std::system_error::system_error
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< cpp | error | system error
| system_error( std::error_code ec );
|
(1) | (since C++11) |
| system_error( std::error_code ec, const std::string& what_arg );
|
(2) | (since C++11) |
| system_error( std::error_code ec, const char* what_arg );
|
(2) | (since C++11) |
| system_error( int ev, const std::error_category& ecat );
|
(3) | (since C++11) |
| system_error( int ev, const std::error_category& ecat,
const std::string& what_arg); |
(4) | (since C++11) |
| system_error( int ev, const std::error_category& ecat,
const char* what_arg); |
(4) | (since C++11) |
Constructs new system error object.
1) Constructs with error code
ec
2) Constructs with error code
ec and explanation string what_arg. The string returned by what() is guaranteed to contain what_arg.
3) Constructs with underlying error code
ev and associated error category ecat.
4) Constructs with underlying error code
ev, associated error category ecat and explanatory string what_arg. The string returned by what() is guaranteed to contain what_arg.[edit] Parameters
| ec | - | error code |
| ev | - | error code in base encoding |
| ecat | - | the category of error |
| what_arg | - | explanatory string |
[edit] Example
Demonstrates how to create a system_error exception from a errno value
Run this code
#include <iostream> #include <system_error> int main() { try { throw std::system_error(EDOM, std::system_category()); } catch (const std::system_error& error) { std::cout << "Error: " << error.code() << " - " << error.code().message() << '\n'; } }
Output:
Error: system:33 - Numerical argument out of domain