Method enterRule

runtime/JavaScript/src/antlr4/Parser.js:380–388

* Always called by generated parsers upon entry to a rule. Access field * //_ctx get the current context.

(localctx, state, ruleIndex)

     * {@link //_ctx} get the current context.
     */
    enterRule(localctx, state, ruleIndex) {
        this.state = state;
        this._ctx = localctx;
        this._ctx.start = this._input.LT(1);
        if (this.buildParseTrees) {
            this.addContextToParseTree();
        }
        this.triggerEnterRuleEvent();
    }

    exitRule() {
        this._ctx.stop = this._input.LT(-1);