V2 string

[Regan Heath]

Bruno Medeiros wrote:
> It doesn't make sense to template it, because you'd still have two 
> different function versions, that would work differently. The one that 
> receives a string does a dup, the one that receives a char[] does not 
> dup. The return type of tolower(string str) might also be char[] and not 
> string, if tolower(string str) would allways does a dup, even if no 
> character modifications are necessary.

If the template is

T tolower(T)(T input) {}

then you have

string tolower(string input) {}
char[] tolower(char[] input) {}

and you cases are:

1. input string, output same string (no dup)
2. input string, output string (dup)
3. input char[], output same char[] (no dup)

Case #2 is admitedly not ideal because it may cause a later dup in your 
code.  But case #1 handles the efficient no modification case of string 
and case #3 handles both modification and non-modification without any 
call to dup.

I think the above is better than the current implementation as it avoids 
a dup in case #3.

Regan