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std::make_error_code(std::io_errc)

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< cpp‎ | io‎ | io errc
 
 
 
std::io_errc
Non-member functions
make_error_code(std::io_errc)
(C++11)
Helper classes
 
Defined in header <ios>
std::error_code make_error_code( std::io_errc e ) noexcept;
(since C++11)

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

This function is called by the constructor of std::error_code with an std::io_errc argument.

[edit] Parameters

e - error code number

[edit] Return value

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

[edit] Example

Run this code
#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';
}

Output:

Error code from io_errc::stream has category iostream

[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_code(io_errc) was not declared noexcept declared noexcept

[edit] See also

(C++11)
holds a platform-dependent error code
(class) [edit]
(C++11)
the IO stream error codes
(enum) [edit]
creates error code value for errc enum e
(function) [edit]
constructs a future error code
(function) [edit]
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