std::ios_base::failure
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                    | Defined in header  <ios> | ||
| class failure; | ||
The class std::ios_base::failure defines an exception object that is thrown on failure by the functions in the Input/Output library.
| (until C++11) | |
| (since C++11) | 
| Contents | 
[edit] Member functions
|  (constructor) | constructs the exception object (public member function) | 
std::ios_base::failure::::failure
| explicit failure( const std::string& message ); | (until C++11) | |
| explicit failure( const std::string& message,  const std::error_code& ec = std::io_errc::stream ); | (since C++11) | |
| explicit failure( const char* message, const std::error_code& ec = std::io_errc::stream ); | (since C++11) | |
Constructs the exception object using message as explanation string which can later be retrieved using what(). 
Parameters
| message | - | explanatory string | 
Inherited from std::system_error
Member functions
| returns error code (public member function of std::system_error) | |
| [virtual] | returns explanatory string (virtual public member function of std::system_error) | 
Inherited from std::runtime_error
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) | 
[edit] Example
Run this code
#include <iostream> #include <fstream> int main() { std::ifstream f("doesn't exist"); try { f.exceptions(f.failbit); } catch (const std::ios_base::failure& e) { std::cout << "Caught an ios_base::failure.\n" << "Explanatory string: " << e.what() << '\n' << "Error code: " << e.code() << '\n'; } }
Output:
Caught an ios_base::failure. Explanatory string: ios_base::clear: unspecified iostream_category error Error code: iostream:1
[edit] See also
| (C++11) | the IO stream error codes (enum) | 



