This is the header only library to work with aggregate types and tuple-like objects (std::tuple, std::pair and std::array).

Features:

1. Get struct from tuple-like object

   struct Person {
       std::string name;
       int age;
       double weight;
   };
   
   ...
   
   std::tuple<std::string, int, double> tuple {"Peter", 10, 20};
   Person person = tutils::from_tuple<Person>(tuple);

   person will contain values Peter, 10, 20

2. Write tuple-like objects to ostream

   using tutils::operator <<;
   
   std::tuple<std::string, int, double> tuple {"Peter", 10, 20};
   std::cout << tuple;

   Output

   {"Peter", 10, 20}
   

3. Put values from istream to tuple-like object

   using tutils::operator <<;
   using tutils::operator >>;
   
   std::tuple<std::string, int> tuple;
   std::cin >> tuple;
   std::cout << tuple;

   Input

   Hello 5
   

   Output

   {"Hello", 5}
   

4. Get aggregate type fields count (since C++20)

   std::cout << tutils::aggregate_size_v<Person>;
   or
   std::cout << tutils::aggregate_size<Person>::value;

   Output

   3
   

5. For each cycle for tuple-like object elements

   using tutils::operator <<;
   
   void triple(int& n) {
        n *= 3;
   } 
   
   ...
   
   std::tuple<int, int, int> tuple {1, 2, 3};
   tutils::for_each(tuple, triple);
   std::cout << tuple;

   Output

   {3, 6, 9}
   

Put the headers utilities.hpp and aggregate_size.hpp to your project. Include the header utilities.hpp. Nothing to compile

For run tests you need to install googletest (for example from here) and put googletest folder to the tests directory.

To build tests go to the tests directory and run cmake CMakeLists.txt and then make.

Run Google_Tests_run file to start the tests

C++17 (C++20 for tutils::aggregate_size)
googletest for run tests