[pygobject] Remove pyg_type_is_a() and use GType.is_a() instead

[Christoph Reiter <creiter src gnome org>]

commit f4f27e01cf199baf2f2a810a1b86a69388e43e2a
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Wed Mar 21 10:37:49 2018 +0100

    Remove pyg_type_is_a() and use GType.is_a() instead

 gi/_propertyhelper.py | 14 +++++++-------
 gi/gimodule.c         |  1 -
 gi/gobjectmodule.c    | 20 --------------------
 gi/gobjectmodule.h    |  1 -
 4 files changed, 7 insertions(+), 29 deletions(-)
---
diff --git a/gi/_propertyhelper.py b/gi/_propertyhelper.py
index e81de2ed..3fd531b5 100644
--- a/gi/_propertyhelper.py
+++ b/gi/_propertyhelper.py
@@ -308,24 +308,24 @@ class Property(object):
         elif ptype == TYPE_GTYPE:
             if default is not None:
                 raise TypeError("GType types does not have default values")
-        elif _gi.type_is_a(ptype, TYPE_ENUM):
+        elif ptype.is_a(TYPE_ENUM):
             if default is None:
                 raise TypeError("enum properties needs a default value")
-            elif not _gi.type_is_a(default, ptype):
+            elif not _gi.GType(default).is_a(ptype):
                 raise TypeError("enum value %s must be an instance of %r" %
                                 (default, ptype))
-        elif _gi.type_is_a(ptype, TYPE_FLAGS):
-            if not _gi.type_is_a(default, ptype):
+        elif ptype.is_a(TYPE_FLAGS):
+            if not _gi.GType(default).is_a(ptype):
                 raise TypeError("flags value %s must be an instance of %r" %
                                 (default, ptype))
-        elif _gi.type_is_a(ptype, TYPE_STRV) and default is not None:
+        elif ptype.is_a(TYPE_STRV) and default is not None:
             if not isinstance(default, list):
                 raise TypeError("Strv value %s must be a list" % repr(default))
             for val in default:
                 if type(val) not in (str, bytes):
                     raise TypeError("Strv value %s must contain only strings" % str(default))
-        elif _gi.type_is_a(ptype, TYPE_VARIANT) and default is not None:
-            if not hasattr(default, '__gtype__') or not _gi.type_is_a(default, TYPE_VARIANT):
+        elif ptype.is_a(TYPE_VARIANT) and default is not None:
+            if not hasattr(default, '__gtype__') or not _gi.GType(default).is_a(TYPE_VARIANT):
                 raise TypeError("variant value %s must be an instance of %r" %
                                 (default, ptype))
 
diff --git a/gi/gimodule.c b/gi/gimodule.c
index c551fffa..7a456b82 100644
--- a/gi/gimodule.c
+++ b/gi/gimodule.c
@@ -643,7 +643,6 @@ static PyMethodDef _gi_functions[] = {
       "See the reference manual for a complete reference.\n" },
     { "type_name", pyg_type_name, METH_VARARGS },
     { "type_from_name", pyg_type_from_name, METH_VARARGS },
-    { "type_is_a", pyg_type_is_a, METH_VARARGS },
     { "type_register", _wrap_pyg_type_register, METH_VARARGS },
     { "signal_new", pyg_signal_new, METH_VARARGS },
     { "list_properties",
diff --git a/gi/gobjectmodule.c b/gi/gobjectmodule.c
index 8f6f0d69..c872b33b 100644
--- a/gi/gobjectmodule.c
+++ b/gi/gobjectmodule.c
@@ -138,26 +138,6 @@ pyg_type_from_name (PyObject *self, PyObject *args)
     return NULL;
 }
 
-PyObject *
-pyg_type_is_a (PyObject *self, PyObject *args)
-{
-    PyObject *gtype, *gparent;
-    GType type, parent;
-#if 0
-    if (PyErr_Warn(PyExc_DeprecationWarning,
-                  "gobject.type_is_a is deprecated; "
-                  "use GType.is_a instead"))
-        return NULL;
-#endif
-    if (!PyArg_ParseTuple(args, "OO:gobject.type_is_a", &gtype, &gparent))
-       return NULL;
-    if ((type = pyg_type_from_object(gtype)) == 0)
-       return NULL;
-    if ((parent = pyg_type_from_object(gparent)) == 0)
-       return NULL;
-    return PyBool_FromLong(g_type_is_a(type, parent));
-}
-
 static void
 pyg_object_set_property (GObject *object, guint property_id,
                         const GValue *value, GParamSpec *pspec)
diff --git a/gi/gobjectmodule.h b/gi/gobjectmodule.h
index 13f2d942..042b6aaa 100644
--- a/gi/gobjectmodule.h
+++ b/gi/gobjectmodule.h
@@ -15,7 +15,6 @@ void        pygobject_register_warnings         (PyObject *d);
 
 PyObject *  pyg_type_name                       (PyObject *self, PyObject *args);
 PyObject *  pyg_type_from_name                  (PyObject *self, PyObject *args);
-PyObject *  pyg_type_is_a                       (PyObject *self, PyObject *args);
 PyObject *  _wrap_pyg_type_register             (PyObject *self, PyObject *args);
 PyObject *  pyg_signal_new                      (PyObject *self, PyObject *args);
 PyObject *  pyg_object_class_list_properties    (PyObject *self, PyObject *args);