Difference between revisions of "cpp/io/iostream category"
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Revision as of 22:03, 31 May 2013
| Defined in header <ios>
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| const std::error_category& iostream_category(); |
(since C++11) | |
Obtains a reference to the static error category object for iostream errors. The object is required to override the virtual function error_category::name() to return a pointer to the string "iostream". It is used to identify error codes provided in the exceptions of type std::ios_base::failure.
Contents |
Parameters
(none)
Return value
A reference to the static object of unspecified runtime type, derived from std::error_category.
Exceptions
noexcept specification:
noexcept
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" << "Error category: " << e.code().category().name() << '\n'; } }
Output:
Caught an ios_base::failure. Error category: iostream
See also
| stream exception (public member class of std::ios_base)
| |
| (C++11) |
the IO stream error codes (enum) |
