cpp/string/basic string view/find last of

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. If the character is not present in the interval, npos will be returned.

@1@ Finds the last occurence of any of the characters of in this view, ending at position. @2@ Equivalent to. @3@ Equivalent to. @4@ Equivalent to.

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.