V2 string

[Bruno Medeiros]

Derek Parnell wrote:
> On Wed, 04 Jul 2007 15:48:45 -0700, Walter Bright wrote:
> 
> The idiom I'm using is that functions that receive text have those
> parameters as 'string' to guard against the function inadvertantly
> modifying that which is passed, and functions that return text return
> 'string' to guard against calling functions inadvertantly modifying data
> that they did not create (own).
> 
> This leads to constructs like ...
> 
>    char[] result;
> 
>    result = SomeTextFunc(data).dup;
> 
> Another commonly used idiom that I had to stop using was ...
> 
>    char[] text;
>    text = getvalue();
>    if (wrongvalue(text))
>        text = ""; // Reset to an empty string
> 
> I now code ...
> 
>        text.length = 0; // Reset to an empty string
> 
> which is slightly less readable.
> 


Why is 'text.length = 0;' or 'text = text.init;' better than the idiom:
   str = "".dup;
, which also works for any kind of string, not just empty strings?

I found however, that there is a bug with that code:
http://d.puremagic.com/issues/show_bug.cgi?id=1314

-- 
Bruno Medeiros - MSc in CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D