Re^3: Variables in a single file

...can lead to "undefined variable"-warnings

Could you provide an example? I think you're fine as long as you make sure the code has loaded/compiled before you access the variables (using use or require within a BEGIN block):

---- X.pm ----
$::foo = "foo";
$::bar = "bar";
--------------

#!/usr/bin/perl
use strict;
use warnings;
use X;   # or BEGIN { require X; }

print "$::foo\n";   # no warnings
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Re^4: Variables in a single file by LanX (Saint) on Sep 16, 2009 at 16:53 UTC
sorry, my memory was wrong one gets a `Name "main::x" used only once: possible typo at ...` warning. But putting the require into a begin block really helps. 8) `> cat mod.pm tren prog.pl tren; perl prog.pl $x="X"; 1; ------------------------ use strict; use warnings; #our $x; #BEGIN { require mod; #} print $::x; ------------------------ Name "main::x" used only once: possible typo at prog.pl line 10. X` [download] Cheers Rolf	[reply] [d/l] [select]

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Re^4: Variables in a single file
by LanX (Saint) on Sep 16, 2009 at 16:53 UTC

Name "main::x" used only once: possible typo at ... warning.

But putting the require into a begin block really helps. 8)

> cat mod.pm tren prog.pl tren; perl prog.pl
$x="X";
 
1;
------------------------
use strict;
use warnings;
 
#our $x;
#BEGIN { 
  require mod; 
#}
 
 
print $::x;
------------------------
Name "main::x" used only once: possible typo at prog.pl line 10.
X
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Cheers Rolf

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