Contravariant overview

Added in v2.0.0

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Table of contents

• model
  • Contravariant (interface)
  • Contravariant1 (interface)
  • Contravariant2 (interface)
  • Contravariant2C (interface)
  • Contravariant3 (interface)
  • Contravariant3C (interface)
  • Contravariant4 (interface)

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model

Contravariant (interface)

Signature

export interface Contravariant<F> {
  readonly URI: F
  readonly contramap: <A, B>(fa: HKT<F, A>, f: (b: B) => A) => HKT<F, B>
}

Added in v2.0.0

Contravariant1 (interface)

Signature

export interface Contravariant1<F extends URIS> {
  readonly URI: F
  readonly contramap: <A, B>(fa: Kind<F, A>, f: (b: B) => A) => Kind<F, B>
}

Added in v2.0.0

Contravariant2 (interface)

Signature

export interface Contravariant2<F extends URIS2> {
  readonly URI: F
  readonly contramap: <E, A, B>(fa: Kind2<F, E, A>, f: (b: B) => A) => Kind2<F, E, B>
}

Added in v2.0.0

Contravariant2C (interface)

Signature

export interface Contravariant2C<F extends URIS2, E> {
  readonly URI: F
  readonly _E: E
  readonly contramap: <A, B>(fa: Kind2<F, E, A>, f: (b: B) => A) => Kind2<F, E, B>
}

Added in v2.0.0

Contravariant3 (interface)

Signature

export interface Contravariant3<F extends URIS3> {
  readonly URI: F
  readonly contramap: <R, E, A, B>(fa: Kind3<F, R, E, A>, f: (b: B) => A) => Kind3<F, R, E, B>
}

Added in v2.0.0

Contravariant3C (interface)

Signature

export interface Contravariant3C<F extends URIS3, E> {
  readonly URI: F
  readonly _E: E
  readonly contramap: <R, A, B>(fa: Kind3<F, R, E, A>, f: (b: B) => A) => Kind3<F, R, E, B>
}

Added in v2.2.0

Contravariant4 (interface)

Signature

export interface Contravariant4<F extends URIS4> {
  readonly URI: F
  readonly contramap: <S, R, E, A, B>(fa: Kind4<F, S, R, E, A>, f: (b: B) => A) => Kind4<F, S, R, E, B>
}

Added in v2.0.0