void* in Constructor not working in multi-argument typemap

[boaz001]

When trying to convert a Python string object to a void* and length (for a internal buffer) the typemap I've created is not used in the Constructor and I don't understand why, I think this may even be a bug?

I wish to use it in Python like this:

import example
s = "Hello World!"
example.Example(s)

But this gives:

NotImplementedError: Wrong number or type of arguments for overloaded function 'new_Example'.
  Possible C/C++ prototypes are:
    Example::Example()
    Example::Example(void *const,int const)

Is this expected behaviour? If I change the void* argument to char* the code works as expected. Note that a member-function foo in my example does use the typemap, only the constructor does not seem to like it.

Interface description:

%module example
%{
#include "example.h"
%}

%typemap(in) (void* const data, const int size)
{
  if (!PyString_Check($input))
  {
    PyErr_SetString(PyExc_ValueError, "Expecting a string");
    return NULL;
  }
  $1 = (void*)PyString_AsString($input);
  $2 = PyString_Size($input);
}

%include "example.h"

Header:

class Example
{
public:
  Example() : data_(0), size_(0) {}
  Example(void* const data, const int size)
  {
    data_ = (char*)data;
    size_ = size;
  }
  ~Example() {}

  void foo(void* const data, const int size)
  {}

private:
  char* data_;
  int size_;
};

Compile with:

swig -python -c++ -o example_wrap.cpp example.i
g++ -fPIC -c example.cpp example_wrap.cpp -I/usr/include/python2.6
g++ -shared example.o example_wrap.o -o _example.so

[wsfulton]

You are missing the typecheck typemap, see http://www.swig.org/Doc3.0/Typemaps.html#Typemaps_overloading
Add the following:

%typecheck(SWIG_TYPECHECK_STRING) (void* const data, const int size)
{
  $1 = PyString_Check($input) ? 1 : 0;
}