Template tuple parameters of classes

[tsalm]

Le Fri, 01 Aug 2008 09:52:46 +0200, ws <wisiong at gmail.com> a écrit:

> Tsalm Wrote:
>
>> On Wed, 30 Jul 2008 21:33:05 -0400, ws wrote:
>>
>> > TSalm Wrote:
>> >> I've got a class MyClass :
>> >>   class MyClass(T) {}
>> >>
>> >> And I need them in Template Tuple Parameter. Something like this :
>> >>   void myFunction
>> >>           ( U:MyClass!(T),T , U2:MyClass!(T2),T2... ) ( U myClass ,  
>> U2
>> >>           myClass2...)
>> >>   	  {  /* ...some code... */ }
>> >>
>> >>
>> >> call by :
>> >>   MyClass!(int) mine1;
>> >>   MyClass!(double) mine2;
>> >>   MyClass!(char) mine3;
>> >>   myFunction( mine1 , mine2 , mine3 );
>> >>
>> >> but.of course, 'myFunction' is incorrect... How to declare it ?
>> >>
>> >
>> > Perhaps this post by Jarrett is of help:
>> > http://lists.puremagic.com/pipermail/digitalmars-d/2007-
>> October/026373.html
>>
>> It is very interresting. Thanks.
>>
>>
>> I'm trying this :
>> /* -------------------- */
>> class MyClass(T)
>> {
>>  T getTypeMin() {return T.min;}
>> }
>>
>> template Print(U ...)
>> {
>>   void Print()
>>   {
>>     Stdout(U[0].getTypeMin()).newline;
>>   }
>> }
>>
>> void main()
>> {
>>   MyClass!(int) mine1;
>>   MyClass!(double) mine2;
>>   MyClass!(float) mine3;
>>
>>   Print!(mine1,mine2,mine3);
>> }
>> /* -------------------- */
>>
>> But the execution send me an Access Violation !?
>
> The variables are not allocated.
> Try this:
> class MyClass(T)
> {
> T getTypeMin() {return T.min;}
> }
> template Print(U ...)
> {
>   void Print()
>   {
>     static if (U.length >= 1)
>    {
>      Stdout(U[0].getTypeMin());
>      Print!(U[1..$]);
>    }
>  }
> }
>
> void main()
> {
>   auto mine1 = new MyClass!(int);
>   auto mine2 = new MyClass!(double);
>   auto mine3 = new MyClass!(float);
>   Print!(mine1,mine2,mine3);
> }
>
It work.
thanks !

Another question in the same sense : is there a way to do this :
( the aim is to work with the type   (T)  of the instance of MyClass    )

/* --------------------------------------- */
import tango.io.Stdout;

class MyClass(T)
{}

template Print(U: MyClass!(T),T ...)
{
   void Print()
   {
     static if (U.length >= 1)
    {
      Stdout(T[0].sizeof);
      Print!(U[1..$]);
    }
  }
}

void main()
{
   auto mine1 = new MyClass!(int);
   auto mine2 = new MyClass!(double);
   auto mine3 = new MyClass!(float);
   Print!(mine1,mine2,mine3);
}
/* --------------------------------------- */