Re: [ROOT] New Documentation on Persistence

From: Ingo Strauch (strauch@toots.physik.rwth-aachen.de)
Date: Tue May 16 2000 - 11:57:19 MEST


Hi rooters!

To me section 4.5 (Streamers and Arrays) of the persistency document is not
fully clear. Does the length of the array

class myclass {
private:
  Int_t    fN;
  Float_t *fNArray;   //[fN]

public:
  myclass (Int_t size = kDefaultSize);

  ClassDef(myclass,1)
};

have to be a fixed value (so I would declare it as a static [or even global]
constant) or can each instance of the class have a different length?

I mean, am I supposed to do code like that

myclass::myclass(Int_t size = kDefaultSize)
    : fN(size)
{
  fNArray = new Float_t[fN];
}

And if yes but I still wanted a fixed size for all objects, I would do the
following declaration?

 static const Int_t fN;


Ciao,
Ingo

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