NAME

std::regex_traits::length - std::regex_traits::length

Synopsis

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