On Fri, 2007-06-22 at 10:52 +0400, Bulat Ziganshin wrote: > >> i tried it once and found that ByteArray# size is returned rounded to 4 - > >> there is no way in GHC runtime to alloc, say, exactly 37 bytes. and > >> don't forget to add 2 unused bytes at average > > > Right, GHC heap object are always aligned to the natural alignment of > > the architecture, be that 4 or 8 bytes.
> that i'm trying to say is that one need to store exact string size > because value returned by getSizeOfByteArray is aligned to 4 Ah yes, you're quite right. To allow GHC's ByteArray# to be used to implement a compact string type it'd have to be changed to store the length in bytes rather than words. Duncan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
