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std::ranges...w::sentinel(3)   C++ Standard Libary  std::ranges...w::sentinel(3)

NAME
     std::ranges::iota_view::sentinel - std::ranges::iota_view::sentinel

Synopsis
	struct /*sentinel*/;  (since C++20)
			      (exposition only*)

	The  return  type  of iota_view::end, used when the iota_view is bounded
     (i.e. Bound is
	not std::unreachable_sentinel_t) and Bound and W are not the same type.

Member functions
     std::ranges::iota_view::sentinel::sentinel

	/*sentinel*/() = default;			(1) (since C++20)
	constexpr explicit /*sentinel*/( Bound bound ); (2) (since C++20)

	1) Value-initializes  bound_  via  its	default  member  initializer  (=
     Bound()).
	2) Initializes bound_ with bound.

Non-member functions
	In  the  following  descriptions, value_ is an underlying data member of
     iterator from
	which its operator* copies.

     operator==(std::ranges::iota_view::iterator,   std::ranges::iota_view::sen-
     tinel)

	friend	constexpr  bool  operator==(  const  /*iterator*/&  x,	  (since
     C++20)
					  const /*sentinel*/& y );

	Equivalent to: return x.value_ == y.bound_;.

	The != operator is synthesized from operator==.

	This function is  not  visible	to  ordinary  unqualified  or  qualified
     lookup, and can
	only  be  found by argument-dependent lookup when sentinel is an associ-
     ated class of
	the arguments.

     operator-(std::ranges::iota_view::iterator,    std::ranges::iota_view::sen-
     tinel)

	friend constexpr std::iter_difference_t<W>

	    operator-(const  /*iterator*/&  x, const /*sentinel*/& y) (1) (since
     C++20)

	    requires std::sized_sentinel_for<Bound, W>;
	friend constexpr std::iter_difference_t<W>

	    operator-(const /*sentinel*/& x, const /*iterator*/& y)  (2)  (since
     C++20)

	    requires std::sized_sentinel_for<Bound, W>;

	1) Equivalent to return x.value_ - y.bound_;.
	2) Equivalent to return -(y.value_ - x.bound_);.

	These  functions  are  not  visible to ordinary unqualified or qualified
     lookup, and can
	only be found by argument-dependent lookup when sentinel is  an  associ-
     ated class of
	the arguments.

http://cppreference.com 	   2024.06.10	    std::ranges...w::sentinel(3)
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