> - Printing functions wrong argument number warning: this is something D needs > to add, for writef, writefln, printf, sprintf, etc (even if it can't work in all situations).
Can you make it work in some situations without breaking the others? If you have a compile time string passed in, it could check the argument count, but not all strings are compile time. I use runtime concatenated strings to format() like functions where additional data is requested on a branch. I've actually wondered in the past if doing overloads based on if it is known at compile time or not is possible. Any ideas?
