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std::error_code:: error_code

From cppreference.net
C++
Utilities library
Diagnostics library
std::error_code
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 .

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 used ADL-found overloads are used

See also

(C++11)
creates error code value for errc enum e
(function)
(C++11)
constructs an iostream error code
(function)
(C++11)
constructs a future error code
(function)