At 06:17 PM 1/3/2002 -0800, Brent Dax wrote:
>Dan Sugalski:
># At 03:37 PM 1/3/2002 -0800, Brent Dax wrote:
># While cool, I'm interested in why? For regexes you can stash
># a pointer to
># the string buffer into an S register if you want to bypass
># even one level
># of indirection.
>
>Handles would probably be used for other things besides regex info
>structures--basically, anything where you needed to stash a pointer
>somewhere without worrying about the size of INTVAL. This seemed like a
>pretty good time to introduce such a thing, since I was working on
>something where I needed to stash a pointer. They're also safer than S
>registers--you can't segfault by accidentally printing one or something.
>(Besides, I still can't wrap my brain around the idea that 'S' is for
>'structure', not 'string'. :^) )
Fair enough. Could you pop the patch to me again? The black hole ate it.
>Can you take a reference to an S register and bless the reference into
>an object? Can you store an S register into a symbol table?
Nope, but you can stash the pointer in the s register somewhere. But that's
not quite the same.
>My current
>idea for implementing /g is that you reuse the same structure; it would
>be very nice if it wasn't too hard to do such a thing.
Ah, I see. GC'll whack that, though--the thing pointed to might move.
Better to store an offset rather than a pointer.
Dan
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