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std::make_error_condition(std::io_errc)

From cppreference.com
< cpp‎ | io‎ | io errc
Defined in header <ios>
std::error_condition make_error_condition( std::io_errc e ) noexcept;
(since C++11)

Constructs an std::error_condition object from a value of type std::io_errc as if by return std::error_condition(static_cast<int>(e), std::iostream_category()).

Contents

[edit] Parameters

e - error code number

[edit] Return value

A value of type std::error_condition that holds the error code number from e associated with the error category "iostream".

[edit] Example

#include <iostream>
#include <system_error>
 
int main()
{
    std::error_condition ec = std::make_error_condition(std::io_errc::stream);
    std::cout << "error condition for io_errc::stream has value " << ec.value()
              << "\nand message \"" << ec.message() << "\"\n";
}

Output:

error condition for io_errc::stream has value 1
and message "unspecified iostream_category error"

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2087 C++11 make_error_condition(io_errc) was not declared noexcept declared noexcept

[edit] See also

holds a portable error code
(class) [edit]
(C++11)
the IO stream error codes
(enum) [edit]