ts constants into a string at compile time.  Analogous to $(XREF
string,format).

Parameters:

A = tuple of constants, which can be strings, characters, or integral
    values.

Formats:
 *    The formats supported are %s for strings, and %%
 *    for the % character.
Example:
---
import std.metastrings;
import std.stdio;

void main()
{
  string s = Format!("Arg %s = %s", "foo", 27);
  writefln(s); // "Arg foo = 27"
}
 * ---
 */

template Format(A...)
{
    static if (A.length == 0)
        enum Format = ""