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std::match_results::empty

STD：匹配[医]结果：空

bool empty() const;​(since C++11)

检查比赛是否成功。

参数

%280%29

返回值

size() == 0%28false如果*this表示成功匹配的结果，true否则%29。

例外

%280%29

复杂性

常量。

另见

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

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