cpp11-migrate: Register the transforms automatically using llvm::Registry

With this change each transform now register a factory. The factories are
registered using an llvm::Registry which makes them available globally.

llvm-svn: 187041

1 files changed, 14 insertions, 0 deletions

diff --git a/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp b/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
index b85f54712a7..47c2cd53215 100644
--- a/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
+++ b/clang-tools-extra/cpp11-migrate/UseAuto/UseAuto.cpp
@@ -47,3 +47,17 @@ int UseAutoTransform::apply(FileOverrides &InputStates,
 
   return 0;
 }
+
+struct UseAutoFactory : TransformFactory {
+  Transform *createTransform(const TransformOptions &Opts) LLVM_OVERRIDE {
+    return new UseAutoTransform(Opts);
+  }
+};
+
+// Register the factory using this statically initialized variable.
+static TransformFactoryRegistry::Add<UseAutoFactory>
+X("use-auto", "Use of 'auto' type specifier");
+
+// This anchor is used to force the linker to link in the generated object file
+// and thus register the factory.
+volatile int UseAutoTransformAnchorSource = 0;