clang-format: accept generic types in enum declaration

[het]

Summary

Before

enum Foo implements Bar<X, Y> {
  ABC {
    ...
  }
  , CDE {
    ...
  };
}

After

enum Foo implements Bar<X, Y> {
  ABC {
    ...
  },
  CDE {
    ...
  };
}

[djasper]

Looks good, I'll submit.

[djasper]

Submitted as r222394. Thank you.

lib/Format/UnwrappedLineParser.cpp

void UnwrappedLineParser::parseAccessSpecifier() {
   if (FormatTok->Tok.is(tok::colon))
     nextToken();
   addUnwrappedLine();
 }
 
 void UnwrappedLineParser::parseEnum() {
   // Won't be 'enum' for NS_ENUMs.
   if (FormatTok->Tok.is(tok::kw_enum))
-    nextToken(); 
+    nextToken();
 
   // Eat up enum class ...
   if (FormatTok->Tok.is(tok::kw_class) || FormatTok->Tok.is(tok::kw_struct))
     nextToken();
   while (FormatTok->Tok.getIdentifierInfo() ||
-         FormatTok->isOneOf(tok::colon, tok::coloncolon)) {
+         FormatTok->isOneOf(tok::colon, tok::coloncolon, tok::less,
+                            tok::greater, tok::comma, tok::question)) {
     nextToken();
     // We can have macros or attributes in between 'enum' and the enum name.
-    if (FormatTok->Tok.is(tok::l_paren))
+    if (FormatTok->is(tok::l_paren))
       parseParens();
-    if (FormatTok->Tok.is(tok::identifier))
+    if (FormatTok->is(tok::identifier))
       nextToken();
   }
 
   // Just a declaration or something is wrong.
-  if (!FormatTok->is(tok::l_brace))
+  if (FormatTok->isNot(tok::l_brace))
     return;
   FormatTok->BlockKind = BK_Block;
 
   if (Style.Language == FormatStyle::LK_Java) {
     // Java enums are different.
     parseJavaEnumBody();
     return;
   }

unittests/Format/FormatTestJava.cpp

verifyFormat("public enum SomeThing {\n"
                "    @Override\n"
                "    public String toString() {\n"
                "      return \"CDE\";\n"
                "    }\n"
                "  };\n"
                "  public void f() {\n"
                "  }\n"
                "}");
+  verifyFormat("private enum SomeEnum implements Foo<?, B> {\n"
+               "  ABC {\n"
+               "    @Override\n"
+               "    public String toString() {\n"
+               "      return \"ABC\";\n"
+               "    }\n"
+               "  },\n"
+               "  CDE {\n"
+               "    @Override\n"
+               "    public String toString() {\n"
+               "      return \"CDE\";\n"
+               "    }\n"
+               "  };\n"
+               "}");
 }
 
 TEST_F(FormatTestJava, ThrowsDeclarations) {
   verifyFormat("public void doSooooooooooooooooooooooooooomething()\n"
                "    throws LooooooooooooooooooooooooooooongException {\n}");
 }
 
 TEST_F(FormatTestJava, Annotations) {