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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::sentinel)

	  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 asso-
       ciated class of
	  the arguments.

       operator-(std::ranges::iota_view::iterator,
       std::ranges::iota_view::sentinel)

	  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 asso-
       ciated class of
	  the arguments.

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

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