Constant template arguments

[Meta via Digitalmars-d]

On Saturday, 3 January 2015 at 12:45:47 UTC, bearophile wrote:
>> void foo(T)(Unqual!T a, Unqual!T b) {
>>    a = b;
>>    b = a;
>> }
>> void main() {
>>    const int x, y;
>>    foo(x, y);
>> }
>
> Missing line:
>
> import std.traits: Unqual;
>
> Bye,
> bearophile

Wouldn't it be better to do this at the call site anyway? Just 
use a simple function.

Unqual!T unconst(T)(T val)
if (isScalarType!T)
{
     return val;
}

void foo(T)(T a, T b)
{
     a = b;
     b = a;
}

void main()
{
     const int x, y;
     foo(x.unconst, y.unconst);
}