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std::match_results::ready(3) C++ Standard Libary std::match_results::ready(3) NAME std::match_results::ready - std::match_results::ready Synopsis bool ready() const; (since C++11) Indicates if the match results are ready (valid) or not. A default-constructed match result has no result state (is not ready), and can only be made ready by one of the regex algorithms. The ready state im- plies that all match results have been fully established. The result of calling most member functions of the match_results ob- ject that is not ready is undefined. Return value true if the match results are ready, false otherwise. Example // Run this code #include <iostream> #include <regex> #include <string> int main() { std::string target("pattern"); std::smatch sm; std::cout << "default constructed smatch is " << (sm.ready() ? " ready\n" : " not ready\n"); std::regex re1("tte"); std::regex_search(target, sm, re1); std::cout << "after search, smatch is " << (sm.ready() ? " ready\n" : " not ready\n"); } Output: default constructed smatch is not ready after search, smatch is ready http://cppreference.com 2022.07.31 std::match_results::ready(3)
NAME | Synopsis | Return value | Example | Output:
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