@effect-ts/system/_src/Experimental/Stream/Channel/api/mapErrorCause.ts

Effect-TS is a zero dependency set of libraries to write highly productive, purely functional TypeScript at scale.

// ets_tracing: off

import type * as CS from "../../../../Cause/index.js"
import * as C from "../core.js"

/**
 * A more powerful version of `mapError` which also surfaces the `Cause` of the channel failure
 */
export function mapErrorCause_<
  Env,
  InErr,
  InElem,
  InDone,
  OutErr,
  OutErr2,
  OutElem,
  OutDone
>(
  self: C.Channel<Env, InErr, InElem, InDone, OutErr, OutElem, OutDone>,
  f: (cause: CS.Cause<OutErr>) => CS.Cause<OutErr2>
): C.Channel<Env, InErr, InElem, InDone, OutErr2, OutElem, OutDone> {
  return C.catchAllCause_(self, (cause) => C.failCause(f(cause)))
}

/**
 * A more powerful version of `mapError` which also surfaces the `Cause` of the channel failure
 *
 * @ets_data_first mapErrorCause_
 */
export function mapErrorCause<OutErr, OutErr2>(
  f: (cause: CS.Cause<OutErr>) => CS.Cause<OutErr2>
) {
  return <Env, InErr, InElem, InDone, OutElem, OutDone>(
    self: C.Channel<Env, InErr, InElem, InDone, OutErr, OutElem, OutDone>
  ) => mapErrorCause_(self, f)
}