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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.

cpp/error/exception cpp/error/runtime errorstd-regex error-inheritance.svg

Inheritance diagram.

Member functions

 constructs a regex_error object
(public member function)
gets the std::regex_constants::error_type for a regex_error
(public member function)

Inherited from std::exception

Member functions

[virtual]
 destructs the exception object
(virtual public member function of std::exception)
[virtual]
 returns an explanatory string
(virtual public member function of std::exception)

Example

#include <regex>
#include <iostream>
 
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";
        }
    }
}

Output:

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

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