[clang-rename] Better renaming the typedef decl.

Summary:
when renaming a typedef decl, we used to rename the underlying decl of the
typedef, we should rename the typedef itself.

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68322

llvm-svn: 373440

clang/include/clang/Tooling/Refactoring/RecursiveSymbolVisitor.h

@@ -98,7 +98,17 @@ public:
                  TypeBeginLoc, TypeEndLoc))
         return false;
     }
-    return visit(Loc.getType()->getAsCXXRecordDecl(), TypeBeginLoc, TypeEndLoc);
+    if (const Type *TP = Loc.getTypePtr()) {
+      if (TP->getTypeClass() == clang::Type::Record)
+        return visit(TP->getAsCXXRecordDecl(), TypeBeginLoc, TypeEndLoc);
+    }
+    return true;
+  }
+
+  bool VisitTypedefTypeLoc(TypedefTypeLoc TL) {
+    const SourceLocation TypeEndLoc =
+        Lexer::getLocForEndOfToken(TL.getBeginLoc(), 0, SM, LangOpts);
+    return visit(TL.getTypedefNameDecl(), TL.getBeginLoc(), TypeEndLoc);
   }
 
   bool TraverseNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS) {

clang/test/clang-rename/Typedef.cpp

@@ -0,0 +1,8 @@
+namespace std {
+class basic_string {};
+typedef basic_string string;
+} // namespace std
+
+std::string foo(); //  // CHECK: std::new_string foo();
+
+// RUN: clang-rename -offset=93 -new-name=new_string %s --  | sed 's,//.*,,' | FileCheck %s