On Wed, Dec 10, 2014 at 3:21 PM, Uri Guttman <[email protected]> wrote:
> the way to do that is to modify @_ in the calling routine and then calling
> the sub with &. in your case it would be
>
> unshift @_, 'my: ' ;
> &foo ;
>
Hadn't thought of that, or, rather, the "my:" was added later to try and
show it was my call of warn, not the system.
> but you are calling warn there which may not work that way as it is
> builtin.
>
It is, apparently different. Looked at perldoc for perlipc and
perlwarnings and tried
&warn;
&warn();
&warnings::warn();
use warnings::register;
&warnings::warnif;
all of which failed for various reasons.
> for an example of &foo being used in real world code, see the source of
> File::Slurp. the error handling code is called with & from several places.
>
the win there isn't just sharing the code but the return from the error
> handler goes back to the user's caller and not to a sub in the module.
>
Yes, that would be useful too. I must have forgot that aspect of "&" calls
;->
--
a
Andy Bach,
[email protected]
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608 261-5738 wk
