DIP9 -- Redo toString API

[Steven Schveighoffer]

On Fri, 19 Nov 2010 09:30:11 -0500, bearophile <bearophileHUGS at lycos.com>  
wrote:

> Steven Schveighoffer:
>
>> Who said setting an array to null is bad practice?  I disagree.  null  
>> is a
>> better way to represent it, because it sets both the ptr and the length  
>> to
>> 0, while "" only sets the length to 0.
>>
>> char[] arr = "";
>>
>> assert(arr == null); // passes
>> assert(arr is null); // fails
>
> I see, I didn't know this.

BTW, the default value is not part of the function signature, if you want  
to in your code use = "", as long as you do the comparison correct, it  
should be valid.

-Steve