Teach the FixIt in DiagnoseInvalidRedeclaration how to replace the written

nested name specifiers in addition to the function's identifier when the
correction has a different nested name specifier.

llvm-svn: 158178

clang/lib/Sema/SemaDecl.cpp

@@ -4742,15 +4742,19 @@ static NamedDecl* DiagnoseInvalidRedeclaration(
     }
   }
 
-  if (Correction)
-    SemaRef.Diag(NewFD->getLocation(), DiagMsg)
+  if (Correction) {
+    SourceRange FixItLoc(NewFD->getLocation());
+    CXXScopeSpec &SS = ExtraArgs.D.getCXXScopeSpec();
+    if (Correction.getCorrectionSpecifier() && SS.isValid())
+      FixItLoc.setBegin(SS.getBeginLoc());
+    SemaRef.Diag(NewFD->getLocStart(), DiagMsg)
         << Name << NewDC << Correction.getQuoted(SemaRef.getLangOpts())
         << FixItHint::CreateReplacement(
-            NewFD->getLocation(),
-            Correction.getAsString(SemaRef.getLangOpts()));
-  else
+            FixItLoc, Correction.getAsString(SemaRef.getLangOpts()));
+  } else {
     SemaRef.Diag(NewFD->getLocation(), DiagMsg)
         << Name << NewDC << NewFD->getLocation();
+  }
 
   bool NewFDisConst = false;
   if (CXXMethodDecl *NewMD = dyn_cast<CXXMethodDecl>(NewFD))

clang/test/FixIt/fixit.cpp

@@ -242,3 +242,21 @@ void test() {
 }
 
 } // namespace arrow_suggest
+
+// Make sure fixing namespace-qualified identifiers functions properly with
+// namespace-aware typo correction/
+namespace redecl_typo {
+namespace Foo {
+  void BeEvil(); // expected-note {{'BeEvil' declared here}}
+}
+namespace Bar {
+  namespace Foo {
+    bool isGood(); // expected-note {{'Bar::Foo::isGood' declared here}}
+    void beEvil();
+  }
+}
+bool Foo::isGood() { // expected-error {{out-of-line definition of 'isGood' does not match any declaration in namespace 'redecl_typo::Foo'; did you mean 'Bar::Foo::isGood'?}}
+  return true;
+}
+void Foo::beEvil() {} // expected-error {{out-of-line definition of 'beEvil' does not match any declaration in namespace 'redecl_typo::Foo'; did you mean 'BeEvil'?}}
+}