Method forStatement

src/main/java/org/dynjs/parser/js/Parser.java:1635–1720

()

    }

    public Statement forStatement() {
        Token position = consume(FOR);
        consume(LEFT_PAREN);
        if (la() == VAR) {
            consume(VAR);
            List<VariableDeclaration> varDeclList = variableDeclarationList(true);
            if (la() == IN) {
                if (varDeclList.size() != 1) {
                    throw new SyntaxError(varDeclList.get(1).getPosition(), "only one variable declaration is allowed");
                }
                // for ( var-decl in ... )
                consume(IN);
                Expression rhs = expression();
                consume(RIGHT_PAREN);
                Statement body = statement();

                return factory.forInStatement(position, varDeclList.get(0), rhs, body);
            } else if (la() == OF) {
                if (varDeclList.size() != 1) {
                    throw new SyntaxError(varDeclList.get(1).getPosition(), "only one variable declaration is allowed");
                }
                // for ( var-decl of ... )
                consume(OF);
                Expression rhs = expression();
                consume(RIGHT_PAREN);
                Statement body = statement();

                return factory.forOfStatement(position, varDeclList.get(0), rhs, body);
            } else {
                // for ( var-decl-list ; ... ; ... )
                consume(SEMICOLON);
                Expression middle = null;
                Expression rhs = null;
                if (la() != SEMICOLON) {
                    middle = expression();
                }
                consume(SEMICOLON);
                if (la() != RIGHT_PAREN) {
                    rhs = expression();
                }
                consume(RIGHT_PAREN);
                Statement body = statement();
                return factory.forStatement(position, varDeclList, middle, rhs, body);
            }
        } else {
            Expression initializer = null;
            if (la() == SEMICOLON) {
                // for ( ;... ; ... )
                // no initializer
            } else {
                initializer = expressionNoIn();
            }

            if (la() == IN) {
                consume(IN);
                // for ( expr in expr )
                Expression rhs = expression();
                consume(RIGHT_PAREN);