std::regex_traits<CharT>::length
From cppreference.com
< cpp | regex | regex traits
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static
std::size_t length(
const char_type* p )
;
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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 <iostream> #include <regex> int main() { std::cout << std::regex_traits<char>::length("Кошка") << '\n' << std::regex_traits<wchar_t>::length(L"Кошка") << '\n'; }
Output:
10 5