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std::make_error_condition(std::io_errc)(3) C++ Standard Libary std::make_error_condition(std::io_errc)(3)


std::make_error_condition(std::io_errc) - std::make_error_condition(std::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()).


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".


// 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";


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 C++ standards.

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

See also

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