effect-ts-folds/src/util/Traversable.js

Recursion schemes for effect-ts.

import { Covariant as CO } from '@effect/typeclass';
import { Applicative as IdentityApplicative } from '@effect/typeclass/data/Identity';
import { pipe } from 'effect';
import { dual } from 'effect/Function';
const map = (F) => dual(2, (fa, f) => pipe(fa, F.traverse(IdentityApplicative)(f)));
/** Convert a traversable instance to a covariant one. */
export const traverseCovariant = (F) => ({ map: map(F), imap: CO.imap(map(F)) });
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