Method _parseYieldExpression

server/src/parser/parser.ts:1130–1141

()

    // yield_expr: 'yield' [yield_arg]
    // yield_arg: 'from' test | testlist
    private _parseYieldExpression(): YieldExpressionNode | YieldFromExpressionNode {
        let yieldToken = this._getKeywordToken(KeywordType.Yield);

        if (this._consumeTokenIfKeyword(KeywordType.From)) {
            return new YieldFromExpressionNode(yieldToken, this._parseTestExpression());
        }

        let exprListResult = this._parseTestExpressionList();
        let exprList = this._makeExpressionOrTuple(exprListResult);

        return new YieldExpressionNode(yieldToken, exprList);
    }

    private _tryParseYieldExpression(): YieldExpressionNode | YieldFromExpressionNode | undefined {
        if (this._peekKeywordType() !== KeywordType.Yield) {