pegisland/dist/src/set/TopDownSetCalculator.js

General PEG-based parser supporting island grammars with lake symbols

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TopDownSetCalculator = void 0;
const utils_1 = require("../utils");
const SetCalculator_1 = require("./SetCalculator");
const set_operations_1 = require("../set-operations");
class TopDownSetCalculator extends SetCalculator_1.SetCalculator {
    constructor(rules, beginning) {
        super(rules, false);
        this.beginning = beginning;
    }
    getBeginning(pe) {
        return (0, utils_1.getValue)(this.beginning, pe);
    }
    visitNonterminal(pe) {
        this.set(pe.rule.rhs, (0, set_operations_1.union)(this.get(pe.rule.rhs), this.get(pe)));
    }
    visitTerminal(_pe) {
        // do nothing
    }
    propagateToOperand(pe) {
        this.propagate(pe, pe.operand);
    }
}
exports.TopDownSetCalculator = TopDownSetCalculator;
//# sourceMappingURL=TopDownSetCalculator.js.map