Runtime error (already posted to the main group, sorry)

Runtime error (already posted to the main group, sorry)

[jblazi]

I getting the following runtime error when my code is running:

ERROR: In procedure eval-string:
ERROR: Wrong type argument in position 1: 1050843

Here is the code. I use Cygwin on Win2K and wxWindows and the code is in a cpp 
file.

static SCM test_function(SCM n)
{
  printf("Die Zahl ist %d\n",SCM_INUM(n));
  return SCM_UNSPECIFIED;
}

bool KApp::OnInit()
{
  wxFrame *frame = new wxFrame((wxFrame*)NULL,-1,"Konstruktionsprogramm");
  widget = new MainWidget(frame);
  setupMenus();
  frame->Show(true);
  SetTopWindow(frame);
  dateiname = NULL;
  geo_init();
  scm_init_guile();
  scm_c_define_gsubr("test_function", 1, 0, 0,(SCM (*)())test_function);
  scm_eval_string((scm_unused_struct*)"(test_function 4)");
  return true;
}

Can anybody help me?

TIA,
-- 
Janos Blazi



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Re: Runtime error (already posted to the main group, sorry)

[Marius Vollmer]

jblazi <jblazi@gmx.de> writes:

>   scm_eval_string((scm_unused_struct*)"(test_function 4)");

You can not just cast a char* to a SCM.  Where did you get that idea?
(Maybe there is some misleading stuff in the manual, that's why I
ask.)

You should either use scm_c_eval_string,

    scm_c_eval_string ("(test_function 4)");

wich can work directly with C strings, or use scm_str2string to
convert the C string into a Scheme string:

    scm_c_eval_string (scm_str2string ("(test_function 4)"));

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