Re: [slang-users] What is DataType_Type??

[Duke Normandin <dukeofperl@xxxxxxxxxxx>]

On Tue, 20 Nov 2012 07:18:02 +0100
Manfred Hanke <Manfred.Hanke@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hi Duke,
> 
> > I gather then that a datatype cannot be "assigned" to a
> > variable. Is that correct?
>
> No. Just as `b' in your example, you can define:
>   variable b2 = Double_Type;
> 
> > So what's a DataType_Type??
> 
> DataType_Type is the type that describes datatypes... ;-)
> See the end of §4.1 @
> http://www.jedsoft.org/slang/doc/html/slang-4.html
> 
> > A catch-all type, sort of?
>
> I'm not sure what you mean, though I agree it's a kind of
> meta-DataType. But you can use it just as any other type:
> 
>   private variable my_favourites = DataType_Type[3];
>   my_favourites[0] = Array_Type;
>   my_favourites[1] = Double_Type;
>   my_favourites[2] = Integer_Type;
> 
>   define is_one_of_my_favourite_types(value)
>   {
>      return any( my_favourites == typeof(value) );
>   }


> > -------------------------------8<---------------------------------------
> > a=2.3;
> > 
> > () = printf ( "The variable 'a' has this data-type %S\n",
> > typeof(a) );
> > 
> > variable b = typeof(a);
> > 
> > () = printf ( "The variable 'b' has this data-type %S\n",
> > typeof(b) );
> 
> _______________________________________________


Hey, Manfred ....

Thanks for the explanation!  Got it!!

--
Duke

_______________________________________________
slang-users-l mailing list
slang-users-l@xxxxxxxxxxx
http://mailman.jedsoft.org/mailman/listinfo/slang-users-l