WriterT overview

Added in v2.4.0


Table of contents


WriterM (interface)

Signature

export interface WriterM<M> {
  readonly map: <W, A, B>(fa: WriterT<M, W, A>, f: (a: A) => B) => WriterT<M, W, B>
  readonly evalWriter: <W, A>(fa: WriterT<M, W, A>) => HKT<M, A>
  readonly execWriter: <W, A>(fa: WriterT<M, W, A>) => HKT<M, W>
  readonly tell: <W>(w: W) => WriterT<M, W, void>
  readonly listen: <W, A>(fa: WriterT<M, W, A>) => WriterT<M, W, [A, W]>
  readonly pass: <W, A>(fa: WriterT<M, W, [A, (w: W) => W]>) => WriterT<M, W, A>
  readonly listens: <W, A, B>(fa: WriterT<M, W, A>, f: (w: W) => B) => WriterT<M, W, [A, B]>
  readonly censor: <W, A>(fa: WriterT<M, W, A>, f: (w: W) => W) => WriterT<M, W, A>
  readonly getMonad: <W>(
    M: Monoid<W>
  ) => {
    readonly _E: W
    readonly map: <A, B>(ma: WriterT<M, W, A>, f: (a: A) => B) => WriterT<M, W, B>
    readonly of: <A>(a: A) => WriterT<M, W, A>
    readonly ap: <A, B>(mab: WriterT<M, W, (a: A) => B>, ma: WriterT<M, W, A>) => WriterT<M, W, B>
    readonly chain: <A, B>(ma: WriterT<M, W, A>, f: (a: A) => WriterT<M, W, B>) => WriterT<M, W, B>
  }
}

Added in v2.4.0

WriterM1 (interface)

Signature

export interface WriterM1<M extends URIS> {
  readonly map: <W, A, B>(fa: WriterT1<M, W, A>, f: (a: A) => B) => WriterT1<M, W, B>
  readonly evalWriter: <W, A>(fa: WriterT1<M, W, A>) => Kind<M, A>
  readonly execWriter: <W, A>(fa: WriterT1<M, W, A>) => Kind<M, W>
  readonly tell: <W>(w: W) => WriterT1<M, W, void>
  readonly listen: <W, A>(fa: WriterT1<M, W, A>) => WriterT1<M, W, [A, W]>
  readonly pass: <W, A>(fa: WriterT1<M, W, [A, (w: W) => W]>) => WriterT1<M, W, A>
  readonly listens: <W, A, B>(fa: WriterT1<M, W, A>, f: (w: W) => B) => WriterT1<M, W, [A, B]>
  readonly censor: <W, A>(fa: WriterT1<M, W, A>, f: (w: W) => W) => WriterT1<M, W, A>
  readonly getMonad: <W>(
    M: Monoid<W>
  ) => {
    readonly _E: W
    readonly map: <A, B>(ma: WriterT1<M, W, A>, f: (a: A) => B) => WriterT1<M, W, B>
    readonly of: <A>(a: A) => WriterT1<M, W, A>
    readonly ap: <A, B>(mab: WriterT1<M, W, (a: A) => B>, ma: WriterT1<M, W, A>) => WriterT1<M, W, B>
    readonly chain: <A, B>(ma: WriterT1<M, W, A>, f: (a: A) => WriterT1<M, W, B>) => WriterT1<M, W, B>
  }
}

Added in v2.4.0

WriterM2 (interface)

Signature

export interface WriterM2<M extends URIS2> {
  readonly map: <E, W, A, B>(fa: WriterT2<M, E, W, A>, f: (a: A) => B) => WriterT2<M, E, W, B>
  readonly evalWriter: <E, W, A>(fa: WriterT2<M, E, W, A>) => Kind2<M, E, A>
  readonly execWriter: <E, W, A>(fa: WriterT2<M, E, W, A>) => Kind2<M, E, W>
  readonly tell: <E, W>(w: W) => WriterT2<M, E, W, void>
  readonly listen: <E, W, A>(fa: WriterT2<M, E, W, A>) => WriterT2<M, E, W, [A, W]>
  readonly pass: <E, W, A>(fa: WriterT2<M, E, W, [A, (w: W) => W]>) => WriterT2<M, E, W, A>
  readonly listens: <E, W, A, B>(fa: WriterT2<M, E, W, A>, f: (w: W) => B) => WriterT2<M, E, W, [A, B]>
  readonly censor: <E, W, A>(fa: WriterT2<M, E, W, A>, f: (w: W) => W) => WriterT2<M, E, W, A>
  readonly getMonad: <W>(
    M: Monoid<W>
  ) => {
    readonly _E: W
    readonly map: <E, A, B>(ma: WriterT2<M, E, W, A>, f: (a: A) => B) => WriterT2<M, E, W, B>
    readonly of: <E, A>(a: A) => WriterT2<M, E, W, A>
    readonly ap: <E, A, B>(mab: WriterT2<M, E, W, (a: A) => B>, ma: WriterT2<M, E, W, A>) => WriterT2<M, E, W, B>
    readonly chain: <E, A, B>(ma: WriterT2<M, E, W, A>, f: (a: A) => WriterT2<M, E, W, B>) => WriterT2<M, E, W, B>
  }
}

