Luna::unwrap_errcode

template <typename _Ty>
ErrCode unwrap_errcode(const R< _Ty > &obj)

Unwraps the real error code from the result.

If the error code of this result object is BasicError::error_object, this function returns the error code stored in the error object of the current thread. If the error code of this object is not BasicError::error_object, this function returns the error code as is.

Parameters

• in obj

  The original result object received from the called function.

Return value

Returns the real error code from the result.