bpo-35582: Argument Clinic: inline parsing code for positional parameters. (GH-11313)

diff --git a/Modules/clinic/_collectionsmodule.c.h b/Modules/clinic/_collectionsmodule.c.h
index 12626c1..ed3b1b5 100644
--- a/Modules/clinic/_collectionsmodule.c.h
+++ b/Modules/clinic/_collectionsmodule.c.h
@@ -16,13 +16,30 @@
         !_PyArg_NoKeywords("_tuplegetter", kwargs)) {
         goto exit;
     }
-    if (!PyArg_ParseTuple(args, "nO:_tuplegetter",
-        &index, &doc)) {
+    if (!_PyArg_CheckPositional("_tuplegetter", PyTuple_GET_SIZE(args), 2, 2)) {
         goto exit;
     }
+    if (PyFloat_Check(PyTuple_GET_ITEM(args, 0))) {
+        PyErr_SetString(PyExc_TypeError,
+                        "integer argument expected, got float" );
+        goto exit;
+    }
+    {
+        Py_ssize_t ival = -1;
+        PyObject *iobj = PyNumber_Index(PyTuple_GET_ITEM(args, 0));
+        if (iobj != NULL) {
+            ival = PyLong_AsSsize_t(iobj);
+            Py_DECREF(iobj);
+        }
+        if (ival == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        index = ival;
+    }
+    doc = PyTuple_GET_ITEM(args, 1);
     return_value = tuplegetter_new_impl(type, index, doc);
 
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=83746071eacc28d3 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=51bd572577ca7111 input=a9049054013a1b77]*/