suppress annoying textual repetition as 'aka'

llvm-svn: 112365

clang/lib/AST/ASTDiagnostic.cpp

@@ -151,10 +151,13 @@ ConvertTypeToDiagnosticString(ASTContext &Context, QualType Ty,
     bool ShouldAKA = false;
     QualType DesugaredTy = Desugar(Context, Ty, ShouldAKA);
     if (ShouldAKA) {
-      S = "'"+S+"' (aka '";
-      S += DesugaredTy.getAsString(Context.PrintingPolicy);
-      S += "')";
-      return S;
+      std::string D = DesugaredTy.getAsString(Context.PrintingPolicy);
+      if (D != S) {
+        S = "'" + S + "' (aka '";
+        S += D;
+        S += "')";
+        return S;
+      }
     }
   }
 

clang/test/SemaObjCXX/message.mm

@@ -38,7 +38,7 @@ I2 *operator+(I2_holder, int);
   return 0;
 }
 + (void)method {
-  [ivar method]; // expected-error{{receiver type 'ivar' (aka 'ivar') is not an Objective-C class}}
+  [ivar method]; // expected-error{{receiver type 'ivar' is not an Objective-C class}}
 }
 @end