How to removes an variable topmost const. like remove_const in C++.

[lili]

Hi:
    I write a template function is below, that need to remove 
const topmost if has.
     How to do this?

    const int i =3;
    println(i);
   void println(A...)(A a)
     {
         char[20] numStr = void;

         foreach(v ; a) {
             if (is(v.type == byte)  || is(v.type == ubyte) ||
                 is(v.type == short) || is(v.type == ushort) ||
                 is(v.type == int)   || is(v.type == uint) ||
                 is(v.type == long)  || is(v.type == ulong)) {
                 //did not wirte const types ... again.

                 ulong n = cast(ulong)v;
                 bool isNeg = false;
                 if (v < 0) {
                     isNeg = true;
                     if (n != 1<<63)
                         n = -v;
                 }

                 int i=0;
                 while(n !=0 ) {
                     numStr[i++] = (n%10) + '0';
                     n/=10;
                 }

                 if (isNeg)
                     putc('-');

                 while (--i >= 0)
                     putc(numStr[i]);
             } else if (is(v.type == char*) || is(v.type == const 
char*)) {
                 puts(v);
             } else if (is(v.type == bool)) {
                  puts(v ? "true":"false");
             } else if (is(v.type == char)) {
                  putc(v);
             } else {
                 static assert(false);
             }
         }
     }