@typed/fp/esm/Adapter.js

Data Structures and Resources for fp-ts

/**
 * Adapter is based on [@most/adapter](https://github.com/mostjs/adapter), and adds
 * some fp-ts instances.
 * @since 0.9.2
 */
import * as MA from '@most/adapter';
import * as M from '@most/core';
import { flow, pipe } from 'fp-ts/function';
/**
 * @since 0.9.2
 * @category URI
 */
export const URI = '@most/adapter';
/**
 * Apply a stream transformation to an Adapter
 * @since 0.9.2
 * @category Combinator
 */
export const adapt = (f) => ([send, stream]) => [send, M.multicast(f(stream))];
export function create(f) {
    const [send, stream] = MA.createAdapter();
    return [send, f ? f(stream) : stream];
}
/**
 * @since 0.9.2
 * @category Combinator
 */
export function local(f) {
    return ([send, stream]) => [flow(f, send), stream];
}
/**
 * @since 0.9.2
 * @category Combinator
 */
export function map(f) {
    return adapt(M.map(f));
}
/**
 * @since 0.9.2
 * @category Combinator
 */
export const promap = (f, g) => (adapter) => pipe(adapter, local(f), map(g));
export function filter(f) {
    return adapt(M.filter(f));
}
/**
 * @since 0.9.2
 * @category Instance
 */
export const Functor = {
    map,
};
/**
 * @since 0.9.2
 * @category Instance
 */
export const Profunctor = {
    ...Functor,
    promap,
};
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