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How to use System.Type.IsDefined method in F#
f#

The following is a C# class .

public sealed class LocalServiceAttribute : Attribute {
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
public static bool IsLocalService(Type serviceInterface) {

if (serviceInterface == null) {
throw new ArgumentNullException("serviceInterface");
}
return serviceInterface.IsDefined(typeof(LocalServiceAttribute), false);
}
}

How can I use Patterns or If -else expression for converting these code to F#?
Thanks!

.

The bold line looks just like C#, except that in F# "typeof" takes angle brackets instead of round ones.

See also

[link:lorgonblog.spaces.live.com]

By on 2/5/2009 7:05 AM ()

When I tried to use IsDefined instance method,I got one error message.
The following is my fsharp code.

type LocalServiceAttribute =
inherit System.Attribute
static member IsLocalService serviceInterface:System.Type -> bool =
serviceInterface.IsDefined(typeof<LocalServiceAttribute>,false)

Error Message like this.
// Error 1 Lookup on object of indeterminate type based on information prior to this program point. A type annotation may be needed prior to this program point to constrain the type of the object. This may allow the lookup to be resolved C:\Users\Venus\Library1\Generic.fs

By on 2/7/2009 4:58 AM ()

Here's the syntax:

static member IsLocalService (serviceInterface:System.Type) : bool =

By on 2/7/2009 10:25 AM ()

Thank you

By on 2/5/2009 5:35 PM ()

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