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get_currentValue
method returns a
Y_CURRENTVALUE_INVALID
value, and so on. In any
case, the returned value is of the expected type and is not a null pointer which would risk crashing
your program. At worst, if you display the value without testing it, it will be outside the expected
bounds for the returned value. In the case of functions which do not normally return information, the
return value is
YAPI_SUCCESS
if everything went well, and a different error code in case of failure.
When you work without exceptions, you can obtain an error code and an error message explaining
the source of the error. You can request them from the object which returned the error, calling the
errType()
and
errMessage()
methods. Their returned values contain the same information as
in the exceptions when they are active.
10. Using Yocto-GPS with Objective-C
72
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Содержание Yocto-GPS
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