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Core.NoEqualityAttribute Class (F#)

Visual Studio 2012

Visual Studio 2010

Adding this attribute to a type indicates it is a type where equality is an abnormal operation. This means that the type does not satisfy the F# equality constraint. Within the bounds of the F# type system, this helps ensure that the F# generic equality function is not instantiated directly at this type. The attribute and checking does not constrain the use of comparison with base or child types of this type.

Namespace/Module Path: Microsoft.FSharp.Core

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

[<AttributeUsage(AttributeTargets.Class ||| AttributeTargets.Interface ||| AttributeTargets.Delegate ||| AttributeTargets.Struct ||| AttributeTargets.Enum, AllowMultiple = false)>]
[<Sealed>]
type NoEqualityAttribute =
 class
  new NoEqualityAttribute : unit -> NoEqualityAttribute
 end

Remarks

You can also use the short form of the name, NoEquality.

Constructors

Member	Description
new	Creates an instance of the attribute

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

Reference

Microsoft.FSharp.Core Namespace (F#)

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