Method ParseFromFile

src/utils/prop_tree.cc:149–162

}

bool PropTree::ParseFromFile(const std::string& file) {
  std::ifstream fin(file.c_str());
  std::string input;
  if (fin.good()) {
    std::string str;
    while (std::getline(fin, str)) {
      input.append(str + "\n");
    }
  } else {
    AddError("syntax error: input file error.");
    return false;
  }
  return ParseFromString(input);
}

bool PropTree::ParseNodeFromTokens(std::deque<Tokenizer::Token>& tokens, int depth, Node** node) {
  if (tokens.size() == 0) {