Display enum member types using qualified names

Author: ahejlsberg

Diff for: src/compiler/checker.ts

@@ -2136,7 +2136,12 @@ namespace ts {
                     else if (type.flags & TypeFlags.Reference) {
                         writeTypeReference(<TypeReference>type, nextFlags);
                     }
-                    else if (type.flags & (TypeFlags.Class | TypeFlags.Interface | TypeFlags.EnumLike | TypeFlags.TypeParameter)) {
+                    else if (type.flags & TypeFlags.EnumLiteral) {
+                        buildSymbolDisplay(getParentOfSymbol(type.symbol), writer, enclosingDeclaration, SymbolFlags.Type, SymbolFormatFlags.None, nextFlags);
+                        writePunctuation(writer, SyntaxKind.DotToken);
+                        appendSymbolNameOnly(type.symbol, writer);
+                    }
+                    else if (type.flags & (TypeFlags.Class | TypeFlags.Interface | TypeFlags.Enum | TypeFlags.TypeParameter)) {
                         // The specified symbol flags need to be reinterpreted as type flags
                         buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, SymbolFlags.Type, SymbolFormatFlags.None, nextFlags);
                     }