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Просмотр файла: TaskEither.js
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
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}
};
import { getApplicativeMonoid } from './Applicative';
import { ap as ap_, apFirst as apFirst_, apS as apS_, apSecond as apSecond_, getApplySemigroup as getApplySemigroup_ } from './Apply';
import * as chainable from './Chain';
import { compact as compact_, separate as separate_ } from './Compactable';
import * as E from './Either';
import * as ET from './EitherT';
import { filter as filter_, filterMap as filterMap_, partition as partition_, partitionMap as partitionMap_ } from './Filterable';
import { chainOptionK as chainOptionK_, filterOrElse as filterOrElse_, fromEitherK as fromEitherK_, fromOption as fromOption_, fromOptionK as fromOptionK_, fromPredicate as fromPredicate_, tapEither as tapEither_ } from './FromEither';
import { fromIOK as fromIOK_, tapIO as tapIO_ } from './FromIO';
import { fromTaskK as fromTaskK_, tapTask as tapTask_ } from './FromTask';
import { dual, flow, identity, pipe, SK } from './function';
import { as as as_, asUnit as asUnit_, bindTo as bindTo_, flap as flap_, let as let__ } from './Functor';
import * as _ from './internal';
import * as T from './Task';
// -------------------------------------------------------------------------------------
// constructors
// -------------------------------------------------------------------------------------
/**
* @category constructors
* @since 2.0.0
*/
export var left = /*#__PURE__*/ ET.left(T.Pointed);
/**
* @category constructors
* @since 2.0.0
*/
export var right = /*#__PURE__*/ ET.right(T.Pointed);
/**
* @category constructors
* @since 2.0.0
*/
export var rightTask = /*#__PURE__*/ ET.rightF(T.Functor);
/**
* @category constructors
* @since 2.0.0
*/
export var leftTask = /*#__PURE__*/ ET.leftF(T.Functor);
/**
* @category constructors
* @since 2.0.0
*/
export var rightIO = /*#__PURE__*/ flow(T.fromIO, rightTask);
/**
* @category constructors
* @since 2.0.0
*/
export var leftIO = /*#__PURE__*/ flow(T.fromIO, leftTask);
// -------------------------------------------------------------------------------------
// conversions
// -------------------------------------------------------------------------------------
/**
* @category conversions
* @since 2.7.0
*/
export var fromIO = rightIO;
/**
* @category conversions
* @since 2.7.0
*/
export var fromTask = rightTask;
/**
* @category conversions
* @since 2.0.0
*/
export var fromEither = T.of;
/**
* @category conversions
* @since 2.0.0
*/
export var fromIOEither = T.fromIO;
/**
* @category conversions
* @since 2.11.0
*/
export var fromTaskOption = function (onNone) {
return T.map(E.fromOption(onNone));
};
/**
* @category pattern matching
* @since 2.10.0
*/
export var match =
/*#__PURE__*/ ET.match(T.Functor);
/**
* Less strict version of [`match`](#match).
*
* The `W` suffix (short for **W**idening) means that the handler return types will be merged.
*
* @category pattern matching
* @since 2.10.0
*/
export var matchW = match;
/**
* The `E` suffix (short for **E**ffect) means that the handlers return an effect (`Task`).
*
* @category pattern matching
* @since 2.10.0
*/
export var matchE = /*#__PURE__*/ ET.matchE(T.Monad);
/**
* Alias of [`matchE`](#matche).
*
* @category pattern matching
* @since 2.0.0
*/
export var fold = matchE;
/**
* Less strict version of [`matchE`](#matche).
*
* The `W` suffix (short for **W**idening) means that the handler return types will be merged.
*
* @category pattern matching
* @since 2.10.0
*/
export var matchEW = matchE;
/**
* Alias of [`matchEW`](#matchew).
*
* @category pattern matching
* @since 2.10.0
*/
export var foldW = matchEW;
/**
* @category error handling
* @since 2.0.0
*/
export var getOrElse =
/*#__PURE__*/ ET.getOrElse(T.Monad);
/**
* Less strict version of [`getOrElse`](#getorelse).
*
* The `W` suffix (short for **W**idening) means that the handler return type will be merged.
