std::regex_error

Defined in header <regex>

1	`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)
code	gets the `std::regex_constants::error_type` for a `regex_error` (public member function)

Inherited from std::exception

Member functions

(destructor) [virtual]	destructs 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 <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

Links:

http://en.cppreference.com/w/cpp/regex/regex_error

doc_CPP

2025-01-10 15:47:30

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