gh-96002: Add functional test for Argument Clinic (#96178)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>

1 files changed, 952 insertions, 0 deletions

diff --git a/Modules/_testclinic.c b/Modules/_testclinic.c
new file mode 100644
index 0000000..c9858e9
--- /dev/null
+++ b/Modules/_testclinic.c
@@ -0,0 +1,952 @@
+#ifndef Py_BUILD_CORE_BUILTIN
+#  define Py_BUILD_CORE_MODULE 1
+#endif
+
+/* Always enable assertions */
+#undef NDEBUG
+
+#define PY_SSIZE_T_CLEAN
+
+#include "Python.h"
+
+#include "clinic/_testclinic.c.h"
+
+
+/* Pack arguments to a tuple, implicitly increase all the arguments' refcount.
+ * NULL arguments will be replaced to Py_None. */
+static PyObject *
+pack_arguments_newref(int argc, ...)
+{
+    assert(!PyErr_Occurred());
+    PyObject *tuple = PyTuple_New(argc);
+    if (!tuple) {
+        return NULL;
+    }
+
+    va_list vargs;
+    va_start(vargs, argc);
+    for (int i = 0; i < argc; i++) {
+        PyObject *arg = va_arg(vargs, PyObject *);
+        if (arg) {
+            if (_PyObject_IsFreed(arg)) {
+                PyErr_Format(PyExc_AssertionError,
+                             "argument %d at %p is freed or corrupted!",
+                             i, arg);
+                va_end(vargs);
+                Py_DECREF(tuple);
+                return NULL;
+            }
+        }
+        else {
+            arg = Py_None;
+        }
+        PyTuple_SET_ITEM(tuple, i, Py_NewRef(arg));
+    }
+    va_end(vargs);
+    return tuple;
+}
+
+/* Pack arguments to a tuple.
+ * `wrapper` is function which converts primitive type to PyObject.
+ * `arg_type` is type that arguments should be converted to before wrapped. */
+#define RETURN_PACKED_ARGS(argc, wrapper, arg_type, ...) do { \
+        assert(!PyErr_Occurred()); \
+        arg_type in[argc] = {__VA_ARGS__}; \
+        PyObject *out[argc] = {NULL,}; \
+        for (int _i = 0; _i < argc; _i++) { \
+            out[_i] = wrapper(in[_i]); \
+            assert(out[_i] || PyErr_Occurred()); \
+            if (!out[_i]) { \
+                for (int _j = 0; _j < _i; _j++) { \
+                    Py_DECREF(out[_j]); \
+                } \
+                return NULL; \
+            } \
+        } \
+        PyObject *tuple = PyTuple_New(argc); \
+        if (!tuple) { \
+            for (int _i = 0; _i < argc; _i++) { \
+                Py_DECREF(out[_i]); \
+            } \
+            return NULL; \
+        } \
+        for (int _i = 0; _i < argc; _i++) { \
+            PyTuple_SET_ITEM(tuple, _i, out[_i]); \
+        } \
+        return tuple; \
+    } while (0)
+
+
+/*[clinic input]
+module  _testclinic
+[clinic start generated code]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=d4981b80d6efdb12]*/
+
+
+/*[clinic input]
+test_empty_function
+
+[clinic start generated code]*/
+
+static PyObject *
+test_empty_function_impl(PyObject *module)
+/*[clinic end generated code: output=0f8aeb3ddced55cb input=0dd7048651ad4ae4]*/
+{
+    Py_RETURN_NONE;
+}
+
+
+/*[clinic input]
+objects_converter
+
+    a: object
+    b: object = NULL
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+objects_converter_impl(PyObject *module, PyObject *a, PyObject *b)
+/*[clinic end generated code: output=3f9c9415ec86c695 input=1533b1bd94187de4]*/
+{
+    return pack_arguments_newref(2, a, b);
+}
+
+
+/*[clinic input]
+bytes_object_converter
+
+    a: PyBytesObject
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+bytes_object_converter_impl(PyObject *module, PyBytesObject *a)
+/*[clinic end generated code: output=7732da869d74b784 input=94211751e7996236]*/
+{
+    if (!PyBytes_Check(a)) {
+        PyErr_SetString(PyExc_AssertionError,
+                        "argument a is not a PyBytesObject");
+        return NULL;
+    }
+    return pack_arguments_newref(1, a);
+}
+
+
+/*[clinic input]
+byte_array_object_converter
+
+    a: PyByteArrayObject
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+byte_array_object_converter_impl(PyObject *module, PyByteArrayObject *a)
+/*[clinic end generated code: output=51f15c76f302b1f7 input=b04d253db51c6f56]*/
+{
+    if (!PyByteArray_Check(a)) {
+        PyErr_SetString(PyExc_AssertionError,
