Method _parseForStatement

server/src/parser/parser.ts:308–339

(asyncToken?: KeywordToken)

    // for_stmt: [async] 'for' exprlist 'in' testlist suite ['else' suite]
    private _parseForStatement(asyncToken?: KeywordToken): ForNode {
        let forToken = this._getKeywordToken(KeywordType.For);

        let exprListResult = this._parseExpressionList(true);
        let targetExpr = this._makeExpressionOrTuple(exprListResult);
        let seqExpr: ExpressionNode;
        let forSuite: SuiteNode;
        let elseSuite: SuiteNode | undefined;

        if (!this._consumeTokenIfKeyword(KeywordType.In)) {
            seqExpr = this._handleExpressionParseError('Expected "in"');
            forSuite = new SuiteNode(this._peekToken());
        } else {
            seqExpr = this._parseTestListAsExpression('Expected expression after "in"');
            forSuite = this._parseLoopSuite();

            if (this._consumeTokenIfKeyword(KeywordType.Else)) {
                elseSuite = this._parseSuite();
            }
        }

        let forNode = new ForNode(forToken, targetExpr, seqExpr, forSuite);
        forNode.elseSuite = elseSuite;
        forNode.extend(elseSuite);

        if (asyncToken) {
            forNode.isAsync = true;
            forNode.extend(asyncToken);
        }

        return forNode;
    }

    // comp_iter: comp_for | comp_if
    private _tryParseListComprehension<T extends ParseNode>(target: T): ListComprehensionNode<T> | undefined {