@typed/lenses/esm/Lens.js

Strongly-typed functional lenses

import { curry } from '@typed/lambda';
import { set } from '@typed/objects';
export var Lens;
(function (Lens) {
    Lens.create = (get, set) => ({
        get,
        update: curry((f, a) => set(f(get(a)), a)),
    });
    Lens.id = () => Lens.create((a) => a, (_, a) => a);
    Lens.prop = (key) => Lens.create((a) => a[key], (b, a) => set(key, b, a));
})(Lens || (Lens = {}));
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