+                        "argument a is not a PyByteArrayObject");
+        return NULL;
+    }
+    return pack_arguments_newref(1, a);
+}
+
+
+/*[clinic input]
+unicode_converter
+
+    a: unicode
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unicode_converter_impl(PyObject *module, PyObject *a)
+/*[clinic end generated code: output=1b4a4adbb6ac6e34 input=de7b5adbf07435ba]*/
+{
+    if (!PyUnicode_Check(a)) {
+        PyErr_SetString(PyExc_AssertionError,
+                        "argument a is not a unicode object");
+        return NULL;
+    }
+    return pack_arguments_newref(1, a);
+}
+
+
+/*[clinic input]
+bool_converter
+
+    a: bool = True
+    b: bool(accept={object}) = True
+    c: bool(accept={int}) = True
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+bool_converter_impl(PyObject *module, int a, int b, int c)
+/*[clinic end generated code: output=17005b0c29afd590 input=7f6537705b2f32f4]*/
+{
+    PyObject *obj_a = a ? Py_True : Py_False;
+    PyObject *obj_b = b ? Py_True : Py_False;
+    PyObject *obj_c = c ? Py_True : Py_False;
+    return pack_arguments_newref(3, obj_a, obj_b, obj_c);
+}
+
+
+/*[clinic input]
+char_converter
+
+    a: char = b'A'
+    b: char = b'\a'
+    c: char = b'\b'
+    d: char = b'\t'
+    e: char = b'\n'
+    f: char = b'\v'
+    g: char = b'\f'
+    h: char = b'\r'
+    i: char = b'"'
+    j: char = b"'"
+    k: char = b'?'
+    l: char = b'\\'
+    m: char = b'\000'
+    n: char = b'\377'
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+char_converter_impl(PyObject *module, char a, char b, char c, char d, char e,
+                    char f, char g, char h, char i, char j, char k, char l,
+                    char m, char n)
+/*[clinic end generated code: output=f929dbd2e55a9871 input=b601bc5bc7fe85e3]*/
+{
+    RETURN_PACKED_ARGS(14, PyLong_FromUnsignedLong, unsigned char,
+                       a, b, c, d, e, f, g, h, i, j, k, l, m, n);
+}
+
+
+/*[clinic input]
+unsigned_char_converter
+
+    a: unsigned_char = 12
+    b: unsigned_char(bitwise=False) = 34
+    c: unsigned_char(bitwise=True) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unsigned_char_converter_impl(PyObject *module, unsigned char a,
+                             unsigned char b, unsigned char c)
+/*[clinic end generated code: output=490af3b39ce0b199 input=e859502fbe0b3185]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromUnsignedLong, unsigned char, a, b, c);
+}
+
+
+/*[clinic input]
+short_converter
+
+    a: short = 12
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+short_converter_impl(PyObject *module, short a)
+/*[clinic end generated code: output=1ebb7ddb64248988 input=b4e2309a66f650ae]*/
+{
+    RETURN_PACKED_ARGS(1, PyLong_FromLong, long, a);
+}
+
+
+/*[clinic input]
+unsigned_short_converter
+
+    a: unsigned_short = 12
+    b: unsigned_short(bitwise=False) = 34
+    c: unsigned_short(bitwise=True) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unsigned_short_converter_impl(PyObject *module, unsigned short a,
+                              unsigned short b, unsigned short c)
+/*[clinic end generated code: output=5f92cc72fc8707a7 input=9d15cd11e741d0c6]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromUnsignedLong, unsigned long, a, b, c);
+}
+
+
+/*[clinic input]
+int_converter
+
+    a: int = 12
+    b: int(accept={int}) = 34
+    c: int(accept={str}) = 45
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+int_converter_impl(PyObject *module, int a, int b, int c)
+/*[clinic end generated code: output=8e56b59be7d0c306 input=a1dbc6344853db7a]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromLong, long, a, b, c);
+}
+
+
+/*[clinic input]
+unsigned_int_converter
+
+    a: unsigned_int = 12
+    b: unsigned_int(bitwise=False) = 34
+    c: unsigned_int(bitwise=True) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unsigned_int_converter_impl(PyObject *module, unsigned int a, unsigned int b,
+                            unsigned int c)
+/*[clinic end generated code: output=399a57a05c494cc7 input=8427ed9a3f96272d]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromUnsignedLong, unsigned long, a, b, c);
+}
+
+
+/*[clinic input]
+long_converter
+
+    a: long = 12
