[PATCH] D61335: [LibTooling] Add support to Transformer for composing rules as an ordered choice.

[Yitzhak Mandelbaum via Phabricator via cfe-commits]

ymandel created this revision.
ymandel added a reviewer: ilya-biryukov.
Herald added a project: clang.

This revision adds a new kind of rewrite rule, `CompositeRewriteRule`, which
composes multiple subrules into a new rule that allows ordered-choice among its
subrules. With this feature, users can write the rules that appear later in the
list of subrules knowing that previous rules' patterns *have not matched*,
freeing them from reasoning about those cases in the current pattern.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61335

Files:
  clang/include/clang/Tooling/Refactoring/Transformer.h
  clang/lib/Tooling/Refactoring/Transformer.cpp
  clang/unittests/Tooling/TransformerTest.cpp

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