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/C++std::system_error
| Defined in header
<system_error> | ||
|---|---|---|
class system_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 may be reported.
Inheritance diagram.
Member functions
constructs the system_error object (public member function) |
|
| returns error code (public member function) |
|
| [virtual]
| returns explanatory string (virtual 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 <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
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