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Implements the while keyword in asynchronous computation expressions.
Namespace/Module Path: Microsoft.FSharp.Control
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
member this.While : (unit -> bool) * Async<unit> -> Async<unit>
// Usage:
asyncBuilder.While (guard, computation)
Parameters
-
The function to determine when to stop executing computation.
-
The function to be executed. Equivalent to the body of a while expression.
Return Value
An asynchronous computation that behaves similarly to a while loop when run.
Remarks
Creates an asynchronous computation that runs computation repeatedly until guard evaluates to false.
A cancellation check is performed whenever the computation is executed. The existence of this method permits the use of while in the async { ... } computation expression syntax.
Platforms
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
Version Information
F# Core Library Versions
Supported in: 2.0, 4.0, Portable