Re: Other Globals in %once

On Sat, 1 May 2004, David Wheeler wrote:

> No, I mean that $m is available but undefined in %once blocks. If what
> Dave tells me is correct, then other globals created by allow_globals
> and set_global() are already assigned before the %once block executes,
> so ignore the "other globals" part. So yes, I'm referring to loading
> the component before the globals are defined.
>
> $m and $r are undefined in %once blocks, and I'm not sure the reasons
> for that are compelling enough. Seems to me that the Perl way is to
> allow the flexibility to use them, with the caveats well documented.
> IOW, give Masonites enough rope to shoot themselves in the foot. ;-)

Actually, I thought of a compelling reason that this won't go into the
current stable branch, at least ;)

The changes to make this work would require a bit more code surgery than
I'd like.  Specifically, we currently set the $m variable in
Request->exec.  To make it available in <%once>, we'd have to set it in
the Interp object instead, and I'm not sure where.  It could be in load(),
but then it'd get reset every time a new component is loaded, which can
happen multiple times in a request.  Also, we'd need to think about this
should work in the face of subrequests.

So while I'm not entirely opposed to this, I don't think it's something
that can go in the stable branch.

BTW, $r _is_ available, since it's set by ApacheHandler, using
$interp->set_global, much earlier.


-dave

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