error_code() noexcept;
(1) (since C++11)
error_code( int ec, const error_category& ecat ) noexcept;
(2) (since C++11)
template< class ErrorCodeEnum >
error_code( ErrorCodeEnum e ) noexcept;
(3) (since C++11)
error_code( const error_code& other ) = default;
(4) (since C++11)
(implicitly declared)
error_code( error_code&& other ) = default;
(5) (since C++11)
(implicitly declared)

Constructs new error code.

1) Constructs error code with default value. Equivalent to error_code(0, std::system_category()).
2) Constructs error code with ec as the platform-dependent error code and ecat as the corresponding error category.
3) Constructs error code from an error code enum e. Equivalent to make_error_code(e), where make_error_code is only found by argument-dependent lookup. This overload participates in overload resolution only if std::is_error_code_enum<ErrorCodeEnum>::value is true.
4,5) Implicitly defined copy constructor and move constructor. Initializes the error code with the contents of the other.


other - another error code to initialize with
ec - platform dependent error code to construct with
ecat - error category corresponding to ec
e - error code enum to construct with

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 3629 C++11 only std::make_error_code overloads were used ADL-found overloads are used

See also

constructs an std::errc error code
constructs an iostream error code
constructs a future error code

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