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 ch, 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.
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
#include <string_view> 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" */) ); int main() {}
See also
|
find characters in the view
(public member function) |
|
|
find the last occurrence of a substring
(public member function) |
|
|
find first occurrence of characters
(public member function) |
|
|
find first absence of characters
(public member function) |
|
|
find last absence of characters
(public member function) |
|
|
find last occurrence of characters
(public member function of
std::basic_string<CharT,Traits,Allocator>
)
|