RE: [ROOT] Problems with typedef of STL map & vector

From: Philippe Canal (pcanal@fnal.gov)
Date: Fri Nov 05 2004 - 17:37:02 MET 

Hi,

I tried to load you example with ACLiC in 3.10/02 and I had no problem with
   dset::Dataset::Row row;
I had a different problem with
  root [2] dset::Dataset::IdList lst;
  Error: vector<string,allocator<string> >() no default constructor
FILE:(tmpfile) LINE:1
  *** Interpreter error recovered ***
This last problem would be solved by just importing the lastest CINT code in
the source of ROOT 3.10/02.

In your linkdef I would do (as ACLiC does)
  #pragma link C++ nestedclasses;
  #pragma link C++ nestedtypedefs; 
  #pragma link C++ defined_in <here i specify the location of header file
Dataset.h>

Then you can see if the typedef are correctly loaded by doing
	.typedef dset::Dataset::Name

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch [mailto:owner-roottalk@pcroot.cern.ch]
On Behalf Of vsambamu
Sent: Tuesday, November 02, 2004 10:03 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] Problems with typedef of STL map & vector

Hi,
    I am new to ROOT and had a few problems with using the STL
vector/map class. I am using ROOT 3.10. My problem is that I am not able
to access a typedef of a vector/map inside root. My classes are like
this 

**************************
// Dataset.h
#include <string>
#include <map>
#include <vector>

#ifdef __CINT__
#pragma link C++ class std::vector<std::string>;
#pragma link C++ class std::map<std::string, std::string>;
#pragma link C++ dset::Dataset::IdList;
#endif

namespace dset {
class Dataset {
public: // typedefs
                                                                        
       
  typedef std::string Name;
  typedef std::map<std::string, std::string> Row;
  typedef std::vector<std::string> IdList;

private:
  -------
  -------
};
}

**************************
// DatasetLinkDef.h - generated by makefile

#ifdef __CINT__
                                                                        
       
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link off all typedefs;
                                                                        
       
#pragma link C++ defined_in <here i specify the location of header file
Dataset.h>
#pragma link C++ nestedclasses;
#pragma link C++ nestedtypedefs;

#endif
**************************

There are several such classes and there's a Makefile which creates the
<class>LinkDef.h file automatically for each class in the package.

There is also a program which sets up the environment and loads all the
class libraries using gSystem->load() during root startup. 

When i start root, I am able to use the "dset::Dataset::Name" typdef 
For eg: 
root [0] dset::Dataset::Name name;
root [1] name = "abc";
(string 0x8d13f48)"abc"
root [2] cout << abc << endl;
abc

But when I use the other two typedefs, I get an error
1] 
root [9] dset::Dataset::IdList lst;
Error: Symbol IdListlst is not defined in current scope  FILE:(tmpfile)
LINE:1*** Interpreter error recovered ***

2]
root [10] dset::Dataset::Row row;
Error: Symbol Rowrow is not defined in current scope  FILE:(tmpfile)
LINE:1
*** Interpreter error recovered ***

Doubt: 
I saw in one of your threads (on the root mailing list) that a similar
bug was fixed in the latest version of root (v4.0). 
Is there a solution for this in the version that I am using (v3.10)? Is
there something else I need to do for these typedefs to be recognized in
root? Any comments would be very helpful.

Thank you for your time,

Regards,
Vinay Sambamurthy

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