Added 'functions' and 'functionType' to py-bindings.

contrib/py-bindings/PyGF.hsc

@@ -1,4 +1,6 @@
 {-# LANGUAGE ForeignFunctionInterface #-} 
+-- GF Python bindings                                                                                                                                        -- Jordi Saludes, upc.edu 2010
+
 module PyGF where
 
 import PGF
@@ -226,8 +228,27 @@ gf_inferexpr ppgf pexp ptype = do
     let Right (_,t) = inferExpr pgf exp
     poke ptype t
 
+
+foreign export ccall gf_functions :: Ptr PGF -> IO (Ptr ())
+gf_functions ppgf = do
+    pgf <- peek ppgf
+    listToPy pyCId $ functions pgf 
+
+foreign export ccall gf_functiontype :: Ptr PGF -> Ptr CId -> IO (Ptr Type)
+gf_functiontype ppgf pcid = do
+    pgf <- peek ppgf
+    cid <- peek pcid
+    case functionType pgf cid of
+        Just t -> do
+               ptp <- pyType
+               poke ptp t
+               return ptp
+        _      -> return nullPtr
+
+
 foreign import ccall "newLang" pyLang :: IO (Ptr Language) 
 foreign import ccall "newTree" pyTree :: IO (Ptr Tree) 
+foreign import ccall "newgfType" pyType :: IO (Ptr Type) 
 foreign import ccall "newCId" pyCId :: IO (Ptr CId) 
 foreign import ccall "newExpr" pyExpr :: IO (Ptr Expr) 
 foreign import ccall "newList" pyList :: IO (Ptr ()) 

contrib/py-bindings/gfmodule.c

@@ -32,16 +32,6 @@ NEWGF(Tree,GF_Tree,TreeType,"gf.tree","gf tree")
 
 DEALLOCFN(CId_dealloc, CId, gf_freeCId, "freeCId")
 
-/* static PyObject*
-CId_repr(CId *self)
-{
-  char* str_cid = gf_showCId(self->obj);
-  PyObject* repr = PyString_FromString(str_cid);
-  free(str_cid);
-  return repr;
-  } */
-
-
 
 /* PGF methods, constructor and destructor */
 
@@ -62,21 +52,28 @@ startCategory(PGF *self, PyObject *noarg)
   gfType *cat;
   if (!checkType(self, &PGFType)) return NULL;
   cat = (gfType*)gfTypeType.tp_new(&gfTypeType,NULL,NULL);
-  gf_startCat((PGF*)self, cat);
+  gf_startCat(self, cat);
   return cat;
 }
 
-inline static PyObject*
+/* inline static PyObject*
 categories(PGF* self)
 {
   return gf_categories(self);
 }
 
+inline static PyObject*
+functions(PGF* self)
+{
+  return gf_functions(self);
+  }
+
 inline static PyObject*
 languages(PGF* self)
 {
   return gf_languages(self);
 }
+*/
 
 static PyObject*
 languageCode(PGF *self, PyObject *args)
@@ -134,6 +131,22 @@ printName(PGF *self, PyObject *args)
 	return result;
 }
 
+static gfType*
+functiontype(PGF *self, PyObject* args)
+{
+  CId* cid;
+  gfType* gftp;
+  if (!PyArg_ParseTuple(args, "O", &cid))
+    return NULL;
+  if (!checkType(cid,&CIdType)) {
+    PyErr_Format(PyExc_TypeError, "Must be a gf identifier.");
+    return NULL;
+  }
+  // gftp = (gfType)gfTypeType.tp_new(&gfTypeType,NULL,NULL);
+  return gf_functiontype(self, cid);
+  // return gftp;
+}
+
 
 static PyObject*
 parse(PGF *self, PyObject *args, PyObject *kws)
@@ -176,17 +189,19 @@ readPGF(PyObject *self, PyObject *args)
   }
 }
 
-//Todo: repr
+
 
 static PyMethodDef pgf_methods[] = {
   {"parse", (PyCFunction)parse, METH_VARARGS|METH_KEYWORDS,"Parse a string."},
   {"lin", (PyCFunction)linearize, METH_VARARGS,"Linearize tree."},
   {"lang_code", (PyCFunction)languageCode, METH_VARARGS,"Get the language code."},
   {"print_name", (PyCFunction)printName, METH_VARARGS,"Get the print name for a id."},
+  {"fun_type", (PyCFunction)functiontype, METH_VARARGS,"Get the type of a fun expression."},
   {"startcat", (PyCFunction)startCategory, METH_NOARGS,"Get the start category."},
-  {"categories", (PyCFunction)categories, METH_NOARGS,"Get all categories."},
+  {"categories", (PyCFunction)gf_categories, METH_NOARGS,"Get all categories."},
+  {"functions", (PyCFunction)gf_functions, METH_NOARGS,"Get all functions."},
   {"abstract", (PyCFunction)abstractName, METH_NOARGS,"Get the module abstract name."},
-  {"languages", (PyCFunction)languages, METH_NOARGS,"Get the module languages."},
+  {"languages", (PyCFunction)gf_languages, METH_NOARGS,"Get the module languages."},
   {NULL, NULL, 0, NULL}  /* Sentinel */
 };
 
@@ -256,18 +271,12 @@ infer_expr(Expr *self, PyObject* args) {
   }
   gfType* gftp = (gfType*)gfTypeType.tp_new(&gfTypeType,NULL,NULL);
   gf_inferexpr(pgf, self, gftp);
-  return gftp;
+  return (PyObject*)gftp;
 }
 
 
 
-/* todo: Is Tree == Expr ?
+/* todo: Is Tree == Expr ? */
-
-static PyMethodDef tree_methods[] = {
-  {"unapply", (PyCFunction)unapp, METH_NOARGS, "Unapply a tree."},
-  {NULL, NULL, 0, NULL}  // * Sentinel * //
-};
-*/
 
 static PyMethodDef expr_methods[] = {
   {"unapply", (PyCFunction)unapp, METH_NOARGS, "Unapply an expression."},

contrib/py-bindings/test.py

@@ -72,7 +72,16 @@ class TestPgfInfo(unittest.TestCase):
 		for lang in 'QueryEng QuerySpa'.split():
 			l = gf.read_language(lang) 
 			self.assertEqual(rmprefix(l),lang)
-	
+	def test_functions(self):
+		pgf = self.pgf()
+		self.assertTrue('Even' in [`f` for f in pgf.functions()])
+	def test_function_types(self):
+		pgf = self.pgf()
+		gftypes = dict((`f`,`pgf.fun_type(f)`) for f in pgf.functions())
+		for p in "Prime : Object -> Question; Yes : Answer".split(';'):
+			lhs,rhs = [s.strip() for s in p.split(':')]
+			self.assertEqual(gftypes[lhs],rhs)
+
 class TestParsing(unittest.TestCase):
 	def setUp(self):
 		self.lexed = samples
@@ -154,5 +163,6 @@ class TestUnapplyExpr(unittest.TestCase):
 			if type(uexp) != type(2) and type(uexp) != type('2'):
 				exp = uexp[1]
 
+
 if __name__ == '__main__':
 	unittest.main()