The clue may be that both...
t.Test<IA, B<IA>>();
t.Test<IA, IB<IA>>();
and compile, thus there are multiple solutions....even so it should be
asking me to clarify by passing type parameters, not claiming no such
parameters exist.
> -----Original Message-----
> From: Discussion of advanced .NET topics. [mailto:ADVANCED-
> [EMAIL PROTECTED] On Behalf Of Nicholls, Mark
> Sent: 28 February 2008 15:39
> To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
> Subject: Re: [ADVANCED-DOTNET] extensions methods and type
inference....
>
> Ok here's a simple example....
>
>
> public interface IA
> {
> }
>
> public interface IB<T>
> where T : IA
> {
> }
>
> public class B<T> : IB<T>
> where T : IA
> {
> }
>
>
> public static class Extension
> {
> static public void Test<A,B>(this B b)
> where B : IB<A>
> where A : IA
> {
> }
> }
>
>
> static void Main()
> {
> B<IA> t = new B<IA>();
> t.Test(); // #1
> t.Test<IA, B<IA>>(); // #2
> }
>
> #2 compiles...
> #1 complains.
>
> "Error 1
> 'WindowsFormsApplication3.B<WindowsFormsApplication3.IA>' does not
> contain a definition for 'Test' and no extension method 'Test'
accepting
> a first argument of type
> 'WindowsFormsApplication3.B<WindowsFormsApplication3.IA>' could be
found
> (are you missing a using directive or an assembly reference?)
> C:\Documents and Settings\nichom\My Documents\Visual Studio
>
2008\Projects\WindowsFormsApplication3\WindowsFormsApplication3\Program.
> cs 17 13 WindowsFormsApplication3"
>
> Yet clearly #2 proves the error to be incorrect...there is a
solution...
>
>
>
>
>
>
> > -----Original Message-----
> > From: Discussion of advanced .NET topics. [mailto:ADVANCED-
> > [EMAIL PROTECTED] On Behalf Of Per Bolmstedt
> > Sent: 28 February 2008 13:55
> > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
> > Subject: Re: [ADVANCED-DOTNET] extensions methods and type
> inference....
> >
> > On Thu, 28 Feb 2008 08:50:19 -0500, Mark Nicholls
> > <[EMAIL PROTECTED]>
> > wrote:
> >
> > > but I can actually explicitly define the types e.g.
> > > x.BLA<int,object>(foo,bar);
> > > and the compiler will happily accept it...and run it.
> >
> > Surely x is an instance here, not a type? Could you post actual
code?
> >
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>
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