parseUnit(class)
  skipErrorTokens(class)
  listener: beginCompilationUnit(class)
  syntheticPreviousToken(class)
  parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
    parseMetadataStar()
      listener: beginMetadataStar(class)
      listener: endMetadataStar(0)
    parseTopLevelKeywordDeclaration(, class, Instance of 'DirectiveContext')
      parseClassDeclarationModifiers(, class)
      parseClassOrNamedMixinApplication(null, class)
        listener: beginClassOrNamedMixinApplicationPrelude(class)
        ensureIdentifier(class, classOrMixinDeclaration)
          listener: handleIdentifier(Foo, classOrMixinDeclaration)
        listener: handleNoTypeVariables({)
        listener: beginClassDeclaration(class, null, Foo)
        parseClass(Foo, class, class, Foo)
          parseClassHeaderOpt(Foo, class, class)
            parseClassExtendsOpt(Foo)
              listener: handleNoType(Foo)
              listener: handleClassExtends(null, 1)
            parseWithClauseOpt(Foo)
              listener: handleClassNoWithClause()
            parseClassOrMixinImplementsOpt(Foo)
              listener: handleClassOrMixinImplements(null, 0)
            listener: handleClassHeader(class, class, null)
          parseClassOrMixinOrExtensionBody(Foo, DeclarationKind.Class, Foo)
            listener: beginClassOrMixinBody(DeclarationKind.Class, {)
            notEofOrValue(}, bool)
            parseClassOrMixinOrExtensionMemberImpl({, DeclarationKind.Class, Foo)
              parseMetadataStar({)
                listener: beginMetadataStar(bool)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod({, null, null, null, null, null, null, {, Instance of 'SimpleType', null, operator, DeclarationKind.Class, Foo, false)
                listener: beginMethod(null, null, null, null, null, operator)
                listener: handleIdentifier(bool, typeReference)
                listener: handleNoTypeArguments(operator)
                listener: handleType(bool, null)
                parseOperatorName(bool)
                  listener: handleOperatorName(operator, <)
                parseMethodTypeVar(<)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(<, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(<, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                        listener: handleIdentifier(int, typeReference)
                        listener: handleNoTypeArguments(x)
                        listener: handleType(int, null)
                        ensureIdentifier(int, formalParameterDeclaration)
                          listener: handleIdentifier(x, formalParameterDeclaration)
                        listener: handleFormalParameterWithoutValue())
                        listener: endFormalParameter(null, null, x, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, return)
                  parseStatement({)
                    parseStatementX({)
                      parseReturnStatement({)
                        listener: beginReturnStatement(return)
                        parseExpression(return)
                          parsePrecedenceExpression(return, 1, true)
                            parseUnaryExpression(return, true)
                              parsePrimary(return, expression)
                                parseLiteralBool(return)
                                  listener: handleLiteralBool(true)
                        ensureSemicolon(true)
                        listener: endReturnStatement(true, return, ;)
                        inGenerator()
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(1, {, })
                listener: endClassMethod(null, bool, (, null, })
              listener: endMember()
            notEofOrValue(}, int)
            parseClassOrMixinOrExtensionMemberImpl(}, DeclarationKind.Class, Foo)
              parseMetadataStar(})
                listener: beginMetadataStar(int)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod(}, null, null, null, null, null, null, }, Instance of 'SimpleType', null, operator, DeclarationKind.Class, Foo, false)
                listener: beginMethod(null, null, null, null, null, operator)
                listener: handleIdentifier(int, typeReference)
                listener: handleNoTypeArguments(operator)
                listener: handleType(int, null)
                parseOperatorName(int)
                  listener: handleOperatorName(operator, <<)
                parseMethodTypeVar(<<)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(<<, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(<<, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                        listener: handleIdentifier(int, typeReference)
                        listener: handleNoTypeArguments(x)
                        listener: handleType(int, null)
                        ensureIdentifier(int, formalParameterDeclaration)
                          listener: handleIdentifier(x, formalParameterDeclaration)
                        listener: handleFormalParameterWithoutValue())
                        listener: endFormalParameter(null, null, x, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, return)
                  parseStatement({)
                    parseStatementX({)
                      parseReturnStatement({)
                        listener: beginReturnStatement(return)
                        parseExpression(return)
                          parsePrecedenceExpression(return, 1, true)
                            parseUnaryExpression(return, true)
                              parsePrimary(return, expression)
                                parseLiteralInt(return)
                                  listener: handleLiteralInt(42)
                        ensureSemicolon(42)
                        listener: endReturnStatement(true, return, ;)
                        inGenerator()
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(1, {, })
                listener: endClassMethod(null, int, (, null, })
              listener: endMember()
            notEofOrValue(}, bool)
            parseClassOrMixinOrExtensionMemberImpl(}, DeclarationKind.Class, Foo)
              parseMetadataStar(})
                listener: beginMetadataStar(bool)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod(}, null, null, null, null, null, null, }, Instance of 'SimpleType', null, operator, DeclarationKind.Class, Foo, false)
                listener: beginMethod(null, null, null, null, null, operator)
                listener: handleIdentifier(bool, typeReference)
                listener: handleNoTypeArguments(operator)
                listener: handleType(bool, null)
                parseOperatorName(bool)
                  listener: handleOperatorName(operator, >)
                parseMethodTypeVar(>)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(>, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(>, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                        listener: handleIdentifier(int, typeReference)
                        listener: handleNoTypeArguments(x)
                        listener: handleType(int, null)
                        ensureIdentifier(int, formalParameterDeclaration)
