I got a little problem with these code:

____________________
double div(T a, U b)() if( a > 0 && b > 0 ){ // not works T and U unknwn
identifier
    return a / b;
}
double div(T,U)(T a, U b) if( a > 0 && b > 0 ){ // not works, a  and b
not known at compile time
    return a / b;
}

double div(double a, double b)() if( a > 0 && b > 0 ){ // works but not
generic
    return a / b;
}
_____________________


The only one who works is a not generic! they are a way? or i need to write for each parameter type?

Am 20.08.2012 23:52, schrieb bioinfornatics:
> I got a little problem with these code:
>
> ____________________
> double div(T a, U b)() if( a > 0 && b > 0 ){ // not works T and U unknwn
> identifier
>      return a / b;
> }
> double div(T,U)(T a, U b) if( a > 0 && b > 0 ){ // not works, a  and b
> not known at compile time
>      return a / b;
> }
>
> double div(double a, double b)() if( a > 0 && b > 0 ){ // works but not
> generic
>      return a / b;
> }
> _____________________
>
>
> The only one who works is a not generic! they are a way? or i need to
> write for each parameter type?
>
Should work with alias,

double div(alias a, alias b)() if( a > 0 && b > 0 ){
    return a / b;
}

On 08/20/2012 11:52 PM, bioinfornatics wrote:
> I got a little problem with these code:
>
> ____________________
> double div(T a, U b)() if( a > 0 && b > 0 ){ // not works T and U unknwn
> identifier
>      return a / b;
> }
> double div(T,U)(T a, U b) if( a > 0 && b > 0 ){ // not works, a  and b
> not known at compile time
>      return a / b;
> }
>
> double div(double a, double b)() if( a > 0 && b > 0 ){ // works but not
> generic
>      return a / b;
> }
> _____________________
>
>
> The only one who works is a not generic! they are a way? or i need to
> write for each parameter type?
>

Alias parameters. auto div(alias a, alias b)().

Thanks to Timon Gehr and David
____
double div(alias a, alias b)() if( a > 0 && b > 0 ){
     return a / b;
}
____

works as expected :-)