clang-format: Format enum struct/class like enum.

Patch by Joe Hermaszewski. Thank you!

llvm-svn: 188794

clang/lib/Format/UnwrappedLineParser.cpp

@@ -918,6 +918,10 @@ void UnwrappedLineParser::parseAccessSpecifier() {
 
 void UnwrappedLineParser::parseEnum() {
   nextToken();
+  // Eat up enum class ...
+  if (FormatTok->Tok.is(tok::kw_class) ||
+      FormatTok->Tok.is(tok::kw_struct))
+      nextToken();
   if (FormatTok->Tok.is(tok::identifier) ||
       FormatTok->Tok.is(tok::kw___attribute) ||
       FormatTok->Tok.is(tok::kw___declspec)) {

clang/unittests/Format/FormatTest.cpp

@@ -1518,6 +1518,40 @@ TEST_F(FormatTest, FormatsEnum) {
   verifyFormat("enum X f() {\n  a();\n  return 42;\n}");
 }
 
+TEST_F(FormatTest, FormatsEnumStruct) {
+  verifyFormat("enum struct {\n"
+               "  Zero,\n"
+               "  One = 1,\n"
+               "  Two = One + 1,\n"
+               "  Three = (One + Two),\n"
+               "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
+               "  Five = (One, Two, Three, Four, 5)\n"
+               "};");
+  verifyFormat("enum struct Enum {};");
+  verifyFormat("enum struct {};");
+  verifyFormat("enum struct X E {\n} d;");
+  verifyFormat("enum struct __attribute__((...)) E {\n} d;");
+  verifyFormat("enum struct __declspec__((...)) E {\n} d;");
+  verifyFormat("enum struct X f() {\n  a();\n  return 42;\n}");
+}
+
+TEST_F(FormatTest, FormatsEnumClass) {
+  verifyFormat("enum class {\n"
+               "  Zero,\n"
+               "  One = 1,\n"
+               "  Two = One + 1,\n"
+               "  Three = (One + Two),\n"
+               "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
+               "  Five = (One, Two, Three, Four, 5)\n"
+               "};");
+  verifyFormat("enum class Enum {};");
+  verifyFormat("enum class {};");
+  verifyFormat("enum class X E {\n} d;");
+  verifyFormat("enum class __attribute__((...)) E {\n} d;");
+  verifyFormat("enum class __declspec__((...)) E {\n} d;");
+  verifyFormat("enum class X f() {\n  a();\n  return 42;\n}");
+}
+
 TEST_F(FormatTest, FormatsBitfields) {
   verifyFormat("struct Bitfields {\n"
                "  unsigned sClass : 8;\n"