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std::basic_string_view<CharT,Traits>::find_last_not_of

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

Finds the last character not equal to any of the characters in the given character sequence. The search considers only the interval [​0​, pos].

1) Finds the last character not equal to any of the characters of v in this view, starting at position pos.
2) Equivalent to find_last_not_of(basic_string_view(std::addressof(ch), 1), pos).
3) Equivalent to find_last_not_of(basic_string_view(s, count), pos).
4) Equivalent to find_last_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 last 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

#include <string_view>
using std::operator""sv;
 
int main()
{
    static_assert(1 == "BCDEF"sv.find_last_not_of("DEF"));
                    //   ^
    static_assert(2 == "BCDEFG"sv.find_last_not_of("EFG", 3));
                    //    ^
    static_assert(2 == "ABBA"sv.find_last_not_of('A'));
                    //    ^
    static_assert(1 == "ABBA"sv.find_last_not_of('A', 1));
                    //   ^
}

See also

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

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