parjs/internal/combinators/recover.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");
/**
 * Reduces Hard failures to Soft ones and behaves in the same way on success.
 */
function recover(recoverFunction) {
    return combinator_1.defineCombinator(source => {
        return new class Soft extends parser_1.ParjserBase {
            constructor() {
                super(...arguments);
                this.type = "recover";
                this.expecting = source.expecting;
            }
            _apply(ps) {
                source.apply(ps);
                if (ps.isOk || ps.isFatal)
                    return;
                let result = recoverFunction({
                    userState: ps.userState,
                    kind: ps.kind,
                    reason: ps.reason
                });
                if (!result)
                    return;
                ps.kind = result.kind || ps.kind;
                if (result.kind === "OK") {
                    ps.value = result.value;
                }
                else {
                    ps.reason = result.reason || ps.reason;
                }
            }
        }();
    });
}
exports.recover = recover;

//# sourceMappingURL=recover.js.map