init component
This commit is contained in:
Robin COuret
592
node_modules/fp-ts/es6/Task.js
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592
node_modules/fp-ts/es6/Task.js
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/**
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* ```ts
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* interface Task<A> {
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* (): Promise<A>
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* }
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* ```
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*
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* `Task<A>` represents an asynchronous computation that yields a value of type `A` and **never fails**.
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* If you want to represent an asynchronous computation that may fail, please see `TaskEither`.
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*
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* @since 2.0.0
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*/
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import { getApplicativeMonoid } from './Applicative';
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import { apFirst as apFirst_, apS as apS_, apSecond as apSecond_, getApplySemigroup as getApplySemigroup_ } from './Apply';
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import * as chainable from './Chain';
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import { fromIOK as fromIOK_, tapIO as tapIO_ } from './FromIO';
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import { dual, identity, pipe } from './function';
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import { as as as_, asUnit as asUnit_, bindTo as bindTo_, flap as flap_, let as let__ } from './Functor';
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import * as _ from './internal';
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// -------------------------------------------------------------------------------------
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// conversions
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// -------------------------------------------------------------------------------------
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/**
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* @category conversions
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* @since 2.0.0
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*/
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export var fromIO = function (ma) { return function () { return Promise.resolve().then(ma); }; };
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// -------------------------------------------------------------------------------------
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// combinators
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// -------------------------------------------------------------------------------------
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/**
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* Creates a task that will complete after a time delay
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*
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* @example
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* import { sequenceT } from 'fp-ts/Apply'
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* import * as T from 'fp-ts/Task'
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* import { takeRight } from 'fp-ts/Array'
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*
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* async function test() {
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* const log: Array<string> = []
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* const append = (message: string): T.Task<void> =>
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* T.fromIO(() => {
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* log.push(message)
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* })
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* const fa = append('a')
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* const fb = T.delay(20)(append('b'))
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* const fc = T.delay(10)(append('c'))
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* const fd = append('d')
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* await sequenceT(T.ApplyPar)(fa, fb, fc, fd)()
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* assert.deepStrictEqual(takeRight(2)(log), ['c', 'b'])
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* }
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*
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* test()
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*
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* @since 2.0.0
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*/
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export function delay(millis) {
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return function (ma) { return function () {
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return new Promise(function (resolve) {
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setTimeout(function () {
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Promise.resolve().then(ma).then(resolve);
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}, millis);
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});
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}; };
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}
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var _map = function (fa, f) { return pipe(fa, map(f)); };
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var _apPar = function (fab, fa) { return pipe(fab, ap(fa)); };
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var _apSeq = function (fab, fa) { return flatMap(fab, function (f) { return pipe(fa, map(f)); }); };
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/**
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* `map` can be used to turn functions `(a: A) => B` into functions `(fa: F<A>) => F<B>` whose argument and return types
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* use the type constructor `F` to represent some computational context.
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*
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* @category mapping
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* @since 2.0.0
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*/
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export var map = function (f) { return function (fa) { return function () {
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return Promise.resolve().then(fa).then(f);
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}; }; };
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/**
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* @since 2.0.0
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*/
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export var ap = function (fa) { return function (fab) { return function () {
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return Promise.all([Promise.resolve().then(fab), Promise.resolve().then(fa)]).then(function (_a) {
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var f = _a[0], a = _a[1];
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return f(a);
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});
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}; }; };
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/**
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* @category constructors
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* @since 2.0.0
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*/
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export var of = function (a) { return function () { return Promise.resolve(a); }; };
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/**
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* @category sequencing
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* @since 2.14.0
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*/
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export var flatMap = /*#__PURE__*/ dual(2, function (ma, f) {
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return function () {
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return Promise.resolve()
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.then(ma)
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.then(function (a) { return f(a)(); });
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};
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});
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/**
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* @category sequencing
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* @since 2.0.0
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*/
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export var flatten = /*#__PURE__*/ flatMap(identity);
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/**
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* @category type lambdas
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* @since 2.0.0
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*/
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export var URI = 'Task';
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/**
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* Monoid returning the first completed task.
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*
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* Note: uses `Promise.race` internally.
