Method GetSourceRange

parser/parser.cc:196–201

  }

  SourceRange GetSourceRange(int64_t id) const {
    if (auto it = positions_.find(id); it != positions_.end()) {
      return it->second;
    }
    return SourceRange{};
  }

  int64_t NextId(const SourceRange& range) {
    auto id = expr_id_++;