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DerivedPatterns.String Active Pattern (F#)

  • Artykuł

Recognizes constant string expressions.

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

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

// Signature:
( |String|_| ) : (input:Expr) -> string option

Parameters

  • input
    Type: Expr

    The input expression to match against.

Return Value

The result of a successful match is the string value.

Remarks

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

Microsoft.FSharp.Quotations Namespace (F#)