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      std::ranges::take_view<V>::size

      From cppreference.com
      <cpp‎ |ranges‎ |take view
       
       
      Ranges library
      Range adaptors
       
       
      constexprauto size() requiresranges::sized_range<V>;
      (1)(since C++20)
      constexprauto size()const requiresranges::sized_range<const V>;
      (2)(since C++20)

      Returns the number of elements, which is the smaller of the count passed to the constructor and the size of the underlying view.

      Letbase_ be the underlying view,count_ be the underlying counter (equals to0 if default constructed). Equivalent to

      auto n=ranges::size(base_);returnranges::min(n,static_cast<decltype(n)>(count_));

      Contents

      [edit]Parameters

      (none)

      [edit]Return value

      The number of elements.

      [edit]Example

      Run this code
      #include <iostream>#include <ranges> int main(){constexprint arr[]{1,2,3}; for(int i=0; i!=6;++i){constauto tv= std::ranges::take_view{arr, i};std::cout<< tv.size()<<' ';}std::cout<<'\n';}

      Output:

      0 1 2 3 3 3

      [edit]See also

      returns an integer equal to the size of a range
      (customization point object)[edit]
      returns a signed integer equal to the size of a range
      (customization point object)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/ranges/take_view/size&oldid=173553"

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