[PATCH] D104071: [AST] Include the TranslationUnitDecl when traversing with TraversalScope

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
sammccall added reviewers: hokein, chh, srhines.
Herald added subscribers: usaxena95, kadircet, arphaman.
sammccall requested review of this revision.
Herald added projects: clang, clang-tools-extra.
Herald added a subscriber: cfe-commits.

Given `int foo, bar;`, TraverseAST reveals this tree:

  TranslationUnitDecl
   - foo
   - bar

Before this patch, with the TraversalScope set to {foo}, TraverseAST yields:

  foo

After this patch it yields:

  TranslationUnitDecl
  - foo

Also, TraverseDecl(TranslationUnitDecl) now respects the traversal scope.

---

The main effect of this today is that clang-tidy checks that match the
translationUnitDecl(), either in order to traverse it or check
parentage, should work.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104071

Files:
  clang-tools-extra/clangd/DumpAST.cpp
  clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
  clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp
  clang-tools-extra/clangd/unittests/TestTU.cpp
  clang/include/clang/AST/ASTContext.h
  clang/include/clang/AST/RecursiveASTVisitor.h
  clang/unittests/Tooling/RecursiveASTVisitorTests/TraversalScope.cpp

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