clang-format: [JS] Support more ES6 classes.

Before:
  foo = class {
      constructor() {}
  }
  ;

After:
  foo = class {
      constructor() {}
  };

llvm-svn: 257154

clang/lib/Format/UnwrappedLineParser.cpp

@@ -841,6 +841,8 @@ void UnwrappedLineParser::parseStructuralElement() {
       // This does not apply for Java and JavaScript.
       if (Style.Language == FormatStyle::LK_Java ||
           Style.Language == FormatStyle::LK_JavaScript) {
+        if (FormatTok->is(tok::semi))
+          nextToken();
         addUnwrappedLine();
         return;
       }

clang/unittests/Format/FormatTestJS.cpp

@@ -755,6 +755,12 @@ TEST_F(FormatTestJS, ClassDeclarations) {
                "  aaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaa: aaaaaaaaaaaaaaaaaaaa):\n"
                "      aaaaaaaaaaaaaaaaaaaaaa {}\n"
                "}");
+  verifyFormat("foo = class Name {\n"
+               "  constructor() {}\n"
+               "};");
+  verifyFormat("foo = class {\n"
+               "  constructor() {}\n"
+               "};");
 
   // ':' is not a type declaration here.
   verifyFormat("class X {\n"