[Swig-user] pattern matching problems for member variables in a structure (typemap seems not working)

[Michael Z. <mz...@im...>]

Suppose we have a simple header file:
#include <boost/shared_ptr.hpp>
#include <iostream>
struct Foo {
    int a;
};

typedef boost::shared_ptr<Foo> RcPtr;

struct Result {
    RcPtr ptr;
};

Result getResult();
RcPtr getRcPtr();

The swig interface file is
%module test
%{
#include "test.h"
%}

%typemap(out) boost::shared_ptr<Foo> {
    std::cout << "I am here";
    $result = NULL;
}
%include "test.h"

If you look at the generated cpp file, in the function 
_wrap_Result_ptr_get, typemap defined in the swig file is successfully 
inserted into the function as the following.
  result =  ((arg1)->ptr);
  {
    std::cout << "I am here";
    resultobj = NULL;
  }
  return resultobj;

This is great. However, in the Swig interface file above, we didn't 
include shared_ptr.i, which means you can not use shared pointer.
In order to make shared pointer, we change the swig interface to :
%include "shared_ptr.i"
%module test
%{
#include "test.h"
%}

%typemap(out) boost::shared_ptr<Foo> {
    std::cout << "I am here";
    $result = NULL;
}
%include "test.h"

Ok, shared pointer is working. But, if you look at the generated cpp 
code, in the function _wrap_Result_ptr_get, the typemap seems not 
working any more.
The output is like:
  result = (RcPtr *)& ((arg1)->ptr);
  resultobj = SWIG_NewPointerObj(SWIG_as_voidptr(result), 
SWIGTYPE_p_boost__shared_ptrTFoo_t, 0 |  0 );
  return resultobj;

I find the similar behavior for other kind of membership variable in a 
structure.
 struct Result {
    std::vector<std::string> list;
};

 struct Result2 {
    std::map<std::string, std::string> amap;
};

Typemaps is defined in the swig file:
%typemap(out) std::vector<std::string> {
    // here
    $result = NULL;
}
%typemap(out) std::map<std::string, std::string> {
    // here
    $result = NULL;
}

If you do not put %include "std_string.i" in the swig file, typemaps 
works great. However, if you put %include "std_string.i" into the swig 
file, typemaps seems not working any more.

Any input is welcomed.
Thanks!