At 5:27 PM +0000 5/21/02, "Peter Gibbs" (via RT) wrote:
> > I think I'd like these differently. STRING is a subclass of Buffer,
>> and the bufstart and buflen fields in Buffers point to the actual
>> start of memory and length of allocated data. I'd rather keep it that
>> way, and have the 'real' string length and string start be extra
>> fields in the STRING part.
>
>Quote from
>http://www.mail-archive.com/perl6-internals@perl.org/msg09497.html:
>>The COWing of substrings requires a major interface change:
>>*** All references to the data in a STRING must use the new strstart
>pointer
>>instead of bufstart ***
>
>Actually, we don't. (Sez the man catching up on altogether too much
>mail) Since we're putting the COW stuff at the tail end, substrings
>of COW strings are fine. You set the bufstart to where the substring
>starts, buflen set so it goes to the end of the original buffer, and
>the string length bit holds the real string length. That way you
>start where you need to, but you can still find the COW marker off
>the end of the original buffer.
>[End quote]
Either I was thinking of something else, or being rather stupid
there. Either way, it seems inappropriate for what you're
doing.Leaving the Buffer bits to point to the real buffered data and
leaving the string bits to do all the magic twiddly substring bits
seems more appropriate at the moment.
--
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
[EMAIL PROTECTED] have teddy bears and even
teddy bears get drunk
