std::io_errc

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Defined in header `<ios>`

enum class io_errc;		(since C++11)

The scoped enumeration std::io_errc defines the error codes reported by I/O streams in std::ios_base::failure exception objects. Only one error code (std::io_errc::stream) is required, although the implementation may define additional error codes. Because the appropriate specialization of std::is_error_code_enum is provided, values of type std::io_errc are implicitly convertible to std::error_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";
        if(e.code() == std::io_errc::stream)
            std::cout << "The error code is std::io_errc::stream\n";
    }
}

Output:

Caught an ios_base::failure.
The error code is std::io_errc::stream

[edit] See also


error_code (C++11)	holds a platform-dependent error code (class)

error_condition (C++11)	holds a portable error code (class)

failure	stream exception (public member class of `std::ios_base`)

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)


make_error_code(std::io_errc) (C++11)	constructs an iostream error code (function)

make_error_condition(std::io_errc) (C++11)	constructs an iostream error_condition (function)

std::io_errc

Contents

[edit] Member constants

[edit] Helper classes

[edit] Non-member functions

[edit] Example

[edit] See also


is_error_code_enum<std::io_errc> (C++11)	extends the type trait std::is_error_code_enum to identify iostream error codes (class template)


Enumeration constant	Value

`stream`	1