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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@46 626c5289-ae23-0410-ae9c-e8d60b6d4f22

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);
+
+}