Re: [libreoffice-users] Is there any way to prevent LibreOffice BASIC to convert types automatically?

17.08.2011 16:15, Johnny Rosenberg пишет:
> I have an issue where I get error messages for type mismatch sometimes
> and sometimes not. After a lot of debugging I found the reason.
>
> The code looks like this, kind of:
>
> Public CatPoints(1 To 20) As Integer
>
>
> Sub Something
> ⁝
> Dim Points(13) As Integer
> ⁝
> Dim i As Integer
> ⁝
> For i=7 To 20
> CatPoints(i)=Iif(MaxiPlayerCategory(i),-1,Points(i-7)) ' An type
> mismatch error sometimes occurs here.
> ⁝
> Next i
> ⁝
> End Sub
>
>
> Function MaxiPlayerCategory() As Boolean
> ⁝
> End Function
>
> The MaxiPlayerCategory function works fine and returns True or False
> depending on external things, in this case it returns False, which
> means that Points(i-7) is returned by the Iif statement.
>
> So after debugging for quite a while I noticed that the Points()'
> array changes its type to double for some elements, so some of them
> remains Integer and a few of them are suddenly Double!
> Why is that? Well, because the elements of Points() are calculated
> differently depending on some stuff that is not important. Some of the
> elements are calculated by functions and some are calculated directly,
> something like Points(7)=3*something+2*somethingElse.
>
> So when something is just calculated the return value of the operation
> seems to be Double no matter what, and arrays seems to adopt to that
> automatically.
> Of course I can correct this like this:
> Points(7)=CInt(3*something+2*somethingElse).
>
> But some of my lines are long enough already and I want compact code
> if possible, so my question now is:
> Is there some way I can define/declare an array making it to refuse to
> change type of its elements? That is, something that makes the return
> value of an operation automatically converted to an Integer or that
> forces the operation to stay Integer?
>
>
> By the way, isn't it strange that
> ”Points(7)=3*something+2*somethingElse” makes Points() change the type
> of an element while
> ”CatPoints(i)=Iif(MaxiPlayerCategory(i),-1,Points(i-7))” produce an
> error message instead? Both CatPoints() and Points() are declared the
> same way, except that CatPoints() is public to all modules.
>
> I also noticed that automatic type conversion occurs when mixing
> Integers with Strings:
> Sub Main
> Dim x As Integer
> Dim y As String
>
> x=10
> y=LTrim(Str(x)) ' y="10".
> y=x ' y="10". This one is faster than the other one too.
> End Sub
>
> Haven't tried with Doubles, but I guess that works too.
> Also the other way around works:
> Sub Main
> Dim x As Integer
> Dim y As String
>
> y="10"
> x=Val(y) ' x=10.
> x=y ' x=10.
> End Sub
>
>
>
> Kind regards
>
> Johnny Rosenberg
> ジョニー・ローゼンバーグ
This code works fine in LibO3.4.2, OOo3.3.0, Go-OO3.2.1, too:

Sub main
msgbox 2 + "  " + cStr(10) ' =12
End Sub

vartype() function still gives different results for x and y in the 
examples. Maybe the types are converted automatically in some cases if 
type mismatch happens? If this happens you don't get any error messages 
and all works as if there were no errors.

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