*
* @category error handling
* @since 2.6.0
*/
export var getOrElseW = getOrElse;
/**
* Transforms a `Promise` that may reject to a `Promise` that never rejects and returns an `Either` instead.
*
* See also [`tryCatchK`](#trycatchk).
*
* @example
* import { left, right } from 'fp-ts/Either'
* import { tryCatch } from 'fp-ts/TaskEither'
*
* tryCatch(() => Promise.resolve(1), String)().then(result => {
* assert.deepStrictEqual(result, right(1))
* })
* tryCatch(() => Promise.reject('error'), String)().then(result => {
* assert.deepStrictEqual(result, left('error'))
* })
*
* @category interop
* @since 2.0.0
*/
export var tryCatch = function (f, onRejected) {
return function () { return __awaiter(void 0, void 0, void 0, function () {
var reason_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
return [4 /*yield*/, f().then(_.right)];
case 1: return [2 /*return*/, _a.sent()];
case 2:
reason_1 = _a.sent();
return [2 /*return*/, _.left(onRejected(reason_1))];
case 3: return [2 /*return*/];
}
});
}); };
};
/**
* Converts a function returning a `Promise` to one returning a `TaskEither`.
*
* @category interop
* @since 2.5.0
*/
export var tryCatchK = function (f, onRejected) {
return function () {
var a = [];
for (var _i = 0; _i < arguments.length; _i++) {
a[_i] = arguments[_i];
}
return tryCatch(function () { return f.apply(void 0, a); }, onRejected);
};
};
/**
* @category conversions
* @since 2.10.0
*/
export var toUnion = /*#__PURE__*/ ET.toUnion(T.Functor);
/**
* @category conversions
* @since 2.12.0
*/
export var fromNullable = /*#__PURE__*/ ET.fromNullable(T.Pointed);
/**
* Use `liftNullable`.
*
* @category legacy
* @since 2.12.0
*/
export var fromNullableK = /*#__PURE__*/ ET.fromNullableK(T.Pointed);
/**
* Use `flatMapNullable`.
*
* @category legacy
* @since 2.12.0
*/
export var chainNullableK =
/*#__PURE__*/ ET.chainNullableK(T.Monad);
// -------------------------------------------------------------------------------------
// combinators
// -------------------------------------------------------------------------------------
/**
* Returns `ma` if is a `Right` or the value returned by `onLeft` otherwise.
*
* See also [alt](#alt).
*
* @example
* import * as E from 'fp-ts/Either'
* import { pipe } from 'fp-ts/function'
* import * as TE from 'fp-ts/TaskEither'
*
* async function test() {
* const errorHandler = TE.orElse((error: string) => TE.right(`recovering from ${error}...`))
* assert.deepStrictEqual(await pipe(TE.right('ok'), errorHandler)(), E.right('ok'))
* assert.deepStrictEqual(await pipe(TE.left('ko'), errorHandler)(), E.right('recovering from ko...'))
* }
*
* test()
*
* @category error handling
* @since 2.0.0
*/
export var orElse =
/*#__PURE__*/ ET.orElse(T.Monad);
/**
* Less strict version of [`orElse`](#orelse).
*
* The `W` suffix (short for **W**idening) means that the return types will be merged.
*
* @category error handling
* @since 2.10.0
*/
export var orElseW = orElse;
/**
* Returns an effect that effectfully "peeks" at the failure of this effect.
*
* @category error handling
* @since 2.15.0
*/
export var tapError = /*#__PURE__*/ dual(2, ET.tapError(T.Monad));
/**
* @category error handling
* @since 2.12.0
*/
export var orElseFirstIOK = function (onLeft) { return tapError(fromIOK(onLeft)); };
/**
* @category error handling
* @since 2.12.0
*/
export var orElseFirstTaskK = function (onLeft) { return tapError(fromTaskK(onLeft)); };
/**
* @category error handling
* @since 2.11.0
*/
export var orLeft =
/*#__PURE__*/ ET.orLeft(T.Monad);
/**
* @since 2.0.0
*/
export var swap = /*#__PURE__*/ ET.swap(T.Functor);
/**
* @category lifting
* @since 2.11.0
*/
export var fromTaskOptionK = function (onNone) {
var from = fromTaskOption(onNone);
return function (f) { return flow(f, from); };
};
/**
* Use `flatMapTaskOption`.
