utree eval(scope const& env) const
{
scope const* eptr = &env;
utree result;
for (std::size_t i = n; i < eptr->size(); ++i)
{
utree const& arg = (*eptr)[i];
if (arg.which() != utree_type::function_type)
result.push_back(utree(boost::ref(arg)));
else
result.push_back(arg.eval(*eptr));
}
return result;
}
