bpo-20186: Convert tuple object implementation to Argument Clinic. (#614)

diff --git a/Objects/clinic/tupleobject.c.h b/Objects/clinic/tupleobject.c.h
new file mode 100644
index 0000000..12f0df1
--- /dev/null
+++ b/Objects/clinic/tupleobject.c.h
@@ -0,0 +1,102 @@
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(tuple_index__doc__,
+"index($self, value, start=0, stop=sys.maxsize, /)\n"
+"--\n"
+"\n"
+"Return first index of value.\n"
+"\n"
+"Raises ValueError if the value is not present.");
+
+#define TUPLE_INDEX_METHODDEF    \
+    {"index", (PyCFunction)tuple_index, METH_FASTCALL, tuple_index__doc__},
+
+static PyObject *
+tuple_index_impl(PyTupleObject *self, PyObject *value, Py_ssize_t start,
+                 Py_ssize_t stop);
+
+static PyObject *
+tuple_index(PyTupleObject *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    PyObject *value;
+    Py_ssize_t start = 0;
+    Py_ssize_t stop = PY_SSIZE_T_MAX;
+
+    if (!_PyArg_ParseStack(args, nargs, "O|O&O&:index",
+        &value, _PyEval_SliceIndex, &start, _PyEval_SliceIndex, &stop)) {
+        goto exit;
+    }
+
+    if (!_PyArg_NoStackKeywords("index", kwnames)) {
+        goto exit;
+    }
+    return_value = tuple_index_impl(self, value, start, stop);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(tuple_count__doc__,
+"count($self, value, /)\n"
+"--\n"
+"\n"
+"Return number of occurrences of value.");
+
+#define TUPLE_COUNT_METHODDEF    \
+    {"count", (PyCFunction)tuple_count, METH_O, tuple_count__doc__},
+
+PyDoc_STRVAR(tuple_new__doc__,
+"tuple(iterable=(), /)\n"
+"--\n"
+"\n"
+"Built-in immutable sequence.\n"
+"\n"
+"If no argument is given, the constructor returns an empty tuple.\n"
+"If iterable is specified the tuple is initialized from iterable\'s items.\n"
+"\n"
+"If the argument is a tuple, the return value is the same object.");
+
+static PyObject *
+tuple_new_impl(PyTypeObject *type, PyObject *iterable);
+
+static PyObject *
+tuple_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    PyObject *iterable = NULL;
+
+    if ((type == &PyTuple_Type) &&
+        !_PyArg_NoKeywords("tuple", kwargs)) {
+        goto exit;
+    }
+    if (!PyArg_UnpackTuple(args, "tuple",
+        0, 1,
+        &iterable)) {
+        goto exit;
+    }
+    return_value = tuple_new_impl(type, iterable);
+
+exit:
+    return return_value;
+}
+
+PyDoc_STRVAR(tuple___getnewargs____doc__,
+"__getnewargs__($self, /)\n"
+"--\n"
+"\n");
+
+#define TUPLE___GETNEWARGS___METHODDEF    \
+    {"__getnewargs__", (PyCFunction)tuple___getnewargs__, METH_NOARGS, tuple___getnewargs____doc__},
+
+static PyObject *
+tuple___getnewargs___impl(PyTupleObject *self);
+
+static PyObject *
+tuple___getnewargs__(PyTupleObject *self, PyObject *Py_UNUSED(ignored))
+{
+    return tuple___getnewargs___impl(self);
+}
+/*[clinic end generated code: output=561a3654411d2225 input=a9049054013a1b77]*/