[PATCH] D64518: [LibTooling] Relax Transformer to allow rewriting macro expansions

[Yitzhak Mandelbaum via Phabricator via cfe-commits]

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

Currently, Transformer rejects any changes to source locations inside macro
expansions. This change relaxes that constraint to allow rewrites when the
entirety of the expansion is replaced, since that can be mapped to replacing the
entirety of the expansion range in the file source.  This change makes
Transformer consistent with the handling of edit ranges in `clang::edit::Commit`
(which is used, for example, for applying `FixItHint`s from diagnostics).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D64518

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

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