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std::ranges...view::begin(3)   C++ Standard Libary  std::ranges...view::begin(3)

NAME
     std::ranges::slide_view::begin - std::ranges::slide_view::begin

Synopsis
	constexpr auto begin()
	    requires  (!(__simple_view<V>  && __slide_caches_nothing<const   (1)
     (since C++23)
	V>));
	constexpr auto begin()	const					     (2)
     (since C++23)
	    requires __slide_caches_nothing<const V>;

	Returns an iterator to the first element of the slide_view.

	1) If V models __slide_caches_first, equivalent to:

	return iterator<false>(
		   ranges::begin(base_),
		   ranges::next(ranges::begin(base_),	     n_       -       1,
     ranges::end(base_)),
		   n_
	       );

	Otherwise, equivalent to:  return  iterator<false>(ranges::begin(base_),
     n_);.
	If  V models __slide_caches_first this function caches the result within
     the
	slide_view::cached_begin_ for use on subsequent calls. This is necessary
     to provide
	the amortized constant-time complexity required by the range.
	2) Equivalent to: return iterator<true>(ranges::begin(base_), n_);.

Parameters
	(none)

Return value
	An iterator to the first element of  slide_view,  which  points  to  the
     n_-sized
	subrange  of  the  possibly const-qualified underlying view type a V for
     overload (1)
	or const V for overload (2).

Example
     // Run this code

      #include <iostream>
      #include <ranges>
      #include <string_view>
      using namespace std::literals;

      int main()
      {
	  static constexpr auto source = {"ax"sv, "ay"sv, "I<micro>"sv, "I'"sv};
	  auto view{std::ranges::slide_view(source, 2)};
	  const auto subrange{*(view.begin())};
	  for (std::string_view const s : subrange)
	      std::cout << s << ' ';
	  std::cout << '\n';
      }

Output:
      ax ay

See also
	end	   returns an iterator or a sentinel to the end
	(C++23)    (public member function)
	operator==  compares  a  sentinel  with  an   iterator	 returned   from
     slide_view::begin
	(C++23)    (function)

http://cppreference.com 	   2024.06.10	    std::ranges...view::begin(3)
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