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

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< cpp‎ | regex‎ | match results
 
 
Regular expressions library
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(C++11)
Algorithms
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Constants
(C++11)
Regex Grammar
 
 
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)