std::match_results<BidirIt,Alloc>::empty
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
true if *this represents the result of a failed match, false otherwise, i.e. size() == 0.
Exceptions
May throw implementation-defined exceptions.
Complexity
Constant.
See also
| returns the number of matches in a fully-established result state (public member function) |
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