c++17 新特性要如何修改，让vs2015支持

玉生香 2022-09-22 17:33:25

//这段代码，需要怎么修改。让vs2015可以运行。
for (auto &item : data) {
if (!item.DeSerialize(this)) {
return false;
}
}

// Deserialize data.
  bool DeSerializeSize(int32_t *data);
  bool DeSerializeSkip(size_t size = 1);
  bool DeSerialize(std::string &data);
  bool DeSerialize(std::vector<char> &data);
  //bool DeSerialize(std::vector<std::string> &data);
  template <typename T>
  bool DeSerialize(T *data, size_t count = 1) {
    return FReadEndian(data, sizeof(T), count) == count;
  }

template <typename T>
  bool DeSerialize(std::vector<T> &data) {
    uint32_t size;
    if (!DeSerialize(&size)) {
      return false;
    } else if (size == 0) {
      data.clear();
    } else if (size > 50000000) {
      // Arbitrarily limit the number of elements to protect against bad data.
      return false;
    } else if  (std::is_same<T, std::string>::value) {
      // Deserialize a string.
      // TODO: optimize.
      data.resize(size);
      //for (auto &item : data) {
	  for (auto item = data.begin(); item != data.end(); item++)
	  {
        if (!DeSerialize(*item)) {
          return false;
        }
      }
    } else if  (std::is_class<T>::value) {
      // Deserialize a tesseract class.
      // TODO: optimize.
      data.resize(size);
      //这段代码，需要怎么修改。
      for (auto &item : data) {
        if (!item.DeSerialize(this)) {
          return false;
        }
      }
    } else if  (std::is_pointer<T>::value) {
      // Deserialize pointers.
      // TODO: optimize.
      data.resize(size);
      for (uint32_t i = 0; i < size; i++) {
        uint8_t non_null;
	if (!DeSerialize(&non_null)) {
          return false;
	}
        if (non_null) {
          typedef typename std::remove_pointer<T>::type ST;
		  std::remove_pointer<T>::type *item = new ST;
          if (!item->DeSerialize(item)) {
            delete item;
            return false;
          }
          data[i] = item;
        }
      }
    } else {
      // Deserialize a non-class.
      // TODO: optimize.
      data.resize(size);
      return DeSerialize(&data[0], size);
    }
    return true;
  }

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