std::system_error

From cppreference.com

Defined in header `<system_error>`

class system_error : public std::runtime_error;		(since C++11)

std::system_error is the type of the exception thrown by various library functions (typically the functions that interface with the OS facilities, e.g. the constructor of std::thread), when the exception has an associated std::error_code which needs to be reported.

Inherited from std::exception

Member functions


(destructor) [virtual]	destructs the exception object (virtual public member function of `std::exception`)

what [virtual]	returns explanatory string (virtual public member function of `std::exception`)

[edit] Example

#include <thread>
#include <iostream>
#include <system_error>
 
int main()
{
    try {
        std::thread().detach(); // attempt to detach a non-thread
    } catch(const std::system_error& e) {
        std::cout << "Caught system_error with code " << e.code() 
                  << " meaning " << e.what() << '\n';
    }
}

Output:

Caught system_error with code generic:22 meaning Invalid argument

Language
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)


(constructor)	constructs the system_error object (public member function)

code	returns the reported error code (public member function)

what [virtual]	returns the explanatory string (virtual public member function)

std::system_error

Contents

[edit] Member functions

Inherited from std::exception

Member functions

[edit] Example