Hello,
I'm searching to have a generic comparator function.
I done this :
/* ------------ CODE -------------------- */
import tango.io.Stdout;
/***
* Not for arrays
***/
int compare(T)(T o1,T o2)
{
static if ( is( T bar == class ) || is( T bar == struct ) )
return o1.opCmp(o2);
else
return o2 - o1;
}
/***
* For arrays
***/
int compare(T:T[])(T[] o1,T[] o2)
{
size_t minLength = ( o1.length<o2.length ? o1.length : o2.length) ;
for (size_t i=0;i<minLength;i++)
{
int result = compare(o1[i],o2[i]);
if (result != 0)
return result;
}
return o2.length - o1.length ;
}
/***
* Test
***/
void main()
{
byte[] a = [10,12,13];
byte[] b = [15,16,17];
Stdout( compare(a,b) ).newline ;
}
/* ------------ END CODE ---------------- */
But this code return a compilation error :
test_cmp.d(12): Error: cannot implicitly convert expression (o2 - o1) of
type byte[] to int
test_cmp.d(41): template instance test_cmp.compare!(byte[]) error
instantiating
It seems it's the first compare function (without array in parameter)
which is hook.
How can I declare this compare function to use specific code to compare
arrays ?
Thanks in advance,
TSalm
