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Newcomers DBPro Corner / Is it possible to return a user defined type from a function in DBP?

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Railgun
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Joined: 2nd Sep 2006
Location: Galveston Bay
Posted: 4th Sep 2006 23:49
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Can you do something like this in DBP?



Maybe I just have the syntax wrong, but I keep getting 'Both user defined type values must use the same type value' I also tried

ENDFUNCTION b AS MyType

I'm assuming you can't pass parameters by reference in DBP either?
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Daemon
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Joined: 16th Dec 2005
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Posted: 5th Sep 2006 02:44
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I believe this is what you are trying to do-


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Railgun
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Location: Galveston Bay
Posted: 5th Sep 2006 03:32
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Thanks, Daemon, but unfortunately, I would like to pass the entire structure to the function, not just one of its fields, as well as return the whole structure.

Of course, this is a way of returning multiple values from a function, and I realize DBP may not even be able to do this. I just thought it
Quote: "interesting"
I could pass a user defined type to a function just fine. It's only when I try to return one that I get the error. Of course, returning just a primitive works just fine.
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IanM
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Posted: 5th Sep 2006 23:30
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Passing a UDT value into a function works just fine, but you can't return them.

The nearest equivalent I've found is to have a global variable paired with your function.



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jinzai
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Posted: 6th Sep 2006 05:33
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So, it wasn't just me....whew! That is too bad...really. I was hoping for a way around the whole pass by reference versus pass by value gotcha without having to go global, but since you do, then I won't feel bad when I do, thanks!
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Railgun
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Location: Galveston Bay
Posted: 6th Sep 2006 17:40
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Agreed. Thanks, Ian, won't waste time on that any longer, your work around is useful. Yea, not having a way to pass by reference is unfortunate, but then again, I guess it wouldn't be a type of BASIC if that was allowed. Oh well, once I get to know the engine, I'll probably move on to the SDK anyway...
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