Operators

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Operators

TaskResult Infix Operators
Namespace: FsToolkit.ErrorHandling.Operator.TaskResult
FsToolkit.ErrorHandling provides the standard infix operators for the map (<!>), apply (<*>), and bind (>>=) functions of the Task<Result<_,_>> type.
Examples:
Example 1
Expanding on the TaskResult.map2 example, we define another function:
notifyFollowers : NotifyNewPostRequest -> Task<Result<unit, exn>>
We can then rewrite the example and additionally call notifyFollowers using the operators as below:
open FsToolkit.ErrorHandling.Operator.TaskResult
​
// CreatePostRequest -> Task<Result<unit, exn>>
let createPostAndNotifyFollowers (req : CreatePostRequest) = 
  notifyNewPostRequest
  <!> (getFollowerIds req.UserId)
  <*> (createPost req)
  >>= notifyFollowers

Computation Expression

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Last modified 9mo ago

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Outline

TaskResult Infix Operators

Examples: