Hi,


it is written on the D web site (http://www.digitalmars.com//d/htomodule.html) that macros like

#define MAX(a,b) ((a) < (b) ? (b) : (a))

should be remplaced by :

int MAX(int a, int b) { return (a < b) ? b : a); }

But what if we want real, float or double type for the arguments ? iS it possible to overload the function ?

Best regards

Pac

"Pac" <Pac_member@pathlink.com> wrote in message news:cd6hmp$2am7$1@digitaldaemon.com...
> Hi,
>
>
> it is written on the D web site
(http://www.digitalmars.com//d/htomodule.html)
> that macros like
>
> #define MAX(a,b) ((a) < (b) ? (b) : (a))
>
> should be remplaced by :
>
> int MAX(int a, int b) { return (a < b) ? b : a); }
>
> But what if we want real, float or double type for the arguments ? iS it possible to overload the function ?
>
> Best regards
>
> Pac

Yes, you can overload functions. But in this case, a template might be better:


template MAX(T)
{
   T MAX(T a, T b)  { return (a < b) ? b : a); }
}

int foo = MAX!(int)(1, 2);
float bar = MAX!(float)(1.0, 2.0);

Vathix wrote:

> "Pac" <Pac_member@pathlink.com> wrote in message news:cd6hmp$2am7$1@digitaldaemon.com...
>> Hi,
>>
>>
>> it is written on the D web site
> (http://www.digitalmars.com//d/htomodule.html)
>> that macros like
>>
>> #define MAX(a,b) ((a) < (b) ? (b) : (a))
>>
>> should be remplaced by :
>>
>> int MAX(int a, int b) { return (a < b) ? b : a); }
>>
>> But what if we want real, float or double type for the arguments ? iS it possible to overload the function ?
>>
>> Best regards
>>
>> Pac
> 
> Yes, you can overload functions. But in this case, a template might be better:
> 
> 
> template MAX(T)
> {
>    T MAX(T a, T b)  { return (a < b) ? b : a); }
> }
> 
> int foo = MAX!(int)(1, 2);
> float bar = MAX!(float)(1.0, 2.0);

... once again crying out for implicit instantiation of function templates. :-)

"Norbert Nemec" <Norbert.Nemec@gmx.de> wrote in message news:cd7toq$2spk$1@digitaldaemon.com...
> Vathix wrote:
>
> > "Pac" <Pac_member@pathlink.com> wrote in message news:cd6hmp$2am7$1@digitaldaemon.com...
> >> Hi,
> >>
> >>
> >> it is written on the D web site
> > (http://www.digitalmars.com//d/htomodule.html)
> >> that macros like
> >>
> >> #define MAX(a,b) ((a) < (b) ? (b) : (a))
> >>
> >> should be remplaced by :
> >>
> >> int MAX(int a, int b) { return (a < b) ? b : a); }
> >>
> >> But what if we want real, float or double type for the arguments ? iS it possible to overload the function ?
> >>
> >> Best regards
> >>
> >> Pac
> >
> > Yes, you can overload functions. But in this case, a template might be better:
> >
> >
> > template MAX(T)
> > {
> >    T MAX(T a, T b)  { return (a < b) ? b : a); }
> > }
> >
> > int foo = MAX!(int)(1, 2);
> > float bar = MAX!(float)(1.0, 2.0);
>
> ... once again crying out for implicit instantiation of function templates. :-)

Hey, you should see the mess I'm in with DTL without impl ex.! Nonetheless, the fog's are slowly clearing ... :)

Norbert Nemec wrote:
>>Yes, you can overload functions. But in this case, a template might be
>>better:
>>
>>
>>template MAX(T)
>>{
>>   T MAX(T a, T b)  { return (a < b) ? b : a); }
>>}
>>
>>int foo = MAX!(int)(1, 2);
>>float bar = MAX!(float)(1.0, 2.0);
> 
> 
> ... once again crying out for implicit instantiation of function
> templates. :-)

And how: <http://andy.tadan.us/d/tuple.d>

 -- andy