Exceptions

The Exceptions module provides a set of custom error types used throughout Funkcia for type-safe error handling.

Base Error Class

TaggedError

Extend your errors using this abstract class to enforce _tag identifiers, making error handling easier in your application.

An abstract base class for errors that require a tag for identification.

import { TaggedError } from 'funkcia/exceptions';

class UserNotFound extends TaggedError {
  readonly _tag: 'UserNotFound'
}

General Exceptions

UnwrapError

Error thrown when attempting to unwrap a None value from an Option or an Error value from a Result.

UnknownError

A wrapper for errors caught in try/catch blocks in a Result.

NoValueError

Error used when a nullable value is converted to a Result and is null | undefined.

FailedPredicateError

Error used when a predicate check fails in a Result chain.