SWIG doesn't expand macro definition http://stackoverflow.com/questions/24402221/swig-doesnt-expand-macro-definition

foo.cpp

#include "foo.h"
_Y(void) dummy() { }

foo.h

#ifndef FOO_H
#define FOO_H

#define _X(x) x
#define _Y _X

 /* line 6 */    _Y(void) dummy();

#endif // FOO_H

int.i

%module mylib
%{
#include "foo.h"
%}

%include <windows.i>
%include "foo.h"