Re:

Just an addition to Axel's mail
You do not need to implement the Streamer function. It is generated automatically by rootcint
(or ACLIC). For that the "+" in the LinkDef is the important point.

Rene Brun

Axel Naumann wrote:
> Hi Marc,
>
> you were unlucky enough to pick a doc format that is completely
> incompatible with ROOT's I/O. A data member commented with //! means
> "do not stream". And putting a "+" behind the class name in the
> LinkDef is sufficient:
> rootcint –f dict.x –c RootLaterDescription.h Linkdef.h
> should do.
>
> Cheers, Axel.
>
> On 2008-06-12 13:26, Marc de Kamps wrote:
>>
>>
>> Hi,
>>
>>
>>
>> I have the following problem. I have an object of type
>> RootLayerDescription. Within CINT I am able to use it. I can set
>> values of its members and write it into a file.
>>
>> If I read it back from the file in a later CINT session, however, all
>> member variables have the default values given by the constructor and
>> not the values I wanted to save.
>>
>>
>>
>> Probably I forgot something trivial, but it would be a great help to
>> know what it is.
>>
>>
>>
>> If I generate the dictionary file with:
>>
>> rootcint –f dict.x –c RootLaterDescription.h, I note that no code is
>> generated to serialize the member variables (see code below)
>>
>>
>>
>>
>>
>> One final question. If I want to use the new I/O version, my
>> understanding is that if I have a LinkDef.h file as the one attached,
>> everything is correct. Or do I have to use
>>
>> rootcint –f dict.x –c RootLaterDescription.h+
>>
>> to generate the dictionary?
>>
>>
>>
>> Thanks,
>>
>> Marc
>>
>>
>>
>> void RootLayerDescription::Streamer(TBuffer &R__b)
>>
>> {
>>
>> // Stream an object of class RootLayerDescription.
>>
>>
>>
>> UInt_t R__s, R__c;
>>
>> if (R__b.IsReading()) {
>>
>> Version_t R__v = R__b.ReadVersion(&R__s, &R__c); if (R__v) { }
>>
>> TNamed::Streamer(R__b);
>>
>> R__b.CheckByteCount(R__s, R__c, RootLayerDescription::IsA());
>>
>> } else {
>>
>> R__c = R__b.WriteVersion(RootLayerDescription::IsA(), kTRUE);
>>
>> TNamed::Streamer(R__b);
>>
>> R__b.SetByteCount(R__c, kTRUE);
>>
>> }
>>
>> }
>>
>>
>>
>>
>>
>>
>>
>> -
>>
>> Dr. Marc de Kamps
>>
>> Biosystems Group
>>
>> School of Computing
>>
>> University of Leeds
>>
>> LS29JT, Leeds , UK
>>
>>
>>
>> dekamps_at_comp.leeds.ac.uk <mailto:dekamps_at_comp.leeds.ac.uk>
>>
>> http:/www.comp.leeds.ac.uk/dekamps
>>
>>
>>
>
Received on Thu Jun 12 2008 - 15:31:04 CEST