NullableOperators.( ?- )<^T1,^T2,^T3> Function (F#)

  • Article

The subtraction operator where a nullable value appears on the left.

Namespace/Module Path: Microsoft.FSharp.Linq.NullableOperators

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

// Signature:
( ?- ) : Nullable<^T1> -> ^T2 -> Nullable<^T3> when ^T1 with static member (-) and ^T1 : (new : unit ->  ^T1) and ^T1 : struct and ^T1 :> ValueType and ^T2 with static member (-) and ^T3 : (new : unit ->  ^T3) and ^T3 : struct and ^T3 :> ValueType

// Usage:
nullableValue ?- value

Parameters

  • nullableValue
    Type: Nullable<T><^T1>

    The first input value, as a nullable value.

  • value
    Type: ^T2

    The second input value.

Return Value

The result of the subtraction, as a nullable value.

Remarks

If the first value is null, then the result is null, as a nullable value.

Platforms

Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

Version Information

F# Core Library Versions

Supported in: 4.02.0, 4.0, Portable

See Also

Reference

Linq.NullableOperators Module (F#)

Microsoft.FSharp.Linq Namespace (F#)