cpp/string/basic string view/find last not of

Finds the last character not equal to any of the characters in the given character sequence. The search considers only the interval.

@1@ Finds the last character not equal to any of the characters of in this view, starting at position. @2@ Equivalent to. @3@ Equivalent to. @4@ Equivalent to.

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

Complexity
O(sizesize) at worst.