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Просмотр файла: TaskOption.d.ts
/**
* @since 2.10.0
*/
import { Alt1 } from './Alt'
import { Alternative1 } from './Alternative'
import { Applicative1 } from './Applicative'
import { Apply1 } from './Apply'
import * as chainable from './Chain'
import { Compactable1 } from './Compactable'
import { Either } from './Either'
import { Filterable1 } from './Filterable'
import { FromEither1 } from './FromEither'
import { FromIO1 } from './FromIO'
import { FromTask1 } from './FromTask'
import { LazyArg } from './function'
import { Functor1 } from './Functor'
import { IO } from './IO'
import { Monad1 } from './Monad'
import { MonadIO1 } from './MonadIO'
import { MonadTask1 } from './MonadTask'
import * as O from './Option'
import { Pointed1 } from './Pointed'
import { Predicate } from './Predicate'
import { ReadonlyNonEmptyArray } from './ReadonlyNonEmptyArray'
import { Refinement } from './Refinement'
import { Separated } from './Separated'
import * as T from './Task'
import { TaskEither } from './TaskEither'
import { Zero1 } from './Zero'
import Task = T.Task
import Option = O.Option
/**
* @category model
* @since 2.10.0
*/
export interface TaskOption<A> extends Task<Option<A>> {}
/**
* @category constructors
* @since 2.10.0
*/
export declare const some: <A>(a: A) => TaskOption<A>
/**
* @category lifting
* @since 2.10.0
*/
export declare const fromPredicate: {
<A, B extends A>(refinement: Refinement<A, B>): (a: A) => TaskOption<B>
<A>(predicate: Predicate<A>): <B extends A>(b: B) => TaskOption<B>
<A>(predicate: Predicate<A>): (a: A) => TaskOption<A>
}
/**
* @category conversions
* @since 2.10.0
*/
export declare const fromOption: <A>(fa: Option<A>) => TaskOption<A>
/**
* @category conversions
* @since 2.10.0
*/
export declare const fromEither: <A>(fa: Either<unknown, A>) => TaskOption<A>
/**
* @category conversions
* @since 2.10.0
*/
export declare const fromIO: <A>(fa: IO<A>) => TaskOption<A>
/**
* @category conversions
* @since 2.10.0
*/
export declare const fromTask: <A>(fa: Task<A>) => TaskOption<A>
/**
* @category conversions
* @since 2.11.0
*/
export declare const fromTaskEither: <A>(fa: TaskEither<unknown, A>) => TaskOption<A>
/**
* @category pattern matching
* @since 2.10.0
*/
export declare const match: <B, A>(onNone: () => B, onSome: (a: A) => B) => (ma: TaskOption<A>) => Task<B>
/**
* 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 declare const matchW: <B, A, C>(onNone: () => B, onSome: (a: A) => C) => (ma: TaskOption<A>) => Task<B | C>
/**
* The `E` suffix (short for **E**ffect) means that the handlers return an effect (`Task`).
*
* @category pattern matching
* @since 2.10.0
*/
export declare const matchE: <B, A>(onNone: () => Task<B>, onSome: (a: A) => Task<B>) => (ma: TaskOption<A>) => Task<B>
/**
* Alias of [`matchE`](#matche).
*
* @category pattern matching
* @since 2.10.0
*/
export declare const fold: <B, A>(onNone: () => Task<B>, onSome: (a: A) => Task<B>) => (ma: TaskOption<A>) => Task<B>
/**
* 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 declare const matchEW: <B, C, A>(
onNone: () => Task<B>,
onSome: (a: A) => Task<C>
) => (ma: TaskOption<A>) => Task<B | C>
/**
* Alias of [`matchEW`](#matchew).
*
* @category pattern matching
* @since 2.10.0
*/
export declare const foldW: <B, C, A>(
onNone: () => Task<B>,
onSome: (a: A) => Task<C>
) => (ma: TaskOption<A>) => Task<B | C>
/**
* @category error handling
* @since 2.10.0
*/
export declare const getOrElse: <A>(onNone: LazyArg<Task<A>>) => (fa: TaskOption<A>) => Task<A>
/**
* 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 2.10.0
*/
export declare const getOrElseW: <B>(onNone: LazyArg<Task<B>>) => <A>(ma: TaskOption<A>) => Task<A | B>
/**
* @category conversions
* @since 2.10.0
*/
export declare const fromNullable: <A>(a: A) => TaskOption<NonNullable<A>>
/**
* Transforms a `Promise` that may reject to a `Promise` that never rejects and returns an `Option` instead.
