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std::basic_..._view::rfind(3) C++ Standard Libarystd::basic_..._view::rfind(3)

NAME
       std::basic_string_view::rfind - std::basic_string_view::rfind

Synopsis
	  constexpr  size_type	rfind(	basic_string_view  v,  size_type pos =
       (1) (since C++17)
	  npos ) const noexcept;
	  constexpr size_type rfind( CharT c, size_type	pos  =	npos  )	 const
       (2) (since C++17)
	  noexcept;
	  constexpr   size_type	  rfind(   const   CharT*  s,  size_type  pos,
       (3) (since C++17)
	  size_type count ) const;
	  constexpr size_type rfind( const CharT* s, size_type pos  =  npos  )
       (4) (since C++17)
	  const;

	  Finds	the last substring equal to the	given character	sequence.

	  1) Finds the last occurrence of v in this view, starting at position
       pos.
	  2)   Equivalent  to  rfind(basic_string_view(std::addressof(c),  1),
       pos).
	  3) Equivalent	to rfind(basic_string_view(s, count), pos).
	  4) Equivalent	to rfind(basic_string_view(s), pos).

Parameters
	  v	- view to search for
	  pos	- position at which to start the search
	  count	- length of substring to search	for
	  s	- pointer to a character string	to search for
	  ch	- character to search for

Return value
	  Position of the first	character of the found substring or npos if no
       such substring
	  is found.

Complexity
	  O(size() * v.size()) at worst.

Example
       // Run this code

	#include <string_view>

	int main()
	{
	    using namespace std::literals;
	    constexpr auto N = std::string_view::npos;

	    static_assert(true
		&& (6 == "AB AB	AB"sv.rfind("AB"))
		&& (6 == "AB AB	AB"sv.rfind("ABCD", N, 2))
		&& (3 == "AB AB	AB"sv.rfind("AB", 5))
		&& (2 == "B AB AB "sv.rfind("AB", 2))
		&& (N == "B AB AB "sv.rfind("AB", 1))
		&& (5 == "B AB AB "sv.rfind('A'))
		&& (4 == "AB AB	AB"sv.rfind('B', 4))
		&& (N == "AB AB	AB"sv.rfind('C'))
	    );
	}

See also
	  find		    find characters in the view
	  (C++17)	    (public member function)
	  find_first_of	    find first occurrence of characters
	  (C++17)	    (public member function)
	  find_last_of	    find last occurrence of characters
	  (C++17)	    (public member function)
	  find_first_not_of find first absence of characters
	  (C++17)	    (public member function)
	  find_last_not_of  find last absence of characters
	  (C++17)	    (public member function)
			    find the last occurrence of	a substring
	  rfind		    (public member function of
			    std::basic_string<CharT,Traits,Allocator>)

http://cppreference.com		  2022.07.31	 std::basic_..._view::rfind(3)

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