std::ios_base::failure
From cppreference.com
| Defined in header <ios>
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| class failure; |
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The class std::ios_base::failure defines an exception object that is thrown on failure by the functions in the Input/Output library.
std::ios_base::failure may be defined either as a member class of std::ios_base or as a synonym (typedef) for another class with equivalent functionality. (since C++17)
  Inheritance diagram |
(until C++11) |
  Inheritance diagram |
(since C++11) |
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) |
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
See also
| (C++11) |
the IO stream error codes (enum) |