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package ops;
our $VERSION = '1.02';
use Opcode qw(opmask_add opset invert_opset);
sub import {
shift;
# Not that unimport is the preferred form since import's don't
# accumulate well owing to the 'only ever add opmask' rule.
# E.g., perl -Mops=:set1 -Mops=:setb is unlikely to do as expected.
opmask_add(invert_opset opset(@_)) if @_;
}
sub unimport {
shift;
opmask_add(opset(@_)) if @_;
}
1;
__END__
=head1 NAME
ops - Perl pragma to restrict unsafe operations when compiling
=head1 SYNOPSIS
perl -Mops=:default ... # only allow reasonably safe operations
perl -M-ops=system ... # disable the 'system' opcode
=head1 DESCRIPTION
Since the C<ops> pragma currently has an irreversible global effect, it is
only of significant practical use with the C<-M> option on the command line.
See the L<Opcode> module for information about opcodes, optags, opmasks
and important information about safety.
=head1 SEE ALSO
L<Opcode>, L<Safe>, L<perlrun>
=cut