Table of contents
TOC
Collapse the table of content
Expand the table of content

Patterns.WhileLoop Active Pattern (F#)

Den Delimarsky|Last Updated: 8/18/2017
|
1 Contributor

Recognizes expressions that represent while loops.

Namespace/Module Path: Microsoft.FSharp.Quotations.Patterns

Assembly: FSharp.Core (in FSharp.Core.dll)

Syntax

// Signature:
( |WhileLoop|_| ) : (input:Expr) -> (Expr * Expr) option

Parameters

input Type: Expr

The input expression to match against.

Return Value

The formal return type is (Expr * Expr) option. The option value indicates whether there is a match. In a pattern matching expression, the input is decomposed, upon a successful match, into a tuple of expressions. The first element of the tuple is the test expression and the second is the body of the loop.

Remarks

This function is named WhileLoopPattern in the .NET Framework assembly. If you are accessing the member from a .NET Framework language other than F#, or through reflection, use this name.

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

See Also

Quotations.Patterns Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)

© 2017 Microsoft