168 lines
4.5 KiB
TypeScript
168 lines
4.5 KiB
TypeScript
/**
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* The `Const` type constructor, which wraps its first type argument and ignores its second.
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* That is, `Const<E, A>` is isomorphic to `E` for any `A`.
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*
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* `Const` has some useful instances. For example, the `Applicative` instance allows us to collect results using a `Monoid`
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* while ignoring return values.
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*
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* @since 2.0.0
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*/
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import { Applicative2C } from './Applicative'
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import { Apply2C } from './Apply'
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import { Bifunctor2 } from './Bifunctor'
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import { BooleanAlgebra } from './BooleanAlgebra'
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import { Bounded } from './Bounded'
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import { Contravariant2 } from './Contravariant'
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import { Eq } from './Eq'
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import { Functor2 } from './Functor'
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import { HeytingAlgebra } from './HeytingAlgebra'
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import { Monoid } from './Monoid'
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import { Ord } from './Ord'
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import { Ring } from './Ring'
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import { Semigroup } from './Semigroup'
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import { Semiring } from './Semiring'
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import { Show } from './Show'
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/**
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* @category model
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* @since 2.0.0
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*/
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export declare type Const<E, A> = E & {
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readonly _A: A
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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 declare const make: <E, A = never>(e: E) => Const<E, A>
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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 declare function getShow<E, A>(S: Show<E>): Show<Const<E, A>>
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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 declare const getEq: <E, A>(E: Eq<E>) => Eq<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getOrd: <E, A>(O: Ord<E>) => Ord<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getBounded: <E, A>(B: Bounded<E>) => Bounded<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getSemigroup: <E, A>(S: Semigroup<E>) => Semigroup<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getMonoid: <E, A>(M: Monoid<E>) => Monoid<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getSemiring: <E, A>(S: Semiring<E>) => Semiring<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getRing: <E, A>(S: Ring<E>) => Ring<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getHeytingAlgebra: <E, A>(H: HeytingAlgebra<E>) => HeytingAlgebra<Const<E, A>>
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/**
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* @category instances
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* @since 2.6.0
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*/
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export declare const getBooleanAlgebra: <E, A>(H: BooleanAlgebra<E>) => BooleanAlgebra<Const<E, A>>
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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 declare function getApply<E>(S: Semigroup<E>): Apply2C<URI, E>
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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 declare function getApplicative<E>(M: Monoid<E>): Applicative2C<URI, E>
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/**
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* @since 2.0.0
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*/
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export declare const contramap: <A, B>(f: (b: B) => A) => <E>(fa: Const<E, A>) => Const<E, B>
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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 declare const map: <A, B>(f: (a: A) => B) => <E>(fa: Const<E, A>) => Const<E, B>
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/**
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* Map a pair of functions over the two type arguments of the bifunctor.
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*
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* @category mapping
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* @since 2.6.2
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*/
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export declare const bimap: <E, G, A, B>(f: (e: E) => G, g: (a: A) => B) => (fa: Const<E, A>) => Const<G, B>
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/**
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* Map a function over the first type argument of a bifunctor.
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*
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* @category error handling
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* @since 2.6.2
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*/
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export declare const mapLeft: <E, G>(f: (e: E) => G) => <A>(fa: Const<E, A>) => Const<G, A>
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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 declare const URI = 'Const'
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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 declare type URI = typeof URI
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declare module './HKT' {
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interface URItoKind2<E, A> {
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readonly [URI]: Const<E, A>
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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 declare const Functor: Functor2<URI>
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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 declare const flap: <A>(a: A) => <E, B>(fab: Const<E, (a: A) => B>) => Const<E, B>
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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 declare const Contravariant: Contravariant2<URI>
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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 declare const Bifunctor: Bifunctor2<URI>
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/**
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* This instance is deprecated, use small, specific instances instead.
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* For example if a function needs a `Functor` instance, pass `C.Functor` instead of `C.const_`
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* (where `C` is from `import C from 'fp-ts/Const'`)
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export declare const const_: Functor2<URI> & Contravariant2<URI> & Bifunctor2<URI>
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