std::basic_string::find_last_of
std::basic_string::find_last_of
size_type find_last_of( const basic_string& str, size_type pos = npos ) const; | (1) | |
size_type find_last_of( const CharT* s, size_type pos, size_type count ) const; | (2) | |
size_type find_last_of( const CharT* s, size_type pos = npos ) const; | (3) | |
size_type find_last_of( CharT ch, size_type pos = npos ) const; | (4) | |
size_type find_last_of( std::basic_string_view<CharT, Traits> sv, size_type pos = npos) const | (5) | (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.
1) Finds the last character equal to one of characters in
str
.
2) Finds the last character equal to one of characters in the first
count
characters of the character string pointed to by s
. s
can include null characters.
3) Finds the last character equal to one of characters in character string pointed to by
s
. The length of the string is determined by the first null character.
4) Finds the last character equal to
ch
.
5) Finds the last character equal to one of characters in
sv
.In all cases, equality is checked by calling Traits::eq.
Parameters
str | - | string identifying characters to search for |
pos | - | position at which the search is to finish |
count | - | length of character string identifying characters to search for |
s | - | pointer to a character string identifying characters to search for |
ch | - | character to search for |
sv | - | std::basic_string_view identifying the characters to search for |
Return value
Position of the found character or npos
if no such character is found.
Exceptions
1-4) (none) | (until C++11) |
1,4) noexcept specification: noexcept |
(since C++11) (until C++14) |
1) noexcept specification: noexcept | (since C++14) |
5) noexcept specification: noexcept | (since C++17) |
Example
#include<string> #include<iostream> int main() { const std::string path="/root/config"; auto const pos=path.find_last_of('/'); const auto leaf=path.substr(pos+1); std::cout << leaf << '\n'; }
Output:
config
See also
find characters in the string (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) |
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