DerivedPatterns.Double Active Pattern (F#)

Recognizes constant 64-bit floating point number expressions.

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

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

// Signature:
( |Double|_| ) : (input:Expr) -> float option

Parameters

• input
  Type: Expr

  The input expression to match against.

Return Value

The result of a successful match is the float value.

Remarks

This function is named DoublePattern 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.DerivedPatterns Module (F#)

Microsoft.FSharp.Quotations Namespace (F#)