*
* See also [`tryCatchK`](#trycatchk).
*
* @category interop
* @since 2.10.0
*/
export declare const tryCatch: <A>(f: LazyArg<Promise<A>>) => TaskOption<A>
/**
* Converts a function returning a `Promise` to one returning a `TaskOption`.
*
* @category interop
* @since 2.10.0
*/
export declare const tryCatchK: <A extends ReadonlyArray<unknown>, B>(
f: (...a: A) => Promise<B>
) => (...a: A) => TaskOption<B>
/**
* @category lifting
* @since 2.10.0
*/
export declare const fromNullableK: <A extends ReadonlyArray<unknown>, B>(
f: (...a: A) => B | null | undefined
) => (...a: A) => TaskOption<NonNullable<B>>
/**
* @category sequencing
* @since 2.10.0
*/
export declare const chainNullableK: <A, B>(
f: (a: A) => B | null | undefined
) => (ma: TaskOption<A>) => TaskOption<NonNullable<B>>
/**
* @category lifting
* @since 2.10.0
*/
export declare const fromOptionK: <A extends ReadonlyArray<unknown>, B>(
f: (...a: A) => Option<B>
) => (...a: A) => TaskOption<B>
/**
* @category sequencing
* @since 2.10.0
*/
export declare const chainOptionK: <A, B>(f: (a: A) => Option<B>) => (ma: TaskOption<A>) => TaskOption<B>
/**
* `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 2.10.0
*/
export declare const map: <A, B>(f: (a: A) => B) => (fa: TaskOption<A>) => TaskOption<B>
/**
* @since 2.10.0
*/
export declare const ap: <A>(fa: TaskOption<A>) => <B>(fab: TaskOption<(a: A) => B>) => TaskOption<B>
/**
* @category constructors
* @since 2.10.0
*/
export declare const of: <A>(a: A) => TaskOption<A>
/**
* @category sequencing
* @since 2.14.0
*/
export declare const flatMap: {
<A, B>(f: (a: A) => TaskOption<B>): (ma: TaskOption<A>) => TaskOption<B>
<A, B>(ma: TaskOption<A>, f: (a: A) => TaskOption<B>): TaskOption<B>
}
/**
* @category sequencing
* @since 2.16.0
*/
export declare const flatMapIO: {
<A, B>(f: (a: A) => IO<B>): (self: TaskOption<A>) => TaskOption<B>
<A, B>(self: TaskOption<A>, f: (a: A) => IO<B>): TaskOption<B>
}
/**
* @category sequencing
* @since 2.16.0
*/
export declare const flatMapTask: {
<A, B>(f: (a: A) => Task<B>): (self: TaskOption<A>) => TaskOption<B>
<A, B>(self: TaskOption<A>, f: (a: A) => Task<B>): TaskOption<B>
}
/**
* @category sequencing
* @since 2.10.0
*/
export declare const flatten: <A>(mma: TaskOption<TaskOption<A>>) => TaskOption<A>
/**
* @category error handling
* @since 2.10.0
*/
export declare const alt: <A>(second: LazyArg<TaskOption<A>>) => (first: TaskOption<A>) => TaskOption<A>
/**
* Less strict version of [`alt`](#alt).
*
* The `W` suffix (short for **W**idening) means that the return types will be merged.
