# std::basic_string_view<CharT,Traits>::find_last_of

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

Finds the last character equal to one of characters in the given character sequence. Exact search algorithm is not specified. The search considers only the interval [0; pos]. If the character is not present in the interval, npos will be returned.

1) Finds the last occurence of any of the characters of v in this view, ending at position pos.
2) Equivalent to find_last_of(basic_string_view(std::addressof(c), 1), pos).
3) Equivalent to find_last_of(basic_string_view(s, count), pos).
4) Equivalent to find_last_of(basic_string_view(s), pos).

### Parameters

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

### Return value

Position of the last occurrence of any character of the substring, or npos if no such character is found.

### Complexity

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