README
Last updated
Last updated
FsToolkit.ErrorHandling is a utility library to work with the Result
type in F#, and allows you to do clear, simple and powerful error handling.
The library provides utility functions like map
, bind
, apply
, traverse
, sequence
as well as computation expressions and infix operators to work with Result<'a, 'b>
, Result<'a option, 'b>
, Async<Result<'a, 'b>>
, Async<Result<'a option, 'b>>
, and Result<'a, 'b list>
.
With adding a reference to FsToolkit.ErrorHandling.TaskResult
you will also have access to computation expressions and infix operators related to Task<Result<'a, 'b>>
.
It was inspired by Chessie and Cvdm.ErrorHandling (the latter has now been merged into FsToolkit.ErrorHandling).
FsToolkit.ErrorHandling targets .NET Standard 2.0 and .NET Framework 4.6.1 and supports Fable.
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This documentation assumes some familiarity with standard functions like map
, apply
, bind
, traverse
and sequence
and the problem these functions solve. If this is new to you, check out Scott Wlaschin’s excellent tutorial on the subject.
This example of composing a login flow shows one example of how this library can aid in clear, simple, and powerful error handling, using just a computation expression and a few helper functions. (The library has many more helper functions and computation expressions as well as infix operators; see the rest of the documentation for details.)
FsToolkit.ErrorHandling
FsToolkit.ErrorHandling.TaskResult