ErrorOr.Extensions 1.3.0

ErrorOr.Extensions

An extension library for ErrorOr by Amichai Mantinband.

Features

This library extends the ErrorOr library with useful features to allow for some specific workflows, for creating meaningful error handling in your applications.

LINQ and LINQ async

This library provides LINQ extensions for ErrorOr. This enables a very clean approach of binding multiple ErrorOr generating function together. You can write them with the usual from x in y select x syntax you know and love from LINQ. If an error occurs along the way, processing of the chain is interrupted and the collected errors are passed to the resulting instance of ErrorOr<T>.

Example:

ErrorOr<string> errorOr =
    from userId in ParseInput("10")            // returns ErrorOr<int>
    from user in userRepository.Lookup(userId) // returns ErrorOr<User>
    select user.Name                           // maps to string

This also works if the methods that are chained are asynchronous:

Task<ErrorOr<string>> errorOr =
    from userId in ParseInput("10")            // returns Task<ErrorOr<int>>
    from user in userRepository.Lookup(userId) // returns Task<ErrorOr<User>>
    select user.Name                           // maps to string

Closing

The author of this extension library is not affiliated with Amichai Mantinband nor does he claim anything from the ErrorOr library.