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perl
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5.22
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Filename :
parent.pm
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package parent; use strict; use vars qw($VERSION); $VERSION = '0.232'; sub import { my $class = shift; my $inheritor = caller(0); if ( @_ and $_[0] eq '-norequire' ) { shift @_; } else { for ( my @filename = @_ ) { if ( $_ eq $inheritor ) { warn "Class '$inheritor' tried to inherit from itself\n"; }; s{::|'}{/}g; require "$_.pm"; # dies if the file is not found } } { no strict 'refs'; push @{"$inheritor\::ISA"}, @_; }; }; "All your base are belong to us" __END__