std::regex_traits<CharT>::length
From cppreference.com
< cpp | regex | regex traits
| static std::size_t length(const char_type* p); |
||
Calculates the length of a null-terminated character sequence, that is, the smallest i such that p[i]==0.
Standard library specializations of std::regex_traits execute std::char_traits<CharT>::length(p);
Parameters
| p | - | pointer to the first element of the null-terminated character sequence |
Return value
The length of the null-terminated character string.
Example
Run this code
#include <regex> #include <iostream> int main() { std::cout << std::regex_traits<char>::length(u8"Кошка") << '\n' << std::regex_traits<wchar_t>::length(L"Кошка") << '\n'; }
Output:
10 5