pegisland/dist/src/Peg.js

General PEG-based parser supporting island grammars with lake symbols

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Peg = void 0;
// Copyright (C) 2021- Katsumi Okuda.  All rights reserved.
const lake_1 = require("./lake");
const ParsingExpression_1 = require("./ParsingExpression");
const Printer_1 = require("./Printer");
function ruleToString(rule) {
    if (rule.rhs instanceof ParsingExpression_1.OrderedChoice) {
        return `\n${Array.from(rule.rhs.operands.map(Printer_1.peToString))
            .map((s) => `    ${s}`)
            .join(' /\n')}`;
    }
    return (0, Printer_1.peToString)(rule.rhs);
}
function makeAnnotation(rule) {
    return rule.isWater ? '@water\n' : '';
}
class Peg {
    constructor(rules, toplevelRules) {
        this.rules = rules;
        this.toplevelRules = toplevelRules;
    }
    toString() {
        return Array.from(this.rules)
            .filter(([symbol]) => !(0, lake_1.isLake)(symbol))
            .map(([symbol, rule]) => `${makeAnnotation(rule)}${symbol} <- ${ruleToString(rule)}`)
            .join('\n');
    }
}
exports.Peg = Peg;
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