Re: [Swig-user] Code generation error

[Bob H. <bh...@co...>]

On 7/28/2011 2:07 PM, William S Fulton wrote:
> On 26/07/11 00:27, Bob Hood wrote:
>> This exhibits in 2.0.4, but I've also built and tried the trunk, and it has
>> the same problem:
>>
>>     arg1 = reinterpret_cast<  myNamespace::myStructure *>(argp1);
>>     [...]
>>     {
>>       try {
>>         result = (int)(arg1)->check(arg2);
>>       }
>>       catch(Swig::DirectorException&e) {
>>         PyErr_SetString(PyExc_RuntimeError, e.getMessage());
>>       }
>>     }
>>
>>     ... error: expected primary-expression before 'int'
>>     ... error: expected ')' before 'int'
>>
>> Visual Studio 2008 compiles this without complaining (which is wrong).  I had
>> to compile on the Mac with gcc in order to discover it.
>>
>
> How are we supposed to recreate this and help you without any source? You
> must supply some cutdown standalone code to recreate. 

Sorry.  Here's a test.i interface file:

    %module (naturalvar="1",directors="1") test

    # work around a bug in v2.0.4
    #if SWIG_VERSION == 0x020004
    %typemap(directorin) PyObject * "$input = $1_name;"
    #endif

    %include    python.swg
    %include    "TestClass.h"

Here's the TestClass.h header I used to recreate it:

    typedef void* TypeID;

    class TestClass
    {
    public:     // methods
        TestClass() {}
        virtual ~TestClass() {}

        int  check(TypeID) { return 0; }
    };

SWIG command line:

    swig -python -c++ -outdir . -o ./test.cpp -naturalvar -noproxydel -I. test.i

Here's the entire generated wrapper for the check() call that these two items
create:

    SWIGINTERN PyObject *_wrap_TestClass_check(PyObject *SWIGUNUSEDPARM(self),
PyObject *args) {
      PyObject *resultobj = 0;
      TestClass *arg1 = (TestClass *) 0 ;
      TypeID arg2 = (TypeID) 0 ;
      void *argp1 = 0 ;
      int res1 = 0 ;
      int res2 ;
      PyObject * obj0 = 0 ;
      PyObject * obj1 = 0 ;
      int result;
     
      if (!PyArg_ParseTuple(args,(char *)"OO:TestClass_check",&obj0,&obj1))
SWIG_fail;
      res1 = SWIG_ConvertPtr(obj0, &argp1,SWIGTYPE_p_TestClass, 0 |  0 );
      if (!SWIG_IsOK(res1)) {
        SWIG_exception_fail(SWIG_ArgError(res1), "in method '"
"TestClass_check" "', argument " "1"" of type '" "TestClass *""'");
      }
      arg1 = reinterpret_cast< TestClass * >(argp1);
      res2 = SWIG_ConvertPtr(obj1,SWIG_as_voidptrptr(&arg2), 0, 0);
      if (!SWIG_IsOK(res2)) {
        SWIG_exception_fail(SWIG_ArgError(res2), "in method '"
"TestClass_check" "', argument " "2"" of type '" "TypeID""'");
      }
      result = (int)(arg1)->check(arg2);
      resultobj = SWIG_From_int(static_cast< int >(result));
      return resultobj;
    fail:
      return NULL;
    }