parjs/internal/combinators/many.js

A parser-combinator library for JavaScript.

"use strict";
/**
 * @module parjs/combinators
 */
/** */
Object.defineProperty(exports, "__esModule", { value: true });
const issues_1 = require("../issues");
const result_1 = require("../result");
const combinator_1 = require("./combinator");
const parser_1 = require("../parser");
function many(maxIterations = Infinity) {
    return combinator_1.defineCombinator(source => {
        return new class Many extends parser_1.ParjserBase {
            constructor() {
                super(...arguments);
                this.type = "many";
                this.expecting = source.expecting;
            }
            _apply(ps) {
                let { position } = ps;
                let arr = [];
                let i = 0;
                while (true) {
                    source.apply(ps);
                    if (!ps.isOk)
                        break;
                    if (i >= maxIterations)
                        break;
                    if (maxIterations === Infinity && ps.position === position) {
                        issues_1.Issues.guardAgainstInfiniteLoop("many");
                    }
                    position = ps.position;
                    arr.push(ps.value);
                    i++;
                }
                if (ps.atLeast(result_1.ResultKind.HardFail)) {
                    return;
                }
                ps.value = arr;
                // recover from the last failure.
                ps.position = position;
                ps.kind = result_1.ResultKind.Ok;
            }
        }();
    });
}
exports.many = many;

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