Method unrollRecursionContexts

runtime/JavaScript/src/antlr4/Parser.js:448–468

(parentCtx)

    }

    unrollRecursionContexts(parentCtx) {
        this._precedenceStack.pop();
        this._ctx.stop = this._input.LT(-1);
        const retCtx = this._ctx; // save current ctx (return value)
        // unroll so _ctx is as it was before call to recursive method
        const parseListeners = this.getParseListeners();
        if (parseListeners !== null && parseListeners.length > 0) {
            while (this._ctx !== parentCtx) {
                this.triggerExitRuleEvent();
                this._ctx = this._ctx.parentCtx;
            }
        } else {
            this._ctx = parentCtx;
        }
        // hook into tree
        retCtx.parentCtx = parentCtx;
        if (this.buildParseTrees && parentCtx !== null) {
            // add return ctx into invoking rule's tree
            parentCtx.addChild(retCtx);
        }
    }

    getInvokingContext(ruleIndex) {
        let ctx = this._ctx;