NAME¶

std::error_code::error_code - std::error_code::error_code

Synopsis¶

error_code() noexcept; (1) (since C++11)
error_code( int ec, const error_category& ecat ) noexcept; (2) (since C++11)
template< class ErrorCodeEnum > (3) (since C++11)
error_code( ErrorCodeEnum e ) noexcept;
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.

Parameters¶

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 ADL-found overloads are
used used

See also¶

make_error_code(std::errc) creates error code value for errc enum e
(C++11) (function)
make_error_code(std::io_errc) constructs an iostream error code
(C++11) (function)
make_error_code(std::future_errc) constructs a future error code
(C++11) (function)