
  Author: Vlad Serebrennikov <serebrennikov.vladislav at gmail.com>
  Date:   2023-05-20 (Sat, 20 May 2023)

  Changed paths:
    M clang/test/CXX/drs/dr2xx.cpp
    M clang/test/CXX/drs/dr3xx.cpp
    M clang/www/cxx_dr_status.html

  Log Message:
  -----------
  [clang] Add test for CWG399

[[https://wg21.link/p1787 | P1787]]: CWG399 is resolved by explicitly appealing to the lookup for the last component of any suitable nested-name-specifier.
Wording: Otherwise, its nested-name-specifier N shall nominate a type. If N has another nested-name-specifier S, Q is looked up as if its lookup context were that nominated by S. ([basic.lookup.qual]/6.2)

CWG399 revisits a resolution to older CWG244. Our test for CWG244 covers many examples from CWG399, and it was updated in 2020 presumably aware of P1787, so I reused CWG244 test. This approach to reusing was discussed in [[https://reviews.llvm.org/D139095 | a CWG405 patch review]].

Reviewed By: #clang-language-wg, aaron.ballman, shafik

Differential Revision: https://reviews.llvm.org/D147920