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category legacy
* @since 2.12.3
*/
export var chainTaskOptionKW = function (onNone) {
return function (f) {
return function (ma) {
return flatMap(ma, fromTaskOptionK(onNone)(f));
};
};
};
/**
* Use `flatMapTaskOption`.
*
* @category legacy
* @since 2.11.0
*/
export var chainTaskOptionK = chainTaskOptionKW;
/**
* @category lifting
* @since 2.4.0
*/
export var fromIOEitherK = function (f) { return flow(f, fromIOEither); };
var _map = function (fa, f) { return pipe(fa, map(f)); };
var _apPar = function (fab, fa) { return pipe(fab, ap(fa)); };
var _apSeq = function (fab, fa) { return flatMap(fab, function (f) { return pipe(fa, map(f)); }); };
/* istanbul ignore next */
var _alt = function (fa, that) { return pipe(fa, alt(that)); };
/**
* `map` can be used to turn functions `(a: A) => B` into functions `(fa: F<A>) => F<B>` whose argument and return types
* use the type constructor `F` to represent some computational context.
*
* @category mapping
* @since 2.0.0
*/
export var map = /*#__PURE__*/ ET.map(T.Functor);
/**
* Returns a `TaskEither` whose failure and success channels have been mapped by the specified pair of functions, `f` and `g`.
*
* @example
* import * as TaskEither from 'fp-ts/TaskEither'
* import * as Either from 'fp-ts/Either'
*
* const f = (s: string) => new Error(s)
* const g = (n: number) => n * 2
*
* async function test() {
* assert.deepStrictEqual(await TaskEither.mapBoth(TaskEither.right(1), f, g)(), Either.right(2))
* assert.deepStrictEqual(await TaskEither.mapBoth(TaskEither.left('err'), f, g)(), Either.left(new Error('err')))
* }
*
* test()
*
* @category error handling
* @since 2.16.0
*/
export var mapBoth = /*#__PURE__*/ dual(3, ET.mapBoth(T.Functor));
/**
* Alias of `mapBoth`.
*
* @category legacy
* @since 2.0.0
*/
export var bimap = mapBoth;
/**
* Returns a `TaskEither` with its error channel mapped using the specified function.
*
* @example
* import * as TaskEither from 'fp-ts/TaskEither'
* import * as Either from 'fp-ts/Either'
*
* const f = (s: string) => new Error(s)
*
* async function test() {
* assert.deepStrictEqual(await TaskEither.mapError(TaskEither.right(1), f)(), Either.right(1))
* assert.deepStrictEqual(await TaskEither.mapError(TaskEither.left('err'), f)(), Either.left(new Error('err')))
* }
*
* test()
*
* @category error handling
* @since 2.16.0
*/
export var mapError = /*#__PURE__*/ dual(2, ET.mapError(T.Functor));
/**
* Alias of `mapError`.
*
* @category legacy
* @since 2.0.0
*/
export var mapLeft = mapError;
/**
* @since 2.0.0
*/
export var ap =
/*#__PURE__*/ ET.ap(T.ApplyPar);
/**
* Less strict version of [`ap`](#ap).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @since 2.8.0
*/
export var apW = ap;
/**
* @category sequencing
* @since 2.14.0
*/
export var flatMap = /*#__PURE__*/ dual(2, ET.flatMap(T.Monad));
/**
* Less strict version of [`flatten`](#flatten).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category sequencing
* @since 2.11.0
*/
export var flattenW =
/*#__PURE__*/ flatMap(identity);
/**
* @category sequencing
* @since 2.0.0
*/
export var flatten = flattenW;
/**
* Identifies an associative operation on a type constructor. It is similar to `Semigroup`, except that it applies to
* types of kind `* -> *`.
*
* In case of `TaskEither` returns `fa` if is a `Right` or the value returned by `that` otherwise.
*
* See also [orElse](#orelse).
