std::match_results<BidirIt,Alloc>::size
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
#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) |
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