Need more header files with 1.3.40 than 1.3.36

[Robert Lupton]

I've pasted two small .i files at the end of this message and also  
attached them.
They use inheritance and boost::shared_ptr

If you run
    swig -python -c++ moduleLib.i

with swig 1.3.36 the wrapper contains no reference to LogFormatter,  
whereas with swig 1.3.40 it does:

static void  
*_p_boost__shared_ptrT_BriefFormatter_tTo_p_boost__shared_ptrT_LogFormatter_t
(void *x, int *newmemory) {
   *newmemory = SWIG_CAST_NEW_MEMORY;
   return (void *) new boost::shared_ptr< LogFormatter >(*
(boost::shared_ptr< BriefFormatter > *)x);
}

Note that the LogFormatter class is only referenced via an %import  
statement, not an %include.

The result is that with 1.3.40 I need to provide the C++ compiler with  
a declaration of LogFormatter to compile the swig wrapper, while with  
1.3.36 I did not.  I don't think that moduleLib needs to know about  
the class definition; a simple forward reference should suffice and  
swig could probably generate it.

                                        R

----------------- moduleLib.i ----

// -*- c++ -*-
%module moduleLib

%{
     namespace boost {
         template<typename T> struct shared_ptr {
             template<typename TT> shared_ptr(TT&) {}
         };
     }

#if 0
     class LogFormatter;
     class BriefFormatter;
#endif
%}

%import "includedModuleLib.i"

------------------- includedModuleLib.i ---

// -*- c++ -*-
%module includedModuleLib

%include "boost_shared_ptr.i"

SWIG_SHARED_PTR(LogFormatter, LogFormatter)
SWIG_SHARED_PTR_DERIVED(BriefFormatter, LogFormatter, BriefFormatter)

class LogFormatter {
};

class BriefFormatter : public LogFormatter {
};







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[wsfulton]

Robert Lupton the Good wrote:

> I've pasted two small .i files at the end of this message and also
> attached them.
> They use inheritance and boost::shared_ptr
>
> If you run
>    swig -python -c++ moduleLib.i
>
> with swig 1.3.36 the wrapper contains no reference to LogFormatter,
> whereas with swig 1.3.40 it does:
>
> static void
> *_p_boost__shared_ptrT_BriefFormatter_tTo_p_boost__shared_ptrT_LogFormatter_t(void
>
> *x, int *newmemory) {
>   *newmemory = SWIG_CAST_NEW_MEMORY;
>   return (void *) new boost::shared_ptr< LogFormatter
>  >(*(boost::shared_ptr< BriefFormatter > *)x);
> }
>

The code that is generated is identical to the above for me with both
1.3.36 and 1.3.40. So both versions need you to provide the forward
class declarations. Can you check again and if you are getting something
different, please post with suitable modifications to your .i file.

William

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