32 Regular expressions library [re]

32.5 Class regex_error [re.badexp]

namespace std { class regex_error : public runtime_error { public: explicit regex_error(regex_constants::error_type ecode); regex_constants::error_type code() const; }; }
The class regex_error defines the type of objects thrown as exceptions to report errors from the regular expression library.
regex_error(regex_constants::error_type ecode);
Postconditions: ecode == code().
regex_constants::error_type code() const;
Returns: The error code that was passed to the constructor.