Patterns.NewObject Active Pattern (F#)

  • Article

Recognizes expressions that represent the invocation of object constructors.

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

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

// Signature:
( |NewObject|_| ) : (input:Expr) -> (ConstructorInfo * Expr list) option

Parameters

  • input
    Type: Expr

    The input expression to match against.

Return Value

The formal return type is (ConstructorInfo * Expr list) 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 two elements. The first element is a ConstructorInfo object that represents the constructor being called, and the second element is a list of expressions that represent the constructor arguments.

Remarks

This function is named NewObjectPattern 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 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

See Also

Reference

Quotations.Patterns Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)