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Naming active patterns?
f#

Basically I have an active pattern that Visual Studio is telling me is improperly named ("This is not a valid name for an active pattern"). Can anybody point out what I am doing wrong? Thanks.

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let (|Six|Eight|Twelve|_|) (input : int) = 
    if input = 0 then Some(Six)
    elif input = 1 then Some(Eight)
    elif input = 2 then Some(Twelve)
    else None
.

Active patterns are either 'partial' (have an _ case) or 'multicase', but not both.

You want one of these two:

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    let (|Six|Eight|Twelve|Other|) (input : int) = 
        if input = 0 then Six
        elif input = 1 then Eight
        elif input = 2 then Twelve
        else Other
 
    let (|Six|_|) (input : int) = 
        if input = 0 then Some(Six)
        else None
    let (|Eight|_|) (input : int) = 
        if input = 1 then Some(Eight)
        else None
    let (|Twelve|_|) (input : int) = 
        if input = 2 then Some(Twelve)
        else None
By on 6/22/2010 2:18 PM ()

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