*
* @example
* import * as E from 'fp-ts/Either'
* import { pipe } from 'fp-ts/function'
* import * as TE from 'fp-ts/TaskEither'
*
* async function test() {
* assert.deepStrictEqual(
* await pipe(
* TE.right(1),
* TE.alt(() => TE.right(2))
* )(),
* E.right(1)
* )
* assert.deepStrictEqual(
* await pipe(
* TE.left('a'),
* TE.alt(() => TE.right(2))
* )(),
* E.right(2)
* )
* assert.deepStrictEqual(
* await pipe(
* TE.left('a'),
* TE.alt(() => TE.left('b'))
* )(),
* E.left('b')
* )
* }
*
* test()
*
* @category error handling
* @since 2.0.0
*/
export var alt =
/*#__PURE__*/ ET.alt(T.Monad);
/**
* Less strict version of [`alt`](#alt).
*
* The `W` suffix (short for **W**idening) means that the error and the return types will be merged.
*
* @category error handling
* @since 2.9.0
*/
export var altW = alt;
/**
* @category constructors
* @since 2.0.0
*/
export var of = right;
/**
* @since 2.7.0
*/
export var throwError = left;
/**
* @category type lambdas
* @since 2.0.0
*/
export var URI = 'TaskEither';
/**
* The default [`ApplicativePar`](#applicativepar) instance returns the first error, if you want to
* get all errors you need to provide a way to concatenate them via a `Semigroup`.
*
* @example
* import * as E from 'fp-ts/Either'
* import { pipe } from 'fp-ts/function'
* import * as RA from 'fp-ts/ReadonlyArray'
* import * as S from 'fp-ts/Semigroup'
* import * as string from 'fp-ts/string'
* import * as T from 'fp-ts/Task'
* import * as TE from 'fp-ts/TaskEither'
*
* interface User {
* readonly id: string
* readonly name: string
* }
*
* const remoteDatabase: ReadonlyArray<User> = [
* { id: 'id1', name: 'John' },
* { id: 'id2', name: 'Mary' },
* { id: 'id3', name: 'Joey' }
* ]
*
* const fetchUser = (id: string): TE.TaskEither<string, User> =>
* pipe(
* remoteDatabase,
* RA.findFirst((user) => user.id === id),
* TE.fromOption(() => `${id} not found`)
* )
*
* async function test() {
* assert.deepStrictEqual(
* await pipe(['id4', 'id5'], RA.traverse(TE.ApplicativePar)(fetchUser))(),
* E.left('id4 not found') // <= first error
* )
*
* const Applicative = TE.getApplicativeTaskValidation(
* T.ApplyPar,
* pipe(string.Semigroup, S.intercalate(', '))
* )
*
* assert.deepStrictEqual(
* await pipe(['id4', 'id5'], RA.traverse(Applicative)(fetchUser))(),
* E.left('id4 not found, id5 not found') // <= all errors
* )
* }
*
* test()
*
* @category error handling
* @since 2.7.0
*/
export function getApplicativeTaskValidation(A, S) {
var ap = ap_(A, E.getApplicativeValidation(S));
return {
URI: URI,
_E: undefined,
map: _map,
ap: function (fab, fa) { return pipe(fab, ap(fa)); },
of: of
};
}
/**
* The default [`Alt`](#alt) instance returns the last error, if you want to
* get all errors you need to provide a way to concatenate them via a `Semigroup`.
*
* See [`getAltValidation`](./Either.ts.html#getaltvalidation).
*
* @category error handling
* @since 2.7.0
*/
export function getAltTaskValidation(S) {
var alt = ET.altValidation(T.Monad, S);
return {
URI: URI,
_E: undefined,
map: _map,
alt: function (fa, that) { return pipe(fa, alt(that)); }
};
}
/**
* @category filtering
* @since 2.10.0
*/
export var getCompactable = function (M) {
var C = E.getCompactable(M);
return {
URI: URI,
_E: undefined,
compact: compact_(T.Functor, C),
separate: separate_(T.Functor, C, E.Functor)
};
};
/**
* @category filtering
* @since 2.1.0
*/
export function getFilterable(M) {
var F = E.getFilterable(M);
var C = getCompactable(M);
var filter = filter_(T.Functor, F);
var filterMap = filterMap_(T.Functor, F);
var partition = partition_(T.Functor, F);
var partitionMap = partitionMap_(T.Functor, F);
return {
URI: URI,
_E: undefined,
map: _map,
compact: C.compact,
separate: C.separate,
filter: function (fa, predicate) { return pipe(fa, filter(predicate)); },
filterMap: function (fa, f) { return pipe(fa, filterMap(f)); },
partition: function (fa, predicate) { return pipe(fa, partition(predicate)); },
partitionMap: function (fa, f) { return pipe(fa, partitionMap(f)); }
};
}
/**
* @category instances
* @since 2.7.0
*/
export var Functor = {
URI: URI,
map: _map
};
/**
* Maps the `Right` value of this `TaskEither` to the specified constant value.
