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Patterns.TypeTest Active Pattern (F#)

  • Article

Recognizes expressions that represent a dynamic type test.

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

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

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

Parameters

  • input
    Type: Expr

    The input expression to match against.

Return Value

The formal return type is (Expr * Type) option. The option indicates whether the input results in a match. In a pattern matching expression, the input is decomposed into a tuple of two elements. The first element is an expression that represents the target of the type test. The second element is a Type object that represents the type to test for.

Remarks

This function is named TypeTestPattern 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

Reference

Quotations.Patterns Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)