bpo-43753: Add Py_Is() and Py_IsNone() functions (GH-25227)
Add the Py_Is(x, y) function to test if the 'x' object is the 'y'
object, the same as "x is y" in Python. Add also the Py_IsNone(),
Py_IsTrue(), Py_IsFalse() functions to test if an object is,
respectively, the None singleton, the True singleton or the False
singleton.
diff --git a/Objects/object.c b/Objects/object.c
index 1224160..4b67840 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -2279,6 +2279,33 @@ Py_XNewRef(PyObject *obj)
return _Py_XNewRef(obj);
}
+#undef Py_Is
+#undef Py_IsNone
+#undef Py_IsTrue
+#undef Py_IsFalse
+
+// Export Py_Is(), Py_IsNone(), Py_IsTrue(), Py_IsFalse() as regular functions
+// for the stable ABI.
+int Py_Is(PyObject *x, PyObject *y)
+{
+ return (x == y);
+}
+
+int Py_IsNone(PyObject *x)
+{
+ return Py_Is(x, Py_None);
+}
+
+int Py_IsTrue(PyObject *x)
+{
+ return Py_Is(x, Py_True);
+}
+
+int Py_IsFalse(PyObject *x)
+{
+ return Py_Is(x, Py_False);
+}
+
#ifdef __cplusplus
}
#endif