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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../ranges/../regex/regex_error.html below:

std::regex_error - cppreference.com

class regex_error;

(since C++11)

Defines the type of exception object thrown to report errors in the regular expressions library.

Inheritance diagram

[edit] Member functions Inherited from std::exception Member functions destroys the exception object
(virtual public member function of std::exception) [edit] returns an explanatory string
(virtual public member function of std::exception) [edit] [edit] Example

Possible output:

regex_error caught: The expression contained mismatched [ and ].
The code was error_brack

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