Re: vector vector container

From: Axel Naumann <Axel.Naumann_at_cern.ch>
Date: Thu, 8 Apr 2010 17:01:03 +0200

Hi,

Sebastien Binet wrote on 04/08/2010 04:47 PM:

> Excerpts from Feverati.Giovanni's message of 2010-04-08 16:30:34 +0200:

>> Hi
>>
>> It happens that root creates three files
>> AutoDict_vector_vector_char_allocator_char_____.cxx
>> AutoDict_vector_vector_char_allocator_char______cxx.d
>> AutoDict_vector_vector_char_allocator_char______cxx.so*
>> every time I use the following declaration in a root script
>> vector <vector <char> > aa(10);
>> followed by a double loop to fill in all the entries of the variable
>> aa.
>>
>> What is the purpose of these files? Are they specific of the operating
>> system? Is there a way to avoid their appearence?

> gInterpreter->ProcessLine(".autodict");
> 
> should disable the dictionary auto-generation.
> 
> in my experience (ie: within atlas code which is based on ROOT 5.22)
> I found it best to disable this auto generation and generate
> Reflex-dicts (+auto-loading of course) for these classes.

I agree it's better to provide the dictionaries, but we found many cases where users appreciate the automatic ones (and don't care about the details :-). And in any case the automatic dictionaries tell you which dictionaries are missing - that by itself is a benefit.

> the .cxx files should be platform independent,

No, they are actually all platform dependent.

Cheers, Axel. Received on Thu Apr 08 2010 - 17:01:02 CEST