*
* @category mapping
* @since 2.16.0
*/
export var as = dual(2, as_(Functor));
/**
* Maps the `Right` value of this `TaskEither` to the void constant value.
*
* @category mapping
* @since 2.16.0
*/
export var asUnit = asUnit_(Functor);
/**
* @category mapping
* @since 2.10.0
*/
export var flap = /*#__PURE__*/ flap_(Functor);
/**
* @category instances
* @since 2.10.0
*/
export var Pointed = {
URI: URI,
of: of
};
/**
* Runs computations in parallel.
*
* @category instances
* @since 2.10.0
*/
export var ApplyPar = {
URI: URI,
map: _map,
ap: _apPar
};
/**
* Combine two effectful actions, keeping only the result of the first.
*
* @since 2.0.0
*/
export var apFirst = /*#__PURE__*/ apFirst_(ApplyPar);
/**
* Less strict version of [`apFirst`](#apfirst).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @since 2.12.0
*/
export var apFirstW = apFirst;
/**
* Combine two effectful actions, keeping only the result of the second.
*
* @since 2.0.0
*/
export var apSecond = /*#__PURE__*/ apSecond_(ApplyPar);
/**
* Less strict version of [`apSecond`](#apsecond).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @since 2.12.0
*/
export var apSecondW = apSecond;
/**
* Runs computations in parallel.
*
* @category instances
* @since 2.7.0
*/
export var ApplicativePar = {
URI: URI,
map: _map,
ap: _apPar,
of: of
};
/**
* Runs computations sequentially.
*
* @category instances
* @since 2.10.0
*/
export var ApplySeq = {
URI: URI,
map: _map,
ap: _apSeq
};
/**
* Runs computations sequentially.
*
* @category instances
* @since 2.7.0
*/
export var ApplicativeSeq = {
URI: URI,
map: _map,
ap: _apSeq,
of: of
};
/**
* @category instances
* @since 2.10.0
*/
export var Chain = {
URI: URI,
map: _map,
ap: _apPar,
chain: flatMap
};
/**
* @category instances
* @since 2.10.0
*/
export var Monad = {
URI: URI,
map: _map,
ap: _apPar,
chain: flatMap,
of: of
};
/**
* @category instances
* @since 2.10.0
*/
export var MonadIO = {
URI: URI,
map: _map,
ap: _apPar,
chain: flatMap,
of: of,
fromIO: fromIO
};
/**
* @category instances
* @since 2.10.0
*/
export var MonadTask = {
URI: URI,
map: _map,
ap: _apPar,
chain: flatMap,
of: of,
fromIO: fromIO,
fromTask: fromTask
};
/**
* @category instances
* @since 2.10.0
*/
export var MonadThrow = {
URI: URI,
map: _map,
ap: _apPar,
chain: flatMap,
of: of,
throwError: throwError
};
/**
* @category instances
* @since 2.10.0
*/
export var FromEither = {
URI: URI,
fromEither: fromEither
};
/**
* @category instances
* @since 2.10.0
*/
export var FromIO = {
URI: URI,
fromIO: fromIO
};
/**
* @category instances
* @since 2.10.0
*/
export var FromTask = {
URI: URI,
fromIO: fromIO,
fromTask: fromTask
};
/**
* Composes computations in sequence, using the return value of one computation to determine the next computation and
* keeping only the result of the first.
*
* @category combinators
* @since 2.15.0
*/
export var tap = /*#__PURE__*/ dual(2, chainable.tap(Chain));
/**
* Composes computations in sequence, using the return value of one computation to determine the next computation and
* keeping only the result of the first.
