Template specialisation for range of types

[data pulverizer via Digitalmars-d-learn]

Hello all,

I am attempting to write templates for differently qualified 
types using specialisations. Below is an example for const and 
non-const outlining my approach:


``````````````````````````
import std.stdio : writeln;
import std.traits : ConstOf;

auto max(T)(T x, T y)
{
        writeln("General template");
        return x > y ? x : y;
}


auto max(T: ConstOf!U, U)(T* x, T* y)
{
        writeln("Const template");
        return *x > *y ? x : y;
}


void main(){
        const double p = 2.4, q = 3;
        writeln(max(&p, &q));
}
``````````````````````````

I get this output:

General template
7FFE5B3759A8


In this case would like to use the ConstOf specialisation instead 
of the default implementation for the inputs which are const.

Thanks for you answers in advance