Return type depends on his argument's template

TSalm tsalm at free.fr
Sun Jul 6 06:46:10 PDT 2008


Great !
Thanks Simen


On Sat, 05 Jul 2008 11:34:29 +0200, Simen Kjaeraas wrote:

> TSalm <tsalm at free.fr> wrote:
> 
>> Hello,
>>
>> Is there a way to do this :
>>
>> /* ------------------------------------- */ class A(T)
>> {
>>   // some methods
>> }
>>
>> class B
>> {
>>   T getValue( A(T) a )  // <-- Here, the type of the return value
>>                         //     is the type T of A(T)
>>   {  /* some code */  }
>> }
>> /* ------------------------------------- */
>>
>>
>> thanks in advance,
>> TSalm
> 
> If I understand you correctly, this can be done like so:
> 
> class A(T)
> {
> }
> 
> class B
> {
> 	T getValue(U : A!(T), T)(U a)
> 	{
> 	 // some code
> 	}
> }
> 
> -- Simen



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