Hi Thomas,
This will be OK for the automatic schema evolution algorithm.
The default constructor for your class is called. Your TArrayI
will be initialized to the default.
You can also write a custom Streamer (still using the automatic schema).
See examples, eg in TAxis::Streamer.
Rene Brun
On
Mon, 20
Oct 2003, Thomas Bretz wrote:
> Hi,
>
> what happens, if I have two class versions
>
> class MyClass : public TObject
> {
> ClassDef(MyClass, 1)
> }
>
> and
>
> class MyClass : public TObject
> {
> TArrayI fArray;
> ClassDef(MyClass, 2)
> }
>
> Now I'm writing objects of version 1 in my file and reading the file
> using class version 2. Is the fArray data member untouched, freed,
> cleared? I'm asking, because I use such an array as a lookup table (for
> accelerating access to another array) I could make reading 'old' files
> backward compatible, by searching the other array. But therfor I must
> know whether it is an old file or not. Can I get the information by
> checking fArray.GetSize()==0?
>
> Thanks in advance,
> Thomas.
>
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