Small problem is that these are package variables (not 'my'-able). Under 'use strict' U have to 'our' them. In case U want the freedom to choose between package or lexical, I use this: 

use CONSTANT;

CONSTANT my $E     => 2.73,
         my $PI    => 3.14,
         my $CREDO =>   'The dream of the slave is...to become master 
+and have slaves';

# Oops! Wrong CREDO ;)
$CREDO = 'In $$$ we trust!'; # will ERROR out ;)

# and U can:
print "I still believe that '$CREDO!'\n";

#where

package CONSTANT;
use Carp;
use Exporter;
use Tie::Scalar;
@ISA = qw(Tie::StdScalar Exporter);
@EXPORT = qw(CONSTANT);

# sub CONSTANT {my $i=0;tie $_[$i++],__PACKAGE__,$_[$i++] while $i<@_}
sub CONSTANT {tie $_[$.++],__PACKAGE__,$_[$.++] while $. < @_}
# If you want to know if something is tied somewhere ;)
# sub REF {@_ > 1 ? '' : ref tied $_[0] || ref $_[0]}
sub STORE {confess "constants are READ ONLY!"};
1;

vess

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In reply to Re^2: Perl "Constants" by vessko
in thread Perl "Constants" by zerohero

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