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      std::ranges::join_view<V>::begin

      From cppreference.com
      <cpp‎ |ranges‎ |join view
       
       
      Ranges library
      Range adaptors
       
       
      constexprauto begin();
      (1)(since C++20)
      constexprauto begin()const

          requiresranges::input_range<const V>&&

                   std::is_reference_v<ranges::range_reference_t<const V>>;
      (2)(since C++20)

      Returns aniterator to the first element of thejoin_view. Givenbase_ is the underlying view,

      1) Equivalent to
      2) Equivalent toreturn/*iterator*/<true>{*this,ranges::begin(base_)};.

      Contents

      [edit]Parameters

      (none)

      [edit]Return value

      Iterator to the first element.

      [edit]Notes

      Whenranges::range_reference_t<V> is not a reference type, that is, deferencing an iterator ofV returns a prvalue temporary, thejoin_view is only aninput_range, in which case only single-pass iteration is supported, and repeated calls tobegin() may not give meaningful results.

      [edit]Example

      This section is incomplete
      Reason: no example

      [edit]See also

      returns an iterator or a sentinel to the end
      (public member function)[edit]
      returns an iterator to the beginning of a range
      (customization point object)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/ranges/join_view/begin&oldid=172580"

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