parjs/internal/parsers/fail.js

A parser-combinator library for JavaScript.

"use strict";
/**
 * @module parjs
 */
/** */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const parser_1 = require("../parser");
const defaults_1 = __importDefault(require("lodash/defaults"));
const defaultFailure = {
    kind: "Hard",
    reason: "The primitive fail parser has been applied."
};
/**
 * Returns a parser that will always fail with the given failure info.
 * @param pFailure How the parser should fail.
 */
function fail(pFailure) {
    let failure = defaults_1.default(pFailure, defaultFailure);
    return new class Fail extends parser_1.ParjserBase {
        constructor() {
            super(...arguments);
            this.type = "fail";
            this.expecting = failure.reason;
        }
        _apply(ps) {
            ps.kind = failure.kind;
            ps.reason = this.expecting;
        }
    }();
}
exports.fail = fail;

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