require '_h2ph_pre.ph';

no warnings 'redefine';

unless(defined(&_CPP_BACKWARD_SET_H)) {
    eval 'sub _CPP_BACKWARD_SET_H () {1;}' unless defined(&_CPP_BACKWARD_SET_H);
    require 'backward_warning.ph';
    require 'tree.ph';
    require 'set';
}
1;
