/usr/share/polymake/perllib/Polymake/Enum.pm is in polymake-common 3.2r2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | # Copyright (c) 1997-2018
# Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany)
# http://www.polymake.org
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#-------------------------------------------------------------------------------
package Polymake::Enum;
use integer;
use strict qw(vars subs);
use Carp;
my %named_enums;
sub import {
shift; # drop the own package name
my $cnt=0;
my $pkg=caller;
my ($cache, $prefix);
if (@_==1 && $_[0] =~ /::/) {
my $src=shift;
(my $referred_pkg=$src) =~ s/::([^:]+)$//;
$prefix=$1;
if (!defined ($cache=$named_enums{$src})) {
$referred_pkg=namespaces::lookup_class($pkg,$referred_pkg);
if (!defined($referred_pkg) || !defined ($cache=$named_enums{"$referred_pkg\::$prefix"})) {
croak "Enum: unknown enumeration type $src";
}
}
foreach (@$cache) {
*{"$pkg\::$_"}=\${"$referred_pkg\::$_"};
}
return;
}
$prefix="";
if ($_[0] =~ /:$/) {
$prefix="$`_";
$named_enums{"$pkg\::$`"}=$cache=[ ];
shift;
}
foreach (@_) {
my $name=$prefix.$_;
if ($name =~ /=/) {
$cnt=eval("package $pkg; $'");
croak "Enum:: invalid initializer: $@\n" if $@;
$name=$`;
}
croak "Enum: redefinition of \$$name\n" if defined $ {"$pkg\::$name"};
namespaces::declare_const(*{"$pkg\::$name"}, $cnt);
push @$cache, "$name" if defined $cache;
$cnt++;
}
}
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# Local Variables:
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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