On Mon, Nov 12, 2012 at 3:37 PM, Per Bothner <[email protected]> wrote:
> On 11/11/2012 09:54 AM, Takashi Kato wrote: > > On 11/11/2012 18:24, Arthur A. Gleckler wrote: > >> On Sun, Nov 11, 2012 at 9:06 AM, Takashi Kato <[email protected] > >> <mailto:[email protected]>> wrote: > >> > >> string/vector/bytevector-copy! procedures don't specify when start > and > >> end parameters are omitted. I think it is better to mention either > it > >> must copy somehow properly or signals an error. > >> > >> > >> Please see the notes under the table on page 7 (section 1.3.3). > > Well, still it doesn't specify which bytevector/string/vector's start > > and end. I couldn't read whether or not this is legal. > > > > (let ((bv (bytevector 1 2 3 4 5))) > > (bytevector-copy! bv 2 #u8(6 7 8 9 10)) > > bv)) > > It sort-of does, in a rather terse way: > > "Copies the elements of vector from between start and end > to vector to, starting at at." > > So start and end identifiers the elements of from, and at > identifies the index in to where they get copied to. > > Perhaps a re-phrasing might help: > > The elements of vector 'from' between 'start' and 'end' > (as defined in section 1.3.3) are copied into vector 'to', > starting at index 'at' (replacing elements from 'at' > through 'at+(end-start)'). > This is the only reasonable interpretation, but I agree that for these three cases where there are multiple sequence types it would be better to be explicit. We'll rephrase this. -- Alex
_______________________________________________ Scheme-reports mailing list [email protected] http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports
