Adjust printQualifiedName to handle unscoped enums in a way similar to anonymous namespaces.

[saugustine]

Summary

Adjust printQualifiedName to handle unscoped enums in a way similar to anonymous namespaces.

[saugustine]

This is related to this bug report:

https://llvm.org/bugs/show_bug.cgi?id=25423

[saugustine]

Handle unscoped enum with name. Also add test cases.

lib/AST/Decl.cpp

if (const ClassTemplateSpecializationDecl *Spec
 
         if (FT->isVariadic()) {
           if (NumParams > 0)
             OS << ", ";
           OS << "...";
         }
       }
       OS << ')';
+    } else if (const EnumDecl *ED = dyn_cast<EnumDecl>(*I)) {
+      // C++ [dcl.enum]p10: Each enum-name and each unscoped
+      // enumerator is declared in the scope that immediately contains
+      // the enum-specifier. Each scoped enumerator is declared in the
+      // scope of the enumeration.
+      if (ED->isScoped() || ED->getIdentifier())
+        OS << *ED;
+      else
+        continue;
     } else {
       OS << *cast<NamedDecl>(*I);
     }
     OS << "::";
   }
 
   if (getDeclName())
     OS << *this;

unittests/AST/NamedDeclPrinterTest.cpp

 }
 
 TEST(NamedDeclPrinter, TestNamespace2) {
   ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
     "inline namespace Z { namespace { int A; } }",
     "A",
     "A"));
 }
+
+TEST(NamedDeclPrinter, TestUnscopedUnnamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "enum { A };",
+    "A",
+    "A"));
+}
+
+TEST(NamedDeclPrinter, TestNamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "enum X { A };",
+    "A",
+    "X::A"));
+}
+
+TEST(NamedDeclPrinter, TestScopedNamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "enum class X { A };",
+    "A",
+    "X::A"));
+}
+
+TEST(NamedDeclPrinter, TestClassWithUnscopedUnnamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "class X { enum { A }; };",
+    "A",
+    "X::A"));
+}
+
+TEST(NamedDeclPrinter, TestClassWithUnscopedNamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "class X { enum Y { A }; };",
+    "A",
+    "X::Y::A"));
+}
+
+TEST(NamedDeclPrinter, TestClassWithScopedNamedEnum) {
+  ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
+    "class X { enum class Y { A }; };",
+    "A",
+    "X::Y::A"));
+}