@typed/io/cjs/decoder/Maybe.js

Runtime IO type system

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.maybe = exports.Maybe = void 0;
const either_1 = require("@typed/either");
const maybe_1 = require("@typed/maybe");
const strings_1 = require("@typed/strings");
const G = require("../guard");
const Decoder_1 = require("./Decoder");
const refinement_1 = require("./refinement");
const _Maybe = Decoder_1.Decoder.fromGuard(G.Maybe, 'Maybe<unknown>');
exports.Maybe = _Maybe;
exports.maybe = (a) => refinement_1.refinement(_Maybe, function* (maybe) {
    if (maybe_1.isNothing(maybe)) {
        return maybe;
    }
    const u = maybe_1.fromJust(maybe);
    const t = yield* Decoder_1.catchDecodeFailure(a.decode(u));
    if (either_1.isRight(t)) {
        return maybe_1.Just.of(either_1.fromRight(t));
    }
    return yield* Decoder_1.decodeFailure(Decoder_1.DecodeError.create(`Maybe<${a.expected}>`, strings_1.toString(u)));
}, `Maybe<${a.expected}>`);
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