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From Andrew Pitonyak <and...@pitonyak.org>
Subject Re: [API] Priority Problem with AND and OR
Date Mon, 12 Oct 2015 19:45:16 GMT
Yes, I note this travesty in OOME. There is also a difference in the 
way that it handles exponentiation. Standard rules indicate that 2^3^4 
is evaluated as 2^(3^4) rather than (2^3)^4, wihch is what OOo does.


On 12.10.2015 15:40, Mathias Röllig wrote:
> Hello!
>
> I stumbled into a priority problem with the boolean operators AND and
> OR. I cannot find any documentation for this.
>
> First mathematical examples.
>
> With
> MsgBox( 3 * 2 ^ 2 )
> you will see, that ^ has a higher priority than *.
> (2 ^ 2) = 4
> 4 * 3 = 12
> With
> MsgBox( (3 * 2) ^ 2 )
> you will get the right result 6 ^ 2 = 36.
>
> With
> MsgBox( 3 + 4 * 3 )
> you will see, that * has a higher priority than +.
> (4 * 3) = 12
> 3 * 12 = 36
> With
> MsgBox( (3 + 4) * 3 )
> you will get the right result 7 * 3 = 21.
>
> Now looking at the same logic with logical operators.
>
> Dim bResult As Boolean
> bResult = TRUE Or FALSE And TRUE
> MsgBox( bResult )
> bResult = TRUE Or TRUE And FALSE
> MsgBox( bResult )
>
> What do you expect?
> For logical operations AND is equivalent to * and OR is equivalent to 
> +.
> AND should have a higher priority than OR, so I would expect in both
> cases (because TRUE Or (<anything>) = TRUE):
> bResult = TRUE
> But you will get
> TRUE Or FALSE And TRUE = (TRUE Or FALSE) And TRUE = TRUE
> TRUE Or TRUE And FALSE = (TRUE Or TRUE) And FALSE = FALSE
>
> Is there any explanation that AND and OR have (and should have) the
> same priority?
>
> Regards, Mathias
>
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