fp-ts-std/dist/esm/Isomorphism.js

The missing pseudo-standard library for fp-ts.

import { flow } from "fp-ts/function";
const getIsoIso = () => ({
    to: I => ({ get: I.to, reverseGet: I.from }),
    from: I => ({ to: I.get, from: I.reverseGet }),
});
export const toIso = (I) => getIsoIso().to(I);
export const fromIso = (I) => getIsoIso().from(I);
export const reverse = (I) => ({
    to: I.from,
    from: I.to,
});
export const deriveSemigroup = (I) => (S) => ({
    concat: (x, y) => I.to(S.concat(I.from(x), I.from(y))),
});
export const deriveMonoid = (I) => (M) => ({
    empty: I.to(M.empty),
    concat: (x, y) => I.to(M.concat(I.from(x), I.from(y))),
});
export const compose = (F) => (G) => ({
    to: flow(F.to, G.to),
    from: flow(G.from, F.from),
});