std::make_error_code(std::io_errc)

Since C++11

Header: <ios>

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

# Declarations

std::error_code make_error_code( std::io_errc e ) noexcept;

(since C++11)

# Parameters

e: error code number

# Return value

A value of type std::error_code that holds the error code number from e associated with the error category “iostream”.

# Example

#include <iostream>
#include <system_error>
 
int main()
{
    std::error_code ec = std::make_error_code(std::io_errc::stream);
 
    // This works because of the overloaded method
    //    and the is_error_code_enum specialization.
    ec = std::io_errc::stream;
 
    std::cout << "Error code from io_errc::stream has category "
              << ec.category().name() << '\n';
}

# Defect reports

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