I've been implementing the same thing - module which consists all project contstants. Your code is good but I'd like to make small addition. I guess we should shift package name from @_ because it's passed as first parameter:
package MY::Constants;
my %constants = (
FRED => 2,
DINO => 4,
WILMA => "bb-b-b-b-uck!",
LARGE => 1e38,
);
sub import {
my $package = shift;
for (@_) {
unless (exists $constants{$_}) {
require Carp;
Carp::croak("Constant $_ invalid");
}
{
no strict 'refs';
my $full_name = caller()."::$_";
my $value = $constants{$_}; # for closure
*$full_name = sub () { $value };
}
}
}
'0 but true';
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