Added in v2.4.0

WriterM2C (interface)

Signature

export interface WriterM2C<M extends URIS2, E> {
  readonly map: <W, A, B>(fa: WriterT2<M, E, W, A>, f: (a: A) => B) => WriterT2<M, E, W, B>
  readonly evalWriter: <W, A>(fa: WriterT2<M, E, W, A>) => Kind2<M, E, A>
  readonly execWriter: <W, A>(fa: WriterT2<M, E, W, A>) => Kind2<M, E, W>
  readonly tell: <W>(w: W) => WriterT2<M, E, W, void>
  readonly listen: <W, A>(fa: WriterT2<M, E, W, A>) => WriterT2<M, E, W, [A, W]>
  readonly pass: <W, A>(fa: WriterT2<M, E, W, [A, (w: W) => W]>) => WriterT2<M, E, W, A>
  readonly listens: <W, A, B>(fa: WriterT2<M, E, W, A>, f: (w: W) => B) => WriterT2<M, E, W, [A, B]>
  readonly censor: <W, A>(fa: WriterT2<M, E, W, A>, f: (w: W) => W) => WriterT2<M, E, W, A>
  readonly getMonad: <W>(
    M: Monoid<W>
  ) => {
    readonly _E: W
    readonly map: <A, B>(ma: WriterT2<M, E, W, A>, f: (a: A) => B) => WriterT2<M, E, W, B>
    readonly of: <A>(a: A) => WriterT2<M, E, W, A>
    readonly ap: <A, B>(mab: WriterT2<M, E, W, (a: A) => B>, ma: WriterT2<M, E, W, A>) => WriterT2<M, E, W, B>
    readonly chain: <A, B>(ma: WriterT2<M, E, W, A>, f: (a: A) => WriterT2<M, E, W, B>) => WriterT2<M, E, W, B>
  }
}

Added in v2.4.0

WriterM3 (interface)

Signature

export interface WriterM3<M extends URIS3> {
  readonly map: <R, E, W, A, B>(fa: WriterT3<M, R, E, W, A>, f: (a: A) => B) => WriterT3<M, R, E, W, B>
  readonly evalWriter: <R, E, W, A>(fa: WriterT3<M, R, E, W, A>) => Kind3<M, R, E, A>
  readonly execWriter: <R, E, W, A>(fa: WriterT3<M, R, E, W, A>) => Kind3<M, R, E, W>
  readonly tell: <R, E, W>(w: W) => WriterT3<M, R, E, W, void>
  readonly listen: <R, E, W, A>(fa: WriterT3<M, R, E, W, A>) => WriterT3<M, R, E, W, [A, W]>
  readonly pass: <R, E, W, A>(fa: WriterT3<M, R, E, W, [A, (w: W) => W]>) => WriterT3<M, R, E, W, A>
  readonly listens: <R, E, W, A, B>(fa: WriterT3<M, R, E, W, A>, f: (w: W) => B) => WriterT3<M, R, E, W, [A, B]>
  readonly censor: <R, E, W, A>(fa: WriterT3<M, R, E, W, A>, f: (w: W) => W) => WriterT3<M, R, E, W, A>
  readonly getMonad: <W>(
    M: Monoid<W>
  ) => {
    readonly _E: W
    readonly map: <R, E, A, B>(ma: WriterT3<M, R, E, W, A>, f: (a: A) => B) => WriterT3<M, R, E, W, B>
    readonly of: <R, E, A>(a: A) => WriterT3<M, R, E, W, A>
    readonly ap: <R, E, A, B>(
      mab: WriterT3<M, R, E, W, (a: A) => B>,
      ma: WriterT3<M, R, E, W, A>
    ) => WriterT3<M, R, E, W, B>
    readonly chain: <R, E, A, B>(
      ma: WriterT3<M, R, E, W, A>,
      f: (a: A) => WriterT3<M, R, E, W, B>
    ) => WriterT3<M, R, E, W, B>
  }
}

Added in v2.4.0

WriterT (interface)

Signature

export interface WriterT<M, W, A> {
  (): HKT<M, [A, W]>
}

Added in v2.4.0

WriterT1 (interface)

Signature

export interface WriterT1<M extends URIS, W, A> {
  (): Kind<M, [A, W]>
}

Added in v2.4.0

WriterT2 (interface)

Signature

export interface WriterT2<M extends URIS2, E, W, A> {
  (): Kind2<M, E, [A, W]>
}

Added in v2.4.0

WriterT3 (interface)

Signature

export interface WriterT3<M extends URIS3, R, E, W, A> {
  (): Kind3<M, R, E, [A, W]>
}

Added in v2.4.0

getWriterM

Signature

export function getWriterM<M extends URIS3>(M: Monad3<M>): WriterM3<M>
export function getWriterM<M extends URIS2>(M: Monad2<M>): WriterM2<M>
export function getWriterM<M extends URIS2, E>(M: Monad2C<M, E>): WriterM2C<M, E>
export function getWriterM<M extends URIS>(M: Monad1<M>): WriterM1<M>
export function getWriterM<M>(M: Monad<M>): WriterM<M> { ... }

Added in v2.4.0