*
* @category error handling
* @since 2.10.0
*/
export declare const altW: <B>(second: LazyArg<TaskOption<B>>) => <A>(first: TaskOption<A>) => TaskOption<A | B>
/**
* @since 2.10.0
*/
export declare const zero: <A>() => TaskOption<A>
/**
* @category constructors
* @since 2.10.0
*/
export declare const none: TaskOption<never>
/**
* @category filtering
* @since 2.10.0
*/
export declare const compact: Compactable1<URI>['compact']
/**
* @category filtering
* @since 2.10.0
*/
export declare const separate: Compactable1<URI>['separate']
/**
* @category filtering
* @since 2.10.0
*/
export declare const filter: {
<A, B extends A>(refinement: Refinement<A, B>): (fb: TaskOption<A>) => TaskOption<B>
<A>(predicate: Predicate<A>): <B extends A>(fb: TaskOption<B>) => TaskOption<B>
<A>(predicate: Predicate<A>): (fa: TaskOption<A>) => TaskOption<A>
}
/**
* @category filtering
* @since 2.10.0
*/
export declare const filterMap: <A, B>(f: (a: A) => Option<B>) => (fga: TaskOption<A>) => TaskOption<B>
/**
* @category filtering
* @since 2.10.0
*/
export declare const partition: {
<A, B extends A>(refinement: Refinement<A, B>): (fb: TaskOption<A>) => Separated<TaskOption<A>, TaskOption<B>>
<A>(predicate: Predicate<A>): <B extends A>(fb: TaskOption<B>) => Separated<TaskOption<B>, TaskOption<B>>
<A>(predicate: Predicate<A>): (fa: TaskOption<A>) => Separated<TaskOption<A>, TaskOption<A>>
}
/**
* @category filtering
* @since 2.10.0
*/
export declare const partitionMap: <A, B, C>(
f: (a: A) => Either<B, C>
) => (fa: TaskOption<A>) => Separated<TaskOption<B>, TaskOption<C>>
/**
* @category type lambdas
* @since 2.10.0
*/
export declare const URI = 'TaskOption'
/**
* @category type lambdas
* @since 2.10.0
*/
export type URI = typeof URI
declare module './HKT' {
interface URItoKind<A> {
readonly [URI]: TaskOption<A>
}
}
/**
* @category instances
* @since 2.10.0
*/
export declare const Functor: Functor1<URI>
/**
* Maps the `Some` value of this `TaskOption` to the specified constant value.
*
* @category mapping
* @since 2.16.0
*/
export declare const as: {
<A>(a: A): <_>(self: TaskOption<_>) => TaskOption<A>
<_, A>(self: TaskOption<_>, a: A): TaskOption<A>
}
/**
* Maps the `Some` value of this `TaskOption` to the void constant value.
*
* @category mapping
* @since 2.16.0
*/
export declare const asUnit: <_>(self: TaskOption<_>) => TaskOption<void>
/**
* @category mapping
* @since 2.10.0
*/
export declare const flap: <A>(
a: A
) => <B>(fab: import('./HKT').Kind<'TaskOption', (a: A) => B>) => import('./HKT').Kind<'TaskOption', B>
/**
* @category instances
* @since 2.10.0
*/
export declare const Pointed: Pointed1<URI>
/**
* Runs computations in parallel.
*
* @category instances
* @since 2.10.0
*/
export declare const ApplyPar: Apply1<URI>
/**
* Combine two effectful actions, keeping only the result of the first.
*
* @since 2.10.0
*/
export declare const apFirst: <B>(
second: TaskOption<B>
) => <A>(first: import('./HKT').Kind<'TaskOption', A>) => import('./HKT').Kind<'TaskOption', A>
/**
* Combine two effectful actions, keeping only the result of the second.
*
* @since 2.10.0
*/
export declare const apSecond: <B>(
second: TaskOption<B>
) => <A>(first: import('./HKT').Kind<'TaskOption', A>) => import('./HKT').Kind<'TaskOption', B>
/**
* Runs computations in parallel.
*
* @category instances
* @since 2.10.0
*/
export declare const ApplicativePar: Applicative1<URI>
/**
* Runs computations sequentially.
*
* @category instances
* @since 2.10.0
*/
export declare const ApplySeq: Apply1<URI>
/**
* Runs computations sequentially.
