environment set_pattern_attribute(environment const & env, name const & n) { return get_pattern_attribute().set(env, get_dummy_ios(), n, LEAN_DEFAULT_PRIORITY, true); }
silent_ios_helper(): m_out(new null_output_channel()), m_ios(get_dummy_ios(), m_out, m_out) {}
environment add_token(environment const & env, token_entry const & e, bool persistent) { return token_ext::add_entry(env, get_dummy_ios(), e, get_namespace(env), persistent); }