std::match_results<BidirIt,Alloc>::empty
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std::match_results
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match_results::empty
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(until C++20)
bool empty() const;
(since C++11)
Checks whether the match was successful.
[edit] Parameters
(none)
[edit] Return value
true if *this represents the result of a failed match, false otherwise, i.e. size() == 0.
[edit] Exceptions
May throw implementation-defined exceptions.
[edit] Complexity
Constant.