std::match_results<BidirIt,Alloc>::size
From cppreference.com
size_type size() const noexcept;
|
(since C++11) | |
Returns the number of submatches, i.e. std::distance(begin(), end()).
Returns 0 if *this does not represent the result of a successful match.
Parameters
(none)
Return value
The number of submatches.
Complexity
Constant.
Example
Run this code
#include <iostream>
#include <regex>
#include <string>
int main()
{
std::regex re("a(a)*b");
std::string target("aaab");
std::smatch sm;
std::cout << sm.size() << '\n';
std::regex_match(target, sm, re);
std::cout << sm.size() << '\n';
}
Output:
0
2
See also
| returns iterator to the beginning of the list of sub-matches (public member function) | |
| returns iterator to the end of the list of sub-matches (public member function) |