cpp11-migrate: Refactor for driver model of operation

Re-commit of r189691 and r189689 now with a proper autoconf fix.

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.

llvm-svn: 189798

1 files changed, 2 insertions, 3 deletions

diff --git a/clang-tools-extra/cpp11-migrate/UseNullptr/UseNullptr.cpp b/clang-tools-extra/cpp11-migrate/UseNullptr/UseNullptr.cpp
index afeec4a10af..e07ee6682ee 100644
--- a/clang-tools-extra/cpp11-migrate/UseNullptr/UseNullptr.cpp
+++ b/clang-tools-extra/cpp11-migrate/UseNullptr/UseNullptr.cpp
@@ -24,7 +24,7 @@ using clang::ast_matchers::MatchFinder;
 using namespace clang::tooling;
 using namespace clang;
 
-int UseNullptrTransform::apply(FileOverrides &InputStates,
+int UseNullptrTransform::apply(const FileOverrides &InputStates,
                                const CompilationDatabase &Database,
                                const std::vector<std::string> &SourcePaths) {
   ClangTool UseNullptrTool(Database, SourcePaths);
@@ -32,8 +32,7 @@ int UseNullptrTransform::apply(FileOverrides &InputStates,
   unsigned AcceptedChanges = 0;
 
   MatchFinder Finder;
-  NullptrFixer Fixer(getReplacements(), AcceptedChanges, Options().MaxRiskLevel,
-                     /*Owner=*/ *this);
+  NullptrFixer Fixer(AcceptedChanges, Options().MaxRiskLevel, /*Owner=*/ *this);
 
   Finder.addMatcher(makeCastSequenceMatcher(), &Fixer);