parjs/internal/combinators/map.js

A parser-combinator library for JavaScript.

"use strict";
/**
 * @module parjs/combinators
 */
/** */
Object.defineProperty(exports, "__esModule", { value: true });
const combinator_1 = require("./combinator");
const parser_1 = require("../parser");
function map(projection) {
    return combinator_1.defineCombinator(source => {
        return new class Map extends parser_1.ParjserBase {
            constructor() {
                super(...arguments);
                this.type = "map";
                this.expecting = source.expecting;
            }
            _apply(ps) {
                source.apply(ps);
                if (!ps.isOk) {
                    return;
                }
                ps.value = projection(ps.value, ps.userState);
            }
        }();
    });
}
exports.map = map;
/**
 * Applies the source parser and yields the constant value `result`.
 * @param result The constant value to yield.
 */
function mapConst(result) {
    return map(() => result);
}
exports.mapConst = mapConst;

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