assert(std::regex_match("X", std::regex("[^\\W]")));
assert(std::regex_match("_", std::regex("[^\\W]")));
- return 0;
+ // Those test cases are taken from PR40904
+ assert(std::regex_match("abZcd", std::regex("^ab[\\d\\D]cd")));
+ assert(std::regex_match("ab5cd", std::regex("^ab[\\d\\D]cd")));
+ assert(std::regex_match("abZcd", std::regex("^ab[\\D]cd")));
+ assert(std::regex_match("abZcd", std::regex("^ab\\Dcd")));
+ assert(std::regex_match("ab5cd", std::regex("^ab[\\d]cd")));
+ assert(std::regex_match("ab5cd", std::regex("^ab\\dcd")));
+ assert(!std::regex_match("abZcd", std::regex("^ab\\dcd")));
+ assert(!std::regex_match("ab5cd", std::regex("^ab\\Dcd")));
+
+ return 0;
}