[clang] CTAD alias: fix the transformation for the require-clause expr (#90961)

In the clang AST, constraint nodes are deliberately not instantiated
unless they are actively being evaluated. Consequently, occurrences of
template parameters in the require-clause expression have a subtle
"depth" difference compared to normal occurrences in places, such as
function parameters. When transforming the require-clause, we must take
this distinction into account.

The existing implementation overlooks this consideration. This patch is
to rewrite the implementation of the require-clause transformation to
address this issue.

Fixes #90177
3 files changed
tree: 64fc54fbfe13c3a8ae279ddf853b47ecdf905f32
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. offload/
  21. openmp/
  22. polly/
  23. pstl/
  24. runtimes/
  25. third-party/
  26. utils/
  27. .clang-format
  28. .clang-tidy
  29. .git-blame-ignore-revs
  30. .gitattributes
  31. .gitignore
  32. .mailmap
  33. CODE_OF_CONDUCT.md
  34. CONTRIBUTING.md
  35. LICENSE.TXT
  36. pyproject.toml
  37. README.md
  38. SECURITY.md
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