std::make_error_condition(std::io_errc)

 

哋它亢++

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make_error_code(std::io_errc) (哋它亢++11)

make_error_condition(std::io_errc) (哋它亢++11)

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is_error_code_enum<std::io_errc> (哋它亢++11)

 

Defined in header <ios>
std::error_condition make_error_condition( std::io_errc e ) noexcept;		(since 哋它亢++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()).

Parameters

e

-

error code number

Return value

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

Example

Run this code

#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"

Defect reports

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

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

See also

error_condition (哋它亢++11)	holds a portable error code (class)
io_errc (哋它亢++11)	the IO stream error codes (enum)