std::match_results<BidirIt,Alloc>::empty (3) - Linux Man Pages

std::match_results<BidirIt,Alloc>::empty: std::match_results<BidirIt,Alloc>::empty

NAME

std::match_results<BidirIt,Alloc>::empty - std::match_results<BidirIt,Alloc>::empty

Synopsis


bool empty() const; (since C++11)
                                   (until C++20)
[[nodiscard]] bool empty() const; (since C++20)


Checks whether the match was successful.

Parameters


(none)

Return value


size() == 0 (false if *this represents the result of a successful match, true otherwise)

Exceptions


(none)

Complexity


Constant.

See also


     returns the number of matches in a fully-established result state
size (public member function)