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*
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* @example
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* import * as T from 'fp-ts/Task'
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*
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* async function test() {
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* const S = T.getRaceMonoid<string>()
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* const fa = T.delay(20)(T.of('a'))
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* const fb = T.delay(10)(T.of('b'))
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* assert.deepStrictEqual(await S.concat(fa, fb)(), 'b')
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* }
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*
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* test()
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*
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* @category instances
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* @since 2.0.0
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*/
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export function getRaceMonoid() {
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return {
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concat: function (x, y) { return function () { return Promise.race([Promise.resolve().then(x), Promise.resolve().then(y)]); }; },
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empty: never
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};
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}
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/**
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* @category instances
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* @since 2.7.0
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*/
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export var Functor = {
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URI: URI,
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map: _map
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};
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/**
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* Maps the value to the specified constant value.
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*
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* @category mapping
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* @since 2.16.0
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*/
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export var as = dual(2, as_(Functor));
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/**
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* Maps the value to the void constant value.
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*
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* @category mapping
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* @since 2.16.0
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*/
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export var asUnit = asUnit_(Functor);
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/**
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* @category mapping
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* @since 2.10.0
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*/
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export var flap = /*#__PURE__*/ flap_(Functor);
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/**
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* @category instances
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||||
* @since 2.10.0
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*/
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export var Pointed = {
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URI: URI,
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of: of
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};
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/**
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* Runs computations in parallel.
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*
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* @category instances
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* @since 2.10.0
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*/
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export var ApplyPar = {
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URI: URI,
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map: _map,
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ap: _apPar
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};
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/**
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* Combine two effectful actions, keeping only the result of the first.
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*
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* @since 2.0.0
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*/
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export var apFirst = /*#__PURE__*/ apFirst_(ApplyPar);
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/**
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* Combine two effectful actions, keeping only the result of the second.
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*
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* @since 2.0.0
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*/
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export var apSecond = /*#__PURE__*/ apSecond_(ApplyPar);
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/**
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* Runs computations in parallel.
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*
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* @category instances
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* @since 2.7.0
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*/
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export var ApplicativePar = {
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URI: URI,
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map: _map,
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ap: _apPar,
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of: of
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};
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/**
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* Runs computations sequentially.
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*
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* @category instances
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* @since 2.10.0
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*/
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export var ApplySeq = {
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URI: URI,
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map: _map,
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ap: _apSeq
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};
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/**
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* Runs computations sequentially.
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*
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* @category instances
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* @since 2.7.0
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*/
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export var ApplicativeSeq = {
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URI: URI,
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map: _map,
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ap: _apSeq,
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of: of
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};
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var Chain = {
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URI: URI,
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map: _map,
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ap: _apPar,
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chain: flatMap
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};
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var Monad = {
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URI: URI,
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map: _map,
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of: of,
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ap: _apPar,
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chain: flatMap
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};
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var MonadIO = {
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URI: URI,
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map: _map,
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of: of,
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ap: _apPar,
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chain: flatMap,
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fromIO: fromIO
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};
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/**
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* @category zone of death
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||||
* @since 2.7.0
|
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* @deprecated
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*/
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export var fromTask = identity;
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/**
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* @category instances
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* @since 2.10.0
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*/
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export var MonadTask = {
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URI: URI,
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map: _map,
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of: of,
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ap: _apPar,
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chain: flatMap,
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fromIO: fromIO,
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fromTask: fromTask
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};
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/**
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* @category instances
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||||
* @since 2.10.0
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*/
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export var FromIO = {
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URI: URI,
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fromIO: fromIO
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};
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/** @internal */
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var _FlatMap = {
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flatMap: flatMap
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};
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/** @internal */
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var _FromIO = {
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fromIO: FromIO.fromIO
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};
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/**
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* @category sequencing
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||||
* @since 2.16.0
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*/
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export var flatMapIO = _.flatMapIO(_FromIO, _FlatMap);
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/**
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* Composes computations in sequence, using the return value of one computation to determine the next computation and
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* keeping only the result of the first.
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||||
*
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||||
* @category combinators
|
||||
* @since 2.15.0
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||||
*/
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||||
export var tap = /*#__PURE__*/ dual(2, chainable.tap(Chain));
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/**
|
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* Composes computations in sequence, using the return value of one computation to determine the next computation and
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* keeping only the result of the first.
