Hello,
2010/1/20, Michael 'Mickey' Lauer <[email protected]>:
> Hi,
>
> the attached source file fails to compile with:
>
> foo.vala:19.34-19.46: error: Argument 1: Cannot convert from
> `myIntCallback' to `GenericClass.Callback'
> var gc = new GenericClass<int>( myIntCallback );
> ^^^^^^^^^^^^^
>
> Apparantly, Vala does not recognize the equality of the generic
> and the concrete type. Is there any way to work around that?
The workaround I see is to use a generic delegate instead of a
delegate-in-a-generic-class, still this needs an explicit cast, but it
works :
public delegate void Callback<T>( T element );
public class GenericClass<T>
{
private Callback<T> cb;
public GenericClass(Callback<T> cb)
{
this.cb = cb;
}
}
public void myIntCallback( int element )
{
message( @"$element" );
}
void main()
{
var gc = new GenericClass<int>((Callback<int>) myIntCallback);
}
HTH,
Abderrahim
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