std::make_error_code(std::io_errc)
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std::io_errc
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make_error_code(std::io_errc)
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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 |