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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../io/io_errc/make_error_code.html below:

std::make_error_code(std::io_errc) - cppreference.com

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 [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

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

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