*
* @example
* import * as E from 'fp-ts/Either'
* import { pipe } from 'fp-ts/function'
* import * as TE from 'fp-ts/TaskEither'
*
* const checkString = (value: string) => pipe(
* TE.of(value),
* TE.tapEither(() => value.length > 0 ? E.right('ok') : E.left('error'))
* )
*
* async function test() {
* assert.deepStrictEqual(await checkString('')(), E.left('error'))
* assert.deepStrictEqual(await checkString('fp-ts')(), E.right('fp-ts'))
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export var tapEither = /*#__PURE__*/ dual(2, tapEither_(FromEither, Chain));
/**
* Composes computations in sequence, using the return value of one computation to determine the next computation and
* keeping only the result of the first.
*
* @example
* import { pipe } from 'fp-ts/function'
* import * as TE from 'fp-ts/TaskEither'
* import * as E from 'fp-ts/Either'
* import * as Console from 'fp-ts/Console'
*
*
* // Will produce `Hello, fp-ts` to the stdout
* const effectA = TE.tapIO(
* TE.of(1),
* (value) => Console.log(`Hello, ${value}`)
* )
*
* // No output to the stdout
* const effectB = pipe(
* TE.left('error'),
* TE.tapIO((value) => Console.log(`Hello, ${value}`))
* )
*
* async function test() {
* assert.deepStrictEqual(await effectA(), E.of(1))
* assert.deepStrictEqual(await effectB(), E.left('error'))
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export var tapIO = /*#__PURE__*/ dual(2, tapIO_(FromIO, Chain));
/**
* Composes computations in sequence, using the return value of one computation to determine the next computation and
* keeping only the result of the first.
*
* @example
* import * as TE from 'fp-ts/TaskEither'
* import * as T from 'fp-ts/Task'
* import * as E from 'fp-ts/Either'
*
*
* const effect = TE.tapIO(
* TE.of(1),
* (value) => T.of(value + 1)
* )
*
* async function test() {
* assert.deepStrictEqual(await effect(), E.of(1))
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export var tapTask = /*#__PURE__*/ dual(2, tapTask_(FromTask, Chain));
/**
* @category instances
* @since 2.7.0
*/
export var Bifunctor = {
URI: URI,
bimap: mapBoth,
mapLeft: mapError
};
/**
* @category instances
* @since 2.7.0
*/
export var Alt = {
URI: URI,
map: _map,
alt: _alt
};
/**
* @category conversions
* @since 2.0.0
*/
export var fromOption =
/*#__PURE__*/ fromOption_(FromEither);
/**
* Use `liftOption`.
*
* @category legacy
* @since 2.10.0
*/
export var fromOptionK =
/*#__PURE__*/ fromOptionK_(FromEither);
/**
* Use `flatMapOption`.
*
* @category legacy
* @since 2.10.0
*/
export var chainOptionK = /*#__PURE__*/ chainOptionK_(FromEither, Chain);
/**
* Use `flatMapOption`.
*
* @category legacy
* @since 2.13.2
*/
export var chainOptionKW = chainOptionK;
/** @internal */
var _FromEither = {
fromEither: FromEither.fromEither
};
/**
* @category lifting
* @since 2.15.0
*/
export var liftNullable = /*#__PURE__*/ _.liftNullable(_FromEither);
/**
* @category lifting
* @since 2.15.0
*/
export var liftOption = /*#__PURE__*/ _.liftOption(_FromEither);
/** @internal */
var _FlatMap = {
flatMap: flatMap
};
/** @internal */
var _FromIO = {
fromIO: FromIO.fromIO
};
/** @internal */
var _FromTask = {
fromTask: fromTask
};
/**
* @category sequencing
* @since 2.15.0
*/
export var flatMapNullable = /*#__PURE__*/ _.flatMapNullable(_FromEither, _FlatMap);
/**
* @category sequencing
* @since 2.15.0
*/
export var flatMapOption = /*#__PURE__*/ _.flatMapOption(_FromEither, _FlatMap);
/**
* @category sequencing
* @since 2.15.0
*/
export var flatMapEither = /*#__PURE__*/ _.flatMapEither(_FromEither, _FlatMap);
/**
* @category sequencing
* @since 2.15.0
*/
export var flatMapIO = /*#__PURE__*/ _.flatMapIO(_FromIO, _FlatMap);
/**
* @category sequencing
* @since 2.16.0
*/
export var flatMapTask = /*#__PURE__*/ _.flatMapTask(_FromTask, _FlatMap);
/**
* @category sequencing
* @since 2.16.0
*/
export var flatMapIOEither = /*#__PURE__*/ dual(2, function (self, f) {
return flatMap(self, fromIOEitherK(f));
});
/**
* @category sequencing
* @since 2.16.0
*/
export var flatMapTaskOption = /*#__PURE__*/ dual(3, function (self, f, onNone) {
return flatMap(self, function (a) { return fromTaskOption(function () { return onNone(a); })(f(a)); });
});
/**
* Alias of `flatMapEither`.
