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Re^4: How to pass an argument to a Module?

by mascip (Pilgrim)
on Sep 09, 2012 at 18:25 UTC ( #992614=note: print w/replies, xml ) Need Help??


in reply to Re^3: How to pass an argument to a Module?
in thread How to pass an argument to a Module?

The author's response (i tried it and it works, with sub IMPORT) :

This is not a bug in the module.
The problem is that you specified:

sub subr :Export(:DEFAULT) { return "subr() was called\n"; }
:DEFAULT exports are only exported when the module is use'd with no arguments at all.
But then you call:
use Mod3 'argument';
with an argument, so the :DEFAULT exports don't happen.

You could fix this by specifying:

sub subr :Export(:MANDATORY) { return "subr() was called\n"; }
(assuming you always want subr() exported).
If not, then you need to specifically request subr(), like this:
use Mod3 '&subr', 'argument';
or request all the defaults, like this:
use Mod3 ':DEFAULT', 'argument';

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[Eily]: choroba but does $name = $1 solve the issue ?
[Eily]: if so, most subs start with my (VARIABLES) = @_ anyway
[moritz]: for short subs, I sometimes let them work on $_[0] directly
[Eily]: moritz but that should be fine unless you modify them

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