scan.cpp

#include <rpp/rpp.hpp>
 
#include <iostream>
 
int main()
{
    rpp::source::just(1, 2, 3)
        | rpp::operators::scan(10, std::plus<int>{})
        | rpp::operators::subscribe([](int v) { std::cout << v << std::endl; });
    // Output: 10 11 13 16
 
    rpp::source::just(1, 2, 3)
        | rpp::operators::scan(std::vector<int>{}, [](std::vector<int>&& seed, int new_value) {
              seed.push_back(new_value);
              return std::move(seed);
          })
        | rpp::operators::subscribe([](const std::vector<int>& v) {
              std::cout << "vector: ";
              for (int val : v)
                  std::cout << val << " ";
              std::cout << std::endl;
          });
    // Output: vector:
    //         vector: 1
    //         vector: 1 2
    //         vector: 1 2 3
 
    rpp::source::just(1, 2, 3)
        | rpp::operators::scan(std::plus<int>{})
        | rpp::operators::subscribe([](int v) { std::cout << v << std::endl; });
    // Output: 1 3 6
    return 0;
}