[PATCH] D20382: Add postorder support to RecursiveASTVisitor

[Raphael Isemann via cfe-commits]

teemperor created this revision.
teemperor added reviewers: zaks.anna, v.g.vassilev, doug.gregor, chandlerc.
teemperor added a subscriber: cfe-commits.

This patch adds postorder traversal support to the RecursiveASTVisitor.

This feature needs to be explicitly enabled by overriding shouldTraversePostOrder()
as it has performance drawbacks for the iterative Stmt-traversal.

http://reviews.llvm.org/D20382

Files:
  include/clang/AST/RecursiveASTVisitor.h
  unittests/AST/CMakeLists.txt
  unittests/AST/PostOrderASTVisitor.cpp

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