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Patterns.NewDelegate Active Pattern (F#)

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

Recognizes expressions that represent the construction of delegate values.

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

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


// Signature:
( |NewDelegate|_| ) : (input:Expr) -> (Type * Var list * Expr) option


input Type: Expr

The input expression to match against.

Return Value

The formal return type is (Type * Var list * Expr) option. The option indicates whether the input results in a match. In a pattern matching expression, the input expression is decomposed, upon a successful match, into a tuple that has three elements. The first element is a System.Type object that represents the delegate type. The second element is a list that represents delegate arguments as Var objects. The last element is an expression that represents the invocation of the delegate.


This function is named NewDelegatePattern 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.


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#)

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