diff --git a/Include/cpython/funcobject.h b/Include/cpython/funcobject.h
index 99ac6008f8b611..4294fc0cdfc57e 100644
--- a/Include/cpython/funcobject.h
+++ b/Include/cpython/funcobject.h
@@ -82,22 +82,45 @@ PyAPI_FUNC(PyObject *) _PyFunction_Vectorcall(
size_t nargsf,
PyObject *kwnames);
-/* Macros for direct access to these values. Type checks are *not*
- done, so use with care. */
-#define PyFunction_GET_CODE(func) \
- (((PyFunctionObject *)func) -> func_code)
-#define PyFunction_GET_GLOBALS(func) \
- (((PyFunctionObject *)func) -> func_globals)
-#define PyFunction_GET_MODULE(func) \
- (((PyFunctionObject *)func) -> func_module)
-#define PyFunction_GET_DEFAULTS(func) \
- (((PyFunctionObject *)func) -> func_defaults)
-#define PyFunction_GET_KW_DEFAULTS(func) \
- (((PyFunctionObject *)func) -> func_kwdefaults)
-#define PyFunction_GET_CLOSURE(func) \
- (((PyFunctionObject *)func) -> func_closure)
-#define PyFunction_GET_ANNOTATIONS(func) \
- (((PyFunctionObject *)func) -> func_annotations)
+#define _PyFunction_CAST(func) \
+ (assert(PyFunction_Check(func)), _Py_CAST(PyFunctionObject*, func))
+
+/* Static inline functions for direct access to these values.
+ Type checks are *not* done, so use with care. */
+static inline PyObject* PyFunction_GET_CODE(PyObject *func) {
+ return _PyFunction_CAST(func)->func_code;
+}
+#define PyFunction_GET_CODE(func) PyFunction_GET_CODE(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_GLOBALS(PyObject *func) {
+ return _PyFunction_CAST(func)->func_globals;
+}
+#define PyFunction_GET_GLOBALS(func) PyFunction_GET_GLOBALS(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_MODULE(PyObject *func) {
+ return _PyFunction_CAST(func)->func_module;
+}
+#define PyFunction_GET_MODULE(func) PyFunction_GET_MODULE(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_DEFAULTS(PyObject *func) {
+ return _PyFunction_CAST(func)->func_defaults;
+}
+#define PyFunction_GET_DEFAULTS(func) PyFunction_GET_DEFAULTS(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_KW_DEFAULTS(PyObject *func) {
+ return _PyFunction_CAST(func)->func_kwdefaults;
+}
+#define PyFunction_GET_KW_DEFAULTS(func) PyFunction_GET_KW_DEFAULTS(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_CLOSURE(PyObject *func) {
+ return _PyFunction_CAST(func)->func_closure;
+}
+#define PyFunction_GET_CLOSURE(func) PyFunction_GET_CLOSURE(_PyObject_CAST(func))
+
+static inline PyObject* PyFunction_GET_ANNOTATIONS(PyObject *func) {
+ return _PyFunction_CAST(func)->func_annotations;
+}
+#define PyFunction_GET_ANNOTATIONS(func) PyFunction_GET_ANNOTATIONS(_PyObject_CAST(func))
/* The classmethod and staticmethod types lives here, too */
PyAPI_DATA(PyTypeObject) PyClassMethod_Type;
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