void LccrFeaturizer::FilterFeatureWithCount(trie_t &raw, trie_t &filtered, int cutoff) { namespace signal = boost::signals2::detail; size_t from(0), p(0); signal::auto_buffer<char, signal::store_n_bytes<LccrFeaturizer::MAXFEATLEN>> buffer(LccrFeaturizer::MAXFEATLEN, '\0'); int featcnt; for (featcnt = raw.begin(from, p); featcnt != trie_t::CEDAR_NO_PATH; featcnt = raw.next(from, p)) { if (featcnt >= cutoff) { raw.suffix(buffer.data(), p, from); int key = filtered.num_keys(); filtered.update(buffer.data(), p, 0) = key; } } }