*
* @category instances
* @since 2.10.0
*/
export declare const ApplicativeSeq: Applicative1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const Chain: chainable.Chain1<URI>
/**
* @category instances
* @since 2.11.0
*/
export declare const FromEither: FromEither1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const FromIO: FromIO1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const FromTask: FromTask1<URI>
/**
* 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 declare const tap: {
<A, _>(self: TaskOption<A>, f: (a: A) => TaskOption<_>): TaskOption<A>
<A, _>(f: (a: A) => TaskOption<_>): (self: TaskOption<A>) => TaskOption<A>
}
/**
* 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 TO from 'fp-ts/TaskOption'
* import * as O from 'fp-ts/Option'
* import * as E from 'fp-ts/Either'
*
* const compute = (value: number) => pipe(
* TO.of(value),
* TO.tapEither((value) => value > 0 ? E.right('ok') : E.left('error')),
* )
*
* async function test() {
* assert.deepStrictEqual(await compute(1)(), O.of(1))
* assert.deepStrictEqual(await compute(-1)(), O.none)
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export declare const tapEither: {
<A, E, _>(f: (a: A) => Either<E, _>): (self: TaskOption<A>) => TaskOption<A>
<A, E, _>(self: TaskOption<A>, f: (a: A) => Either<E, _>): TaskOption<A>
}
/**
* 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 TO from 'fp-ts/TaskOption'
* import * as O from 'fp-ts/Option'
* import * as Console from 'fp-ts/Console'
*
*
* // Will produce `Hello, fp-ts` to the stdout
* const effectA = TO.tapIO(
* TO.of(1),
* (value) => Console.log(`Hello, ${value}`)
* )
*
* // No output to the stdout
* const effectB = pipe(
* TO.none as TO.TaskOption<string>,
* TO.tapIO((value) => Console.log(`Hello, ${value}`))
* )
*
* async function test() {
* assert.deepStrictEqual(await effectA(), O.of(1))
* assert.deepStrictEqual(await effectB(), O.none)
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export declare const tapIO: {
<A, _>(f: (a: A) => IO<_>): (self: TaskOption<A>) => TaskOption<A>
<A, _>(self: TaskOption<A>, f: (a: A) => IO<_>): TaskOption<A>
}
/**
* 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 TO from 'fp-ts/TaskOption'
* import * as O from 'fp-ts/Option'
* import * as T from 'fp-ts/Task'
*
* const effect = TO.tapIO(
* TO.of(1),
* (value) => T.of(value + 1)
* )
*
* async function test() {
* assert.deepStrictEqual(await effect(), O.of(1))
* }
*
* test()
*
* @category combinators
* @since 2.16.0
*/
export declare const tapTask: {
<A, _>(f: (a: A) => Task<_>): (self: TaskOption<A>) => TaskOption<A>
<A, _>(self: TaskOption<A>, f: (a: A) => Task<_>): TaskOption<A>
}
/**
* @category instances
* @since 2.10.0
*/
export declare const Alt: Alt1<URI>
/**
* @category instances
* @since 2.11.0
*/
export declare const Zero: Zero1<URI>
/**
* @category do notation
* @since 2.11.0
*/
export declare const guard: (b: boolean) => import('./HKT').Kind<'TaskOption', void>
/**
* @category instances
* @since 2.10.0
*/
export declare const Alternative: Alternative1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const Monad: Monad1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const MonadIO: MonadIO1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const MonadTask: MonadTask1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const Compactable: Compactable1<URI>
/**
* @category instances
* @since 2.10.0
*/
export declare const Filterable: Filterable1<URI>
/**
* @category lifting
* @since 2.10.0
*/
export declare const fromIOK: <A extends ReadonlyArray<unknown>, B>(f: (...a: A) => IO<B>) => (...a: A) => TaskOption<B>
/**
* Alias of `flatMapIO`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chainIOK: <A, B>(f: (a: A) => IO<B>) => (first: TaskOption<A>) => TaskOption<B>
/**
* Alias of `tapIO`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chainFirstIOK: <A, B>(f: (a: A) => IO<B>) => (first: TaskOption<A>) => TaskOption<A>
/**
* @category lifting
* @since 2.12.0
*/
export declare const fromEitherK: <E, A extends ReadonlyArray<unknown>, B>(
f: (...a: A) => Either<E, B>
) => (...a: A) => TaskOption<B>
/**
* @category sequencing
* @since 2.12.0
*/
export declare const chainEitherK: <E, A, B>(f: (a: A) => Either<E, B>) => (ma: TaskOption<A>) => TaskOption<B>
/**
* Alias of `tapEither`.
