tower120 / range_generate_while_view Goto Github PK

auto i0_10 =  view::generate_while(
    [i = int()](auto rewind) mutable -> optional<int>{
        if constexpr (rewind) i = -1;
        if (i == 10) return {};
        return ++i;
    });
    
for(int i : i0_100) std::cout << i << " ";
std::cout << std::endl;
for(int i : i0_100) std::cout << i << " ";