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std::basic_...ind_last_of(3) C++ Standard Libary std::basic_...ind_last_of(3) NAME std::basic_string_view::find_last_of - std::ba- sic_string_view::find_last_of Synopsis constexpr size_type find_last_of( basic_string_view v, size_type (1) (since C++17) pos = npos ) const noexcept; constexpr size_type find_last_of( CharT c, size_type pos = npos ) (2) (since C++17) const noexcept; constexpr size_type find_last_of( const CharT* s, size_type pos, (3) (since C++17) size_type count ) const; constexpr size_type find_last_of( const CharT* s, size_type pos = (4) (since C++17) npos ) const; 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. Example // Run this code #include <string_view> #include <iostream> int main() { using namespace std::literals; constexpr auto N = std::string_view::npos; static_assert( 5 == "delete"sv.find_last_of("cdef"sv) && // N == "double"sv.find_last_of("fghi"sv) && // 0 == "else"sv.find_last_of("bcde"sv, 2 /* pos [0..2]: "els" */) && // N == "explicit"sv.find_last_of("abcd"sv, 4 /* pos [0..4]: "expli" */) && // 3 == "extern"sv.find_last_of('e') && // N == "false"sv.find_last_of('x') && // 0 == "inline"sv.find_last_of('i', 2 /* pos [0..2]: "inl" */) && // N == "mutable"sv.find_last_of('a', 2 /* pos [0..2]: "mut" */) && // 3 == "namespace"sv.find_last_of("cdef", 3 /* pos [0..3]: "name" */, 3 /* "cde" */) && // N == "namespace"sv.find_last_of("cdef", 3 /* pos [0..3]: "name" */, 2 /* "cd" */) ); std::cout << "All tests passed.\n"; } Output: All tests passed. 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_first_not_of find first absence of characters (C++17) (public member function) find_last_not_of find last absence of characters (C++17) (public member function) find last occurrence of characters find_last_of (public member function of std::basic_string<CharT,Traits,Allocator>) http://cppreference.com 2022.07.31 std::basic_...ind_last_of(3)
NAME | Synopsis | Parameters | Return value | Complexity | Example | Output: | See also
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