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DerivedPatterns.AndAlso Active Pattern (F#)

Visual Studio 2012

Visual Studio 2010

Recognizes expressions of the form a && b.

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

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

// Signature:
( |AndAlso|_| ) : (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 indicates whether the input results in a match. In a pattern matching expression, the input is decomposed, upon a successful match, into a tuple of the two sub-expressions involved in the Boolean AND expression.

Remarks

This function is named AndAlsoPattern 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

Reference

Quotations.DerivedPatterns Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)

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