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std::basic_...first_not_of(3) C++ Standard Libarystd::basic_...first_not_of(3)

NAME
       std::basic_string_view::find_first_not_of	   -	      std::ba-
       sic_string_view::find_first_not_of

Synopsis
	  constexpr size_type
	  find_first_not_of( basic_string_view v, size_type pos	=  0  )	 const
       (1) (since C++17)
	  noexcept;
	  constexpr						     size_type
       (2) (since C++17)
	  find_first_not_of( CharT c, size_type	pos = 0	) const	noexcept;
	  constexpr size_type
	  find_first_not_of( const CharT* s, size_type	pos,  size_type	 count
       (3) (since C++17)
	  ) const;
	  constexpr						     size_type
       (4) (since C++17)
	  find_first_not_of( const CharT* s, size_type pos = 0 ) const;

	  Finds	the first character not	equal to any of	the characters in  the
       given character
	  sequence.

	  1) Finds the first character not equal to any	of the characters of v
       in this view,
	  starting at position pos.
	  2)  Equivalent  to  find_first_not_of(basic_string_view(std::addres-
       sof(c), 1), pos).
	  3)  Equivalent  to  find_first_not_of(basic_string_view(s,   count),
       pos).
	  4) Equivalent	to find_first_not_of(basic_string_view(s), pos).

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

Return value
	  Position  of	the first character not	equal to any of	the characters
       in the given
	  string, or npos if no	such character is found.

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

Example
       // Run this code

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

	int main()
	{
	    static_assert(2 == "BCDEF"sv.find_first_not_of("ABC"));
			    //	  ^
	    static_assert(4 == "BCDEF"sv.find_first_not_of("ABC", 4));
			    //	    ^
	    static_assert(1 == "BCDEF"sv.find_first_not_of('B'));
			    //	 ^
	    static_assert(3 == "BCDEF"sv.find_first_not_of('D',	2));
			    //	   ^
	}

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

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

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