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*
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* @example
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* import { pipe } from 'fp-ts/function'
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* import * as T from 'fp-ts/Task'
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* import * as Console from 'fp-ts/Console'
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*
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||||
* // Will produce `Hello, fp-ts` to the stdout
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||||
* const effect = pipe(
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* T.of('fp-ts'),
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* T.tapIO((value) => Console.log(`Hello, ${value}`)),
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* )
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*
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||||
* async function test() {
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||||
* assert.deepStrictEqual(await effect(), 'fp-ts')
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||||
* }
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||||
*
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||||
* test()
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||||
*
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||||
* @category combinators
|
||||
* @since 2.16.0
|
||||
*/
|
||||
export var tapIO = /*#__PURE__*/ dual(2, tapIO_(FromIO, Chain));
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||||
/**
|
||||
* @category lifting
|
||||
* @since 2.4.0
|
||||
*/
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||||
export var fromIOK =
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||||
/*#__PURE__*/ fromIOK_(FromIO);
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||||
/**
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||||
* Alias of `flatMapIO`.
|
||||
*
|
||||
* @category legacy
|
||||
* @since 2.4.0
|
||||
*/
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||||
export var chainIOK = flatMapIO;
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||||
/**
|
||||
* Alias of `tapIO`.
|
||||
*
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||||
* @category legacy
|
||||
* @since 2.10.0
|
||||
*/
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||||
export var chainFirstIOK = tapIO;
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||||
/**
|
||||
* @category instances
|
||||
* @since 2.10.0
|
||||
*/
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||||
export var FromTask = {
|
||||
URI: URI,
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||||
fromIO: fromIO,
|
||||
fromTask: fromTask
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||||
};
|
||||
// -------------------------------------------------------------------------------------
|
||||
// utils
|
||||
// -------------------------------------------------------------------------------------
|
||||
/**
|
||||
* A `Task` that never completes.
|
||||
*
|
||||
* @since 2.0.0
|
||||
*/
|
||||
export var never = function () { return new Promise(function (_) { return undefined; }); };
|
||||
// -------------------------------------------------------------------------------------
|
||||
// do notation
|
||||
// -------------------------------------------------------------------------------------
|
||||
/**
|
||||
* @category do notation
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var Do = /*#__PURE__*/ of(_.emptyRecord);
|
||||
/**
|
||||
* @category do notation
|
||||
* @since 2.8.0
|
||||
*/
|
||||
export var bindTo = /*#__PURE__*/ bindTo_(Functor);
|
||||
var let_ = /*#__PURE__*/ let__(Functor);
|
||||
export {
|
||||
/**
|
||||
* @category do notation
|
||||
* @since 2.13.0
|
||||
*/
|
||||
let_ as let };
|
||||
/**
|
||||
* @category do notation
|
||||
* @since 2.8.0
|
||||
*/
|
||||
export var bind = /*#__PURE__*/ chainable.bind(Chain);
|
||||
/**
|
||||
* @category do notation
|
||||
* @since 2.8.0
|
||||
*/
|
||||
export var apS = /*#__PURE__*/ apS_(ApplyPar);
|
||||
/**
|
||||
* @since 2.11.0
|
||||
*/
|
||||
export var ApT = /*#__PURE__*/ of(_.emptyReadonlyArray);
|
||||
// -------------------------------------------------------------------------------------
|
||||
// array utils
|
||||
// -------------------------------------------------------------------------------------
|
||||
/**
|
||||
* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(ApplicativePar)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.11.0
|
||||
*/
|
||||
export var traverseReadonlyNonEmptyArrayWithIndex = function (f) {
|
||||
return function (as) {
|
||||
return function () {
|
||||
return Promise.all(as.map(function (a, i) { return Promise.resolve().then(function () { return f(i, a)(); }); }));
|
||||
};
|
||||
};
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativePar)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.11.0
|
||||
*/
|
||||
export var traverseReadonlyArrayWithIndex = function (f) {
|
||||
var g = traverseReadonlyNonEmptyArrayWithIndex(f);
|
||||
return function (as) { return (_.isNonEmpty(as) ? g(as) : ApT); };
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(ApplicativeSeq)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.11.0
|
||||
*/
|
||||
export var traverseReadonlyNonEmptyArrayWithIndexSeq = function (f) {
|
||||
return function (as) {
|
||||
return function () {
|
||||
return _.tail(as).reduce(function (acc, a, i) {
|
||||
return acc.then(function (bs) {
|
||||
return Promise.resolve()
|
||||
.then(f(i + 1, a))
|
||||
.then(function (b) {
|
||||
bs.push(b);
|
||||
return bs;
|
||||
});
|
||||
});
|
||||
}, Promise.resolve()
|
||||
.then(f(0, _.head(as)))
|
||||
.then(_.singleton));
|
||||
};
|
||||
};
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativeSeq)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.11.0
|
||||
*/
|
||||
export var traverseReadonlyArrayWithIndexSeq = function (f) {
|
||||
var g = traverseReadonlyNonEmptyArrayWithIndexSeq(f);
|
||||
return function (as) { return (_.isNonEmpty(as) ? g(as) : ApT); };
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var traverseArrayWithIndex = traverseReadonlyArrayWithIndex;
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverse(Applicative)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var traverseArray = function (f) {
|
||||
return traverseReadonlyArrayWithIndex(function (_, a) { return f(a); });
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#sequence(Applicative)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var sequenceArray =
|
||||
/*#__PURE__*/ traverseArray(identity);
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativeSeq)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var traverseSeqArrayWithIndex = traverseReadonlyArrayWithIndexSeq;
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#traverse(ApplicativeSeq)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var traverseSeqArray = function (f) {
|
||||
return traverseReadonlyArrayWithIndexSeq(function (_, a) { return f(a); });
|
||||
};
|
||||
/**
|
||||
* Equivalent to `ReadonlyArray#sequence(ApplicativeSeq)`.
