effect-io-ai

Package: effect
Module: Config

Config.mapOrFail

Transforms the parsed value with a function that may fail.

When to use

Use when you need to transform a parsed config value with a function that can produce a ConfigError (e.g. parsing a URL, checking a range).

Example (Wrapping a value in an effectful transformation)

import { Config, Effect } from "effect"

const trimmed = Config.string("name").pipe(
  Config.mapOrFail((s) => Effect.succeed(s.trim()))
)

See

• map – when the transformation cannot fail

Signature

declare const mapOrFail: { <A, B>(f: (a: A) => Effect.Effect<B, ConfigError>): (self: Config<A>) => Config<B>; <A, B>(self: Config<A>, f: (a: A) => Effect.Effect<B, ConfigError>): Config<B>; }

Source

Since v2.0.0