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std::regex_error

Defined in header `<regex>`
class regex_error;		(since C++11)

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

Inheritance diagram.

Member functions

(constructor)	constructs a `regex_error` object (public member function)
operator=	replaces the `regex_error` object (public member function)
code	gets the `std::regex_constants::error_type` for a `regex_error` (public member function)

Inherited from std::runtime_error

Inherited from std::exception

Member functions

(destructor) [virtual]	destroys the exception object (virtual public member function of `std::exception`)
what [virtual]	returns an explanatory string (virtual public member function of `std::exception`)

Example

#include <iostream>
#include <regex>
 
int main()
{
    try
    {
        std::regex re("[a-b][a");
    }
    catch (const std::regex_error& e)
    {
        std::cout << "regex_error caught: " << e.what() << '\n';
        if (e.code() == std::regex_constants::error_brack)
            std::cout << "The code was error_brack\n";
    }
}

Possible output:

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

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