On 10/9/09, Daniel A. Steffen <das@[...].net>  wrote:
>  On Thu, Oct 8, 2009 at 14:55, Joe English <jenglish@[...].com> wrote:
>   >
>   >> This is a Call For Votes on TIP #348.
>   >>
>   >> TIP #348: Substituted 'errorStack' / 'traceback'
>   >>
>   >> Contrary to the information in the headers of the TIP (Tcl 8.7) it is my
>   >> understanding that Alexandre is asking for inclusion of this feature into
>   >>
>   >>       Tcl 8.6
>   >
>   > TIP#348: SEND IT BACK.
>   >
>   > The basic idea behind this TIP is good, but there is
>   > an IMO fatal flaw as currently specified: it introduces
>   > two new magic globals, $::tcl::errorStack and $::tcl::useErrorStack.
>   >
>   > Tcl already has too many of these (errorInfo, errorCode,
>   > tcl_precision, env, ...); this is recognized by now as
>   > having been a bad idea in all cases.
>   >
>   > I'd also suggest targeting this for 8.7.  8.6 is supposed to
>   > be in feature-freeze mode, so that it can be released.
>   > Every last-minute addition delays the release.
>   >
>   > If "SEND IT BACK" is (still) not a valid vote, then I'm
>   > sadly forced to say:
>   >
>   > TIP#348: NO.
> 
> 
>  +1 on all counts, i.e. NO for 8.6, sounds good for 8.7 if amended to
>   not introduce yet more magic variable names, e.g. use [info
>   errorstack] or something instead.

Of course I have no objection regarding the API. It is trivial to
expose it through the [info] or [interp] ensembles rather than
variables. I'm just surprised to see this as a strong showstopper,
because I seem to recall some of you saying that the ::tcl namespace
was okay for the job.

Now to proceed is:

     info errorstack -->  gives the list
     info errorstack <boolean>  --> enables/disables the feature

palatable ?

Minor variations:

    - "interp" ensemble instead of "info"
    - boolean replaced or extended by "enable/disable"

-Alex

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