Re: unexpected behavior of TCut::operator!()

From: Rene Brun (Rene.Brun@cern.ch)
Date: Thu Feb 17 2000 - 09:21:05 MET 

Hi Andrei,
We are unfortunatly aware of this problem that prevents a real use
of the TCut class. The operator ! changes the cut.
If you implement the cut as intended, I will offer you
a bottle of champagne.

Rene Brun


Andrei Salnikov wrote:
> 
>   Hi all,
> 
>   I observe something which surprises me a bit:
> 
> root [166] TCut cut1 = "X>0"
> root [167] TCut cut2 = "Y<0"
> root [168] TCut cut3 = !cut1 && cut2
> root [169] cut1.Print()
> OBJ: TCut       CUT     !(X>0)
> 
>   obviosly, '!cut1' changes the value of cut1 itself. Is it supposed to
> be like that? My expectations for such constructs would be not to change
> the value of operand.
> 
>   Cheers, Andy.

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