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Re: Use of Carp outside of package won't compile...

by sfink (Deacon)
on Dec 20, 2007 at 05:22 UTC ( #658066=note: print w/replies, xml ) Need Help??

in reply to Use of Carp outside of package won't compile...

The scoping of 'use Carp' and 'use strict' is the same. The problem was that your code didn't use the effects of 'use Carp'. The following compiles:
use strict; use warnings; use Carp qw(croak); package Test; sub croak_test { Carp::croak "this is a test"; } Test::croak_test;
You were calling Test::croak, which doesn't exist, so the parser sees no reason to accept an unparenthesized string constant after it.

So use Carp qw(croak) must be declared after the 'package' only so that will create the function you're actually trying to call. It could go earlier, if you wish: you could insert

{ package Test; use Carp qw(croak); }
at any point before the 'package', and it would create the correct subroutine and allow you to call it without parens. Heck, you could just put sub Test::croak; at any point in the file before the call to croak and it would be happy.

(Well, if you don't define the function, it'll complain if you ever try to call Test::croak, but at least it'll compile.)

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[Mj1234]: Hello Monks, I have installed Active perl 5.16 and 5.14 but I dont find Devel::GDB package when I try to install through ppm
[Discipulus]: i'v installed ubuntu 16.04lts and i'm quite disappointed: is deadly simmilar to new win osses where you cannot find even simple things...
[Corion]: Hi Discipulus ;)
[Corion]: Mj1234: Maybe Ubuntu didn't package Devel::GDB? In that case, consider using local::lib and install the module from CPAN
[Corion]: But a quick Google search turns up this page, which seems to suggest that it should be packaged
[Discipulus]: iirc active perl has repositories only for last 2 o 3 major release of perl Mj1234. I strongly suggest portable version of strawberry perl and use cpan client to install modules
[choroba]: Also, who needs GDB when there's hdb?

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