*
* @category legacy
* @since 2.12.0
*/
export declare const chainFirstEitherK: <E, A, B>(f: (a: A) => Either<E, B>) => (ma: TaskOption<A>) => TaskOption<A>
/**
* @category lifting
* @since 2.10.0
*/
export declare const fromTaskK: <A extends ReadonlyArray<unknown>, B>(
f: (...a: A) => T.Task<B>
) => (...a: A) => TaskOption<B>
/**
* Alias of `flatMapTask`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chainTaskK: <A, B>(f: (a: A) => T.Task<B>) => (first: TaskOption<A>) => TaskOption<B>
/**
* Alias of `tapTask`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chainFirstTaskK: <A, B>(f: (a: A) => T.Task<B>) => (first: TaskOption<A>) => TaskOption<A>
/**
* @category do notation
* @since 2.10.0
*/
export declare const Do: TaskOption<{}>
/**
* @category do notation
* @since 2.10.0
*/
export declare const bindTo: <N extends string>(
name: N
) => <A>(fa: import('./HKT').Kind<'TaskOption', A>) => import('./HKT').Kind<'TaskOption', { readonly [K in N]: A }>
declare const let_: <N extends string, A, B>(
name: Exclude<N, keyof A>,
f: (a: A) => B
) => (
fa: import('./HKT').Kind<'TaskOption', A>
) => import('./HKT').Kind<'TaskOption', { readonly [K in keyof A | N]: K extends keyof A ? A[K] : B }>
export {
/**
* @category do notation
* @since 2.13.0
*/
let_ as let
}
/**
* @category do notation
* @since 2.10.0
*/
export declare const bind: <N extends string, A, B>(
name: Exclude<N, keyof A>,
f: (a: A) => import('./HKT').Kind<'TaskOption', B>
) => (
ma: import('./HKT').Kind<'TaskOption', A>
) => import('./HKT').Kind<'TaskOption', { readonly [K in keyof A | N]: K extends keyof A ? A[K] : B }>
/**
* @category do notation
* @since 2.10.0
*/
export declare const apS: <N extends string, A, B>(
name: Exclude<N, keyof A>,
fb: TaskOption<B>
) => (
fa: import('./HKT').Kind<'TaskOption', A>
) => import('./HKT').Kind<'TaskOption', { readonly [K in keyof A | N]: K extends keyof A ? A[K] : B }>
/**
* @since 2.11.0
*/
export declare const ApT: TaskOption<readonly []>
/**
* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(ApplicativePar)`.
*
* @category traversing
* @since 2.11.0
*/
export declare const traverseReadonlyNonEmptyArrayWithIndex: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyNonEmptyArray<A>) => TaskOption<ReadonlyNonEmptyArray<B>>
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativePar)`.
*
* @category traversing
* @since 2.11.0
*/
export declare const traverseReadonlyArrayWithIndex: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(ApplicativeSeq)`.
*
* @category traversing
* @since 2.11.0
*/
export declare const traverseReadonlyNonEmptyArrayWithIndexSeq: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyNonEmptyArray<A>) => TaskOption<ReadonlyNonEmptyArray<B>>
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativeSeq)`.
*
* @category traversing
* @since 2.11.0
*/
export declare const traverseReadonlyArrayWithIndexSeq: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const traverseArrayWithIndex: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyArray#traverse(Applicative)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const traverseArray: <A, B>(
f: (a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyArray#sequence(Applicative)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const sequenceArray: <A>(as: ReadonlyArray<TaskOption<A>>) => TaskOption<ReadonlyArray<A>>
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(ApplicativeSeq)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const traverseSeqArrayWithIndex: <A, B>(
f: (index: number, a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyArray#traverse(ApplicativeSeq)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const traverseSeqArray: <A, B>(
f: (a: A) => TaskOption<B>
) => (as: ReadonlyArray<A>) => TaskOption<ReadonlyArray<B>>
/**
* Equivalent to `ReadonlyArray#sequence(ApplicativeSeq)`.
*
* @category traversing
* @since 2.10.0
*/
export declare const sequenceSeqArray: <A>(as: ReadonlyArray<TaskOption<A>>) => TaskOption<ReadonlyArray<A>>
/**
* Alias of `flatMap`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chain: <A, B>(f: (a: A) => TaskOption<B>) => (ma: TaskOption<A>) => TaskOption<B>
/**
* Alias of `tap`.
*
* @category legacy
* @since 2.10.0
*/
export declare const chainFirst: <A, B>(f: (a: A) => TaskOption<B>) => (first: TaskOption<A>) => TaskOption<A>
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