cpp11-migrate: Refactor for driver model of operation

Massive simplification of how replacements and file overrides are handled by
the migrator:
* Sources and headers are all treated the same.
* All replacements for a given translation unit are stored in the same
  TranslationUnitReplacements structure.
* Change tracking is updated only from main file; no need for
  propagating "is tracking" flag around.
* Transform base class no longer responsible for applying replacements.
  They are simply stored and main() looks after deduplication and
  application.
* Renamed -yaml-only to -serialize-replacements. Same restrictions apply:
  Can only request one transform. New restriction: formatting cannot also
  be turned on since it's basically a transform.
* If -serialize-replacements is requested, changes to files will not be
  applied on disk.
* Changed behaviour of function generating names for serialized
  replacements: Only the main source file goes into the name of the file
  since a file may contain changes for multiple different files.
* Updated HeaderReplacements LIT test for new serialization behaviour.
  * Replaced old test that ensures replacements are not serialized if
    -serialize-replacements is not provided. New version ensures changes
    are made directly to all files in the translation unit.
* Updated unit tests.
  * Due to major simplification of structures in FileOverrides.h, the
    FileOverridesTest is quite a bit simpler now.

Differential Revision: http://llvm-reviews.chandlerc.com/D1545

llvm-svn: 189689

1 files changed, 6 insertions, 5 deletions

diff --git a/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp b/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
index ccf49d88c92..72f5ae077f2 100644
--- a/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
+++ b/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
@@ -20,7 +20,7 @@ using clang::ast_matchers::MatchFinder;
 using namespace clang;
 using namespace clang::tooling;
 
-int UseAutoTransform::apply(FileOverrides &InputStates,
+int UseAutoTransform::apply(const FileOverrides &InputStates,
                             const clang::tooling::CompilationDatabase &Database,
                             const std::vector<std::string> &SourcePaths) {
   ClangTool UseAutoTool(Database, SourcePaths);
@@ -28,10 +28,11 @@ int UseAutoTransform::apply(FileOverrides &InputStates,
   unsigned AcceptedChanges = 0;
 
   MatchFinder Finder;
-  IteratorReplacer ReplaceIterators(getReplacements(), AcceptedChanges,
-                                    Options().MaxRiskLevel, /*Owner=*/ *this);
-  NewReplacer ReplaceNew(getReplacements(), AcceptedChanges,
-                         Options().MaxRiskLevel, /*Owner=*/ *this);
+  ReplacementsVec Replaces;
+  IteratorReplacer ReplaceIterators(AcceptedChanges, Options().MaxRiskLevel,
+                                    /*Owner=*/ *this);
+  NewReplacer ReplaceNew(AcceptedChanges, Options().MaxRiskLevel,
+                         /*Owner=*/ *this);
 
   Finder.addMatcher(makeIteratorDeclMatcher(), &ReplaceIterators);
   Finder.addMatcher(makeDeclWithNewMatcher(), &ReplaceNew);