                          listener: handleIdentifier(x, formalParameterDeclaration)
                        listener: handleFormalParameterWithoutValue())
                        listener: endFormalParameter(null, null, x, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, return)
                  parseStatement({)
                    parseStatementX({)
                      parseReturnStatement({)
                        listener: beginReturnStatement(return)
                        parseExpression(return)
                          parsePrecedenceExpression(return, 1, true)
                            parseUnaryExpression(return, true)
                              parsePrimary(return, expression)
                                parseLiteralBool(return)
                                  listener: handleLiteralBool(true)
                        ensureSemicolon(true)
                        listener: endReturnStatement(true, return, ;)
                        inGenerator()
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(1, {, })
                listener: endClassMethod(null, bool, (, null, })
              listener: endMember()
            notEofOrValue(}, int)
            parseClassOrMixinOrExtensionMemberImpl(}, DeclarationKind.Class, Foo)
              parseMetadataStar(})
                listener: beginMetadataStar(int)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod(}, null, null, null, null, null, null, }, Instance of 'SimpleType', null, operator, DeclarationKind.Class, Foo, false)
                listener: beginMethod(null, null, null, null, null, operator)
                listener: handleIdentifier(int, typeReference)
                listener: handleNoTypeArguments(operator)
                listener: handleType(int, null)
                parseOperatorName(int)
                  listener: handleOperatorName(operator, >>)
                parseMethodTypeVar(>>)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(>>, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(>>, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                        listener: handleIdentifier(int, typeReference)
                        listener: handleNoTypeArguments(x)
                        listener: handleType(int, null)
                        ensureIdentifier(int, formalParameterDeclaration)
                          listener: handleIdentifier(x, formalParameterDeclaration)
                        listener: handleFormalParameterWithoutValue())
                        listener: endFormalParameter(null, null, x, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, return)
                  parseStatement({)
                    parseStatementX({)
                      parseReturnStatement({)
                        listener: beginReturnStatement(return)
                        parseExpression(return)
                          parsePrecedenceExpression(return, 1, true)
                            parseUnaryExpression(return, true)
                              parsePrimary(return, expression)
                                parseLiteralInt(return)
                                  listener: handleLiteralInt(42)
                        ensureSemicolon(42)
                        listener: endReturnStatement(true, return, ;)
                        inGenerator()
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(1, {, })
                listener: endClassMethod(null, int, (, null, })
              listener: endMember()
            notEofOrValue(}, int)
            parseClassOrMixinOrExtensionMemberImpl(}, DeclarationKind.Class, Foo)
              parseMetadataStar(})
                listener: beginMetadataStar(int)
                listener: endMetadataStar(0)
              listener: beginMember()
              parseMethod(}, null, null, null, null, null, null, }, Instance of 'SimpleType', null, operator, DeclarationKind.Class, Foo, false)
                listener: beginMethod(null, null, null, null, null, operator)
                listener: handleIdentifier(int, typeReference)
                listener: handleNoTypeArguments(operator)
                listener: handleType(int, null)
                parseOperatorName(int)
                  listener: handleOperatorName(operator, >>>)
                parseMethodTypeVar(>>>)
                  listener: handleNoTypeVariables(()
                parseGetterOrFormalParameters(>>>, operator, false, MemberKind.NonStaticMethod)
                  parseFormalParameters(>>>, MemberKind.NonStaticMethod)
                    parseFormalParametersRest((, MemberKind.NonStaticMethod)
                      listener: beginFormalParameters((, MemberKind.NonStaticMethod)
                      parseFormalParameter((, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                        parseMetadataStar(()
                          listener: beginMetadataStar(int)
                          listener: endMetadataStar(0)
                        listener: beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                        listener: handleIdentifier(int, typeReference)
                        listener: handleNoTypeArguments(x)
                        listener: handleType(int, null)
                        ensureIdentifier(int, formalParameterDeclaration)
                          listener: handleIdentifier(x, formalParameterDeclaration)
                        listener: handleFormalParameterWithoutValue())
                        listener: endFormalParameter(null, null, x, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
                      listener: endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
                parseInitializersOpt())
                  listener: handleNoInitializers()
                parseAsyncModifierOpt())
                  listener: handleAsyncModifier(null, null)
                  inPlainSync()
                inPlainSync()
                parseFunctionBody(), false, true)
                  listener: beginBlockFunctionBody({)
                  notEofOrValue(}, return)
                  parseStatement({)
                    parseStatementX({)
                      parseReturnStatement({)
                        listener: beginReturnStatement(return)
                        parseExpression(return)
                          parsePrecedenceExpression(return, 1, true)
                            parseUnaryExpression(return, true)
                              parsePrimary(return, expression)
                                parseLiteralInt(return)
                                  listener: handleLiteralInt(42)
                        ensureSemicolon(42)
                        listener: endReturnStatement(true, return, ;)
                        inGenerator()
                  notEofOrValue(}, })
                  listener: endBlockFunctionBody(1, {, })
                listener: endClassMethod(null, int, (, null, })
              listener: endMember()
            notEofOrValue(}, })
            listener: endClassOrMixinBody(DeclarationKind.Class, 5, {, })
          listener: endClassDeclaration(class, })
  listener: endTopLevelDeclaration()
  reportAllErrorTokens(class)
  listener: endCompilationUnit(1, )