Re: [TCLCORE] TIP 287 [chan available] reference implementation

[Michael A. C. <mi...@cl...>]

On 10/30/06, Andreas Kupries <and...@ac...> wrote:
> Ok, I also found an older RFE by Colin McCormack
>
> http://sourceforge.net/tracker/index.php?func=detail&aid=1399062&group_id=10894&
> atid=360894
>         gets with limited line-length
>
> I think this should be discussed in the TIP

I haven't downloaded the patch attached to Colin's RFE yet to see
(will do so tonight), but with the various ways one can call [gets] (0
to 3 arguments currently) the semantics seem like they could get a bit
messy if -maxchars were supported in all flavors.

Also I think you'd want to be able to distinguish between the case
where you got -maxchars because that is exactly what was there to be
read and when you got -maxchars because you hit the maximum.  I
suppose you could distinguish the case by requesting -maxchars [expr
{$limit + 1}] and then testing [string length $line] to see if it were
just $limit or ($limit + 1) ...

Anyway, I think [chan available] is a good fit with the new [chan]
ensembles in 8.5 and approving the TIP shouldn't preclude a separate
TIP for changing [gets] in my opinion.

Michael