QByteArray data; // (this works just like std::vector<char>)
std::vector<std::any> values = ExtractData<float, char>(data); // read a float, char sequentially from data
float readFloat = std::any_cast<float>(values[0]);
float readChar = std::any_cast<char>(values[1]);

float readFloat;
char readChar;
std::tie(readFloat, readChar) = ExtractData<float, char>(data);

using anyVec = std::vector<std::any>;

// one type resolution
template<typename T>
anyVec ExtractData(const QByteArray& data, anyVec out = {}){
    // extract T value, assign to std::any, push_back into out
    return outVec;
}

// multiple types resolution
template<typename T, typename... Rest>
typename std::enable_if<(sizeof...(Rest) > 0), anyVec>::type
ExtractData(const QByteArray& data, anyVec out = {}){
    // extract T value, assign to std::any, push_back into out
    return ExtractData<Rest...>(data, out);
}