*
* @category legacy
* @since 2.4.0
*/
export var chainEitherK = flatMapEither;
/**
* Alias of `flatMapEither`.
*
* @category legacy
* @since 2.6.1
*/
export var chainEitherKW = flatMapEither;
/**
* Alias of `tapEither`.
*
* @category legacy
* @since 2.12.0
*/
export var chainFirstEitherK = tapEither;
/**
* Alias of `tapEither`.
*
* Less strict version of [`chainFirstEitherK`](#chainfirsteitherk).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category legacy
* @since 2.12.0
*/
export var chainFirstEitherKW = tapEither;
/**
* @category lifting
* @since 2.0.0
*/
export var fromPredicate = /*#__PURE__*/ fromPredicate_(FromEither);
/**
* @category filtering
* @since 2.0.0
*/
export var filterOrElse = /*#__PURE__*/ filterOrElse_(FromEither, Chain);
/**
* Less strict version of [`filterOrElse`](#filterorelse).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category filtering
* @since 2.9.0
*/
export var filterOrElseW = filterOrElse;
/**
* @category lifting
* @since 2.4.0
*/
export var fromEitherK = /*#__PURE__*/ fromEitherK_(FromEither);
/**
* @category lifting
* @since 2.10.0
*/
export var fromIOK = /*#__PURE__*/ fromIOK_(FromIO);
/**
* Alias of `flatMapIO`.
*
* @category legacy
* @since 2.10.0
*/
export var chainIOK = flatMapIO;
/**
* Alias of `tapIO`.
*
* @category legacy
* @since 2.10.0
*/
export var chainFirstIOK = tapIO;
/**
* @category lifting
* @since 2.10.0
*/
export var fromTaskK = /*#__PURE__*/ fromTaskK_(FromTask);
/**
* Alias of `flatMapTask`.
*
* @category legacy
* @since 2.10.0
*/
export var chainTaskK = flatMapTask;
/**
* Alias of `tapTask`.
*
* @category legacy
* @since 2.10.0
*/
export var chainFirstTaskK = tapTask;
/**
* Alias of `flatMapIOEither`.
*
* Less strict version of [`chainIOEitherK`](#chainioeitherk).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category legacy
* @since 2.6.1
*/
export var chainIOEitherKW = flatMapIOEither;
/**
* Alias of `flatMapIOEither`.
*
* @category legacy
* @since 2.4.0
*/
export var chainIOEitherK = flatMapIOEither;
export function taskify(f) {
return function () {
var args = Array.prototype.slice.call(arguments);
return function () {
return new Promise(function (resolve) {
var cbResolver = function (e, r) { return (e != null ? resolve(_.left(e)) : resolve(_.right(r))); };
f.apply(null, args.concat(cbResolver));
});
};
};
}
/**
* Make sure that a resource is cleaned up in the event of an exception (\*). The release action is called regardless of
* whether the body action throws (\*) or returns.
