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;

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 found by argument-dependent lookup.
This overload participates in overload resolution only if
std::is_error_code_enum<ErrorCodeEnum>::value is true.

Parameters¶

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

Notes¶

The ADL-found make_error_code is intended to be used in the original proposal N2422,
and used by all known implementations. However, the standard requires that only
std::make_error_code overloads are considered. This is LWG issue 3629.

See also¶

make_error_code(std::errc) constructs an std::errc error code
(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)