Talk:cpp/ranges/zip view

Stanislaw (talk) 10:22, 24 November 2022 (PST) Stanislaw

Example from : [1]

   #include <list>
   #include <array>
   #include <tuple>
   #include <ranges>
   #include <vector>
   #include <string>
   #include <iostream>
   
   void print(auto const rem, auto const& range) {
   for (std::cout << rem; auto const& elem : range)
       std::cout << elem << ' ';
   std::cout << '\n';
   }
   
   int main() {
       auto x = std::vector{1, 2, 3, 4};
       auto y = std::list<std::string>{"α", "β", "γ", "δ", "ε"};
       auto z = std::array{'A', 'B', 'C', 'D', 'E', 'F'};
   
       print("Source views:", "");
       print("x: ", x);
       print("y: ", y);
       print("z: ", z);
   
       print("\nzip(x,y,z):", "");
       for (std::tuple<int&, std::string&, char&> elem : std::views::zip(x, y, z)) {
           std::cout << std::get<0>(elem) << ' '
                   << std::get<1>(elem) << ' '
                   << std::get<2>(elem) << '\n';
   
           std::get<char&>(elem) += ('a' - 'A'); // modifies the element of z
       }
   
       print("\nAfter modification, z: ", z);
   }

Error:

   main.cpp: In function ‘int main()’:
   main.cpp:26:67: error: ‘zip’ is not a member of ‘std::views’
   26 |     for (std::tuple<int&, std::string&, char&> elem : std::views::zip(x, y, z)) {
       |                                                                   ^~~

Compiler GCC v12.1 C++23

Can somebody help with issue where is zip?

Thank's

Right, views::zip is not implemented in the online gcc-12.1. This is why we sometimes provide temporary links to Compiler Explorer, like this, so the users can check out the examples online.

Extended content
Eventually, the situation may become even better if Compiler Explorer be attached to cppreference directly, to enjoy the latest gcc/clang/msvc... versions with all the most recent features on.

--Space Mission (talk) 11:07, 24 November 2022 (PST)

re directly using Compiler Explorer - last time I asked (on cpp slack), Godbolt said anytime. Someone just has to do the magic --Cubbi (talk) 20:27, 24 November 2022 (PST)