Since I have made several changes to SWIG over the years to accomodate

[wxWidgets.git] / wxPython / wxSWIG / swig_lib / python / defarg.swg

diff --git a/wxPython/wxSWIG/swig_lib/python/defarg.swg b/wxPython/wxSWIG/swig_lib/python/defarg.swg
new file mode 100644 (file)
index 0000000..83f6d55
--- /dev/null
+++ b/wxPython/wxSWIG/swig_lib/python/defarg.swg
@@ -0,0 +1,36 @@
+/* This file defines an internal function for processing default arguments
+   with shadow classes.
+
+   There seems to be no straightforward way to write a shadow functions
+   involving default arguments. For example :
+
+             def foo(arg1,arg2,*args):
+                     shadowc.foo(arg1,arg2,args)
+
+   This fails because args is now a tuple and SWIG doesn't know what to
+   do with it.
+
+   This file allows a different approach :
+
+            def foo(arg1,arg2,*args):
+                    shadowc.__call_defarg(shadowc.foo,(arg1,arg2,)+args)
+
+   Basically, we form a new tuple from the object, call this special
+   __call_defarg method and it passes control to the real wrapper function.
+   An ugly hack, but it works.
+*/
+
+static PyObject *swig_call_defargs(PyObject *self, PyObject *args) {
+       PyObject *func;
+       PyObject *parms;
+
+       if (!PyArg_ParseTuple(args,"OO",&func,&parms))
+         return NULL;
+
+       if (!PyCallable_Check(func)) {
+             PyErr_SetString(PyExc_TypeError, "__call_defarg : Need a callable object!");
+            return NULL;
+       }
+       return PyEval_CallObject(func,parms);
+
+}