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=head1 NAME
base - Establish IS-A relationship with base class at compile time
=head1 SYNOPSIS
package Baz;
use base qw(Foo Bar);
=head1 DESCRIPTION
Roughly similar in effect to
BEGIN {
require Foo;
require Bar;
push @ISA, qw(Foo Bar);
}
This module was introduced with Perl 5.004_04.
=head1 BUGS
Needs proper documentation!
=cut
package base;
sub import {
my $class = shift;
foreach my $base (@_) {
unless (defined %{"$base\::"}) {
eval "require $base";
unless (defined %{"$base\::"}) {
require Carp;
Carp::croak("Base class package \"$base\" is empty.\n",
"\t(Perhaps you need to 'use' the module ",
"which defines that package first.)");
}
}
}
push @{caller(0) . '::ISA'}, @_;
}
1;
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