pegisland/dist/src/DepthFirstTraverser.js

General PEG-based parser supporting island grammars with lake symbols

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.DepthFirstTraverser = void 0;
const PostorderExpressionTraverser_1 = require("./PostorderExpressionTraverser");
class DepthFirstTraverser extends PostorderExpressionTraverser_1.PostorderExpressionTraverser {
    constructor(visitor, startExpressions) {
        super(visitor);
        this.startExpressions = startExpressions;
        this.visitedExpressions = new Set();
    }
    traverse() {
        this.startExpressions.forEach((e) => {
            e.accept(this);
        });
    }
    visitNonterminal(pe) {
        if (!this.visitedExpressions.has(pe.rule.rhs)) {
            this.visitedExpressions.add(pe.rule.rhs);
            pe.rule.rhs.accept(this);
        }
        pe.accept(this.visitor);
    }
}
exports.DepthFirstTraverser = DepthFirstTraverser;
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