|
||||
*
|
||||
* @category traversing
|
||||
* @since 2.9.0
|
||||
*/
|
||||
export var sequenceSeqArray =
|
||||
/*#__PURE__*/ traverseSeqArray(identity);
|
||||
// -------------------------------------------------------------------------------------
|
||||
// legacy
|
||||
// -------------------------------------------------------------------------------------
|
||||
/**
|
||||
* Alias of `flatMap`.
|
||||
*
|
||||
* @category legacy
|
||||
* @since 2.0.0
|
||||
*/
|
||||
export var chain = flatMap;
|
||||
/**
|
||||
* Alias of `tap`.
|
||||
*
|
||||
* @category legacy
|
||||
* @since 2.0.0
|
||||
*/
|
||||
export var chainFirst = tap;
|
||||
// -------------------------------------------------------------------------------------
|
||||
// deprecated
|
||||
// -------------------------------------------------------------------------------------
|
||||
/**
|
||||
* This instance is deprecated, use small, specific instances instead.
|
||||
* For example if a function needs a `Functor` instance, pass `T.Functor` instead of `T.task`
|
||||
* (where `T` is from `import T from 'fp-ts/Task'`)
|
||||
*
|
||||
* @category zone of death
|
||||
* @since 2.0.0
|
||||
* @deprecated
|
||||
*/
|
||||
export var task = {
|
||||
URI: URI,
|
||||
map: _map,
|
||||
of: of,
|
||||
ap: _apPar,
|
||||
chain: flatMap,
|
||||
fromIO: fromIO,
|
||||
fromTask: fromTask
|
||||
};
|
||||
/**
|
||||
* This instance is deprecated, use small, specific instances instead.
|
||||
* For example if a function needs a `Functor` instance, pass `T.Functor` instead of `T.taskSeq`
|
||||
* (where `T` is from `import T from 'fp-ts/Task'`)
|
||||
*
|
||||
* @category zone of death
|
||||
* @since 2.0.0
|
||||
* @deprecated
|
||||
*/
|
||||
export var taskSeq = {
|
||||
URI: URI,
|
||||
map: _map,
|
||||
of: of,
|
||||
ap: _apSeq,
|
||||
chain: flatMap,
|
||||
fromIO: fromIO,
|
||||
fromTask: fromTask
|
||||
};
|
||||
/**
|
||||
* Use [`getApplySemigroup`](./Apply.ts.html#getapplysemigroup) instead.
|
||||
*
|
||||
* @category zone of death
|
||||
* @since 2.0.0
|
||||
* @deprecated
|
||||
*/
|
||||
export var getSemigroup = /*#__PURE__*/ getApplySemigroup_(ApplySeq);
|
||||
/**
|
||||
* Use [`getApplicativeMonoid`](./Applicative.ts.html#getapplicativemonoid) instead.
|
||||
*
|
||||
* Lift a monoid into 'Task', the inner values are concatenated using the provided `Monoid`.
|
||||
*
|
||||
* @category zone of death
|
||||
* @since 2.0.0
|
||||
* @deprecated
|
||||
*/
|
||||
export var getMonoid = /*#__PURE__*/ getApplicativeMonoid(ApplicativeSeq);
|
||||
Reference in New Issue
Block a user