effect-io-ai

Package: effect
Module: Exit

Exit.hasFails

Checks whether a failed Exit contains typed errors (Fail reasons).

When to use

Use to distinguish typed failures from defects or interruptions.

Details

Returns false for successful exits. Only checks for Fail reasons in the Cause. A Cause with only Die or Interrupt reasons returns false.

Example (Checking for typed errors)

import { Exit } from "effect"

console.log(Exit.hasFails(Exit.fail("err")))           // true
console.log(Exit.hasFails(Exit.die(new Error("bug")))) // false
console.log(Exit.hasFails(Exit.succeed(42)))            // false

See

• hasDies to check for defects
• hasInterrupts to check for interruptions

Signature

declare const hasFails: <A, E>(self: Exit<A, E>) => self is Failure<A, E>

Source

Since v4.0.0