Method Compile

extern/re2/re2/set.cc:94–122

}

bool RE2::Set::Compile() {
  if (compiled_) {
    LOG(DFATAL) << "RE2::Set::Compile() called more than once";
    return false;
  }
  compiled_ = true;
  size_ = static_cast<int>(elem_.size());

  // Sort the elements by their patterns. This is good enough for now
  // until we have a Regexp comparison function. (Maybe someday...)
  std::sort(elem_.begin(), elem_.end(),
            [](const Elem& a, const Elem& b) -> bool {
              return a.first < b.first;
            });

  PODArray<re2::Regexp*> sub(size_);
  for (int i = 0; i < size_; i++)
    sub[i] = elem_[i].second;
  elem_.clear();
  elem_.shrink_to_fit();

  Regexp::ParseFlags pf = static_cast<Regexp::ParseFlags>(
    options_.ParseFlags());
  re2::Regexp* re = re2::Regexp::Alternate(sub.data(), size_, pf);

  prog_.reset(Prog::CompileSet(re, anchor_, options_.max_mem()));
  re->Decref();
  return prog_ != nullptr;
}

bool RE2::Set::Match(const StringPiece& text, std::vector<int>* v) const {
  return Match(text, v, NULL);