std::regex_traits<CharT>::length
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regex_traits::length
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);.
[edit] Parameters
p
-
pointer to the first element of the null-terminated character sequence
[edit] Return value
The length of the null-terminated character string.
[edit] 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