*
* (\*) i.e. returns a `Left`
*
* @since 2.0.0
*/
export var bracket = function (acquire, use, release) { return bracketW(acquire, use, release); };
/**
* Less strict version of [`bracket`](#bracket).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @since 2.12.0
*/
export var bracketW = function (acquire, use, release) {
return flatMap(acquire, function (a) { return T.flatMap(use(a), function (e) { return flatMap(release(a, e), function () { return T.of(e); }); }); });
};
// -------------------------------------------------------------------------------------
// 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);
/**
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category do notation
* @since 2.8.0
*/
export var bindW = bind;
/**
* @category do notation
* @since 2.8.0
*/
export var apS = /*#__PURE__*/ apS_(ApplyPar);
/**
* Less strict version of [`apS`](#aps).
*
* The `W` suffix (short for **W**idening) means that the error types will be merged.
*
* @category do notation
* @since 2.8.0
*/
export var apSW = apS;
/**
* @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 flow(T.traverseReadonlyNonEmptyArrayWithIndex(f), T.map(E.traverseReadonlyNonEmptyArrayWithIndex(SK)));
};
/**
* 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 `ReadonlyArray#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 (ebs) {
return _.isLeft(ebs)
? acc
: f(i + 1, a)().then(function (eb) {
if (_.isLeft(eb)) {
return eb;
}
ebs.right.push(eb.right);
return ebs;
});
});
}, f(0, _.head(as))().then(E.map(_.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 `flatMap`.
*
* @category legacy
* @since 2.6.0
*/
export var chainW = flatMap;
/**
* Alias of `tap`.
*
* @category legacy
* @since 2.0.0
*/
export var chainFirst = tap;
/**
* Alias of `tap`.
*
* @category legacy
* @since 2.8.0
*/
export var chainFirstW = tap;
/**
* Alias of `tapError`.
*
* @category legacy
* @since 2.11.0
*/
export var orElseFirst = tapError;
/**
* Alias of `tapError`.
*
* @category legacy
* @since 2.11.0
*/
export var orElseFirstW = tapError;
// -------------------------------------------------------------------------------------
// deprecated
// -------------------------------------------------------------------------------------
/**
* This instance is deprecated, use small, specific instances instead.
* For example if a function needs a `Functor` instance, pass `TE.Functor` instead of `TE.taskEither`
* (where `TE` is from `import TE from 'fp-ts/TaskEither'`)
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var taskEither = {
URI: URI,
bimap: mapBoth,
mapLeft: mapError,
map: _map,
of: of,
ap: _apPar,
chain: flatMap,
alt: _alt,
fromIO: fromIO,
fromTask: fromTask,
throwError: throwError
};
/**
* This instance is deprecated, use small, specific instances instead.
* For example if a function needs a `Functor` instance, pass `TE.Functor` instead of `TE.taskEitherSeq`
* (where `TE` is from `import TE from 'fp-ts/TaskEither'`)
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var taskEitherSeq = {
URI: URI,
bimap: mapBoth,
mapLeft: mapError,
map: _map,
of: of,
ap: _apSeq,
chain: flatMap,
alt: _alt,
fromIO: fromIO,
fromTask: fromTask,
throwError: throwError
};
/**
* Use [`getApplySemigroup`](./Apply.ts.html#getapplysemigroup) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var getApplySemigroup =
/*#__PURE__*/ getApplySemigroup_(ApplySeq);
/**
* Use [`getApplicativeMonoid`](./Applicative.ts.html#getapplicativemonoid) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var getApplyMonoid =
/*#__PURE__*/ getApplicativeMonoid(ApplicativeSeq);
/**
* Use [`getApplySemigroup`](./Apply.ts.html#getapplysemigroup) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var getSemigroup = function (S) {
return getApplySemigroup_(T.ApplySeq)(E.getSemigroup(S));
};
/**
* Use [`getApplicativeTaskValidation`](#getapplicativetaskvalidation) and [`getAltTaskValidation`](#getalttaskvalidation) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export function getTaskValidation(SE) {
var applicativeTaskValidation = getApplicativeTaskValidation(T.ApplicativePar, SE);
var altTaskValidation = getAltTaskValidation(SE);
return {
URI: URI,
_E: undefined,
map: _map,
ap: applicativeTaskValidation.ap,
of: of,
chain: flatMap,
bimap: mapBoth,
mapLeft: mapError,
alt: altTaskValidation.alt,
fromIO: fromIO,
fromTask: fromTask,
throwError: throwError
};
}
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