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+long_converter_impl(PyObject *module, long a)
+/*[clinic end generated code: output=9663d936a652707a input=84ad0ef28f24bd85]*/
+{
+    RETURN_PACKED_ARGS(1, PyLong_FromLong, long, a);
+}
+
+
+/*[clinic input]
+unsigned_long_converter
+
+    a: unsigned_long = 12
+    b: unsigned_long(bitwise=False) = 34
+    c: unsigned_long(bitwise=True) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unsigned_long_converter_impl(PyObject *module, unsigned long a,
+                             unsigned long b, unsigned long c)
+/*[clinic end generated code: output=120b82ea9ebd93a8 input=440dd6f1817f5d91]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromUnsignedLong, unsigned long, a, b, c);
+}
+
+
+/*[clinic input]
+long_long_converter
+
+    a: long_long = 12
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+long_long_converter_impl(PyObject *module, long long a)
+/*[clinic end generated code: output=5fb5f2220770c3e1 input=730fcb3eecf4d993]*/
+{
+    RETURN_PACKED_ARGS(1, PyLong_FromLongLong, long long, a);
+}
+
+
+/*[clinic input]
+unsigned_long_long_converter
+
+    a: unsigned_long_long = 12
+    b: unsigned_long_long(bitwise=False) = 34
+    c: unsigned_long_long(bitwise=True) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+unsigned_long_long_converter_impl(PyObject *module, unsigned long long a,
+                                  unsigned long long b, unsigned long long c)
+/*[clinic end generated code: output=65b7273e63501762 input=300737b0bdb230e9]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromUnsignedLongLong, unsigned long long,
+                       a, b, c);
+}
+
+
+/*[clinic input]
+py_ssize_t_converter
+
+    a: Py_ssize_t = 12
+    b: Py_ssize_t(accept={int}) = 34
+    c: Py_ssize_t(accept={int, NoneType}) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+py_ssize_t_converter_impl(PyObject *module, Py_ssize_t a, Py_ssize_t b,
+                          Py_ssize_t c)
+/*[clinic end generated code: output=ce252143e0ed0372 input=76d0f342e9317a1f]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromSsize_t, Py_ssize_t, a, b, c);
+}
+
+
+/*[clinic input]
+slice_index_converter
+
+    a: slice_index = 12
+    b: slice_index(accept={int}) = 34
+    c: slice_index(accept={int, NoneType}) = 56
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+slice_index_converter_impl(PyObject *module, Py_ssize_t a, Py_ssize_t b,
+                           Py_ssize_t c)
+/*[clinic end generated code: output=923c6cac77666a6b input=64f99f3f83265e47]*/
+{
+    RETURN_PACKED_ARGS(3, PyLong_FromSsize_t, Py_ssize_t, a, b, c);
+}
+
+
+/*[clinic input]
+size_t_converter
+
+    a: size_t = 12
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+size_t_converter_impl(PyObject *module, size_t a)
+/*[clinic end generated code: output=412b5b7334ab444d input=83ae7d9171fbf208]*/
+{
+    RETURN_PACKED_ARGS(1, PyLong_FromSize_t, size_t, a);
+}
+
+
+/*[clinic input]
+float_converter
+
+    a: float = 12.5
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+float_converter_impl(PyObject *module, float a)
+/*[clinic end generated code: output=1c98f64f2cf1d55c input=a625b59ad68047d8]*/
+{
+    RETURN_PACKED_ARGS(1, PyFloat_FromDouble, double, a);
+}
+
+
+/*[clinic input]
+double_converter
+
+    a: double = 12.5
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+double_converter_impl(PyObject *module, double a)
+/*[clinic end generated code: output=a4e8532d284d035d input=098df188f24e7c62]*/
+{
+    RETURN_PACKED_ARGS(1, PyFloat_FromDouble, double, a);
+}
+
+
+/*[clinic input]
+py_complex_converter
+
+    a: Py_complex
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+py_complex_converter_impl(PyObject *module, Py_complex a)
+/*[clinic end generated code: output=9e6ca2eb53b14846 input=e9148a8ca1dbf195]*/
+{
+    RETURN_PACKED_ARGS(1, PyComplex_FromCComplex, Py_complex, a);
+}
+
+
+/*[clinic input]
+str_converter
+
+    a: str = "a"
+    b: str(accept={robuffer}) = "b"
+    c: str(accept={robuffer, str}, zeroes=True) = "c"
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+str_converter_impl(PyObject *module, const char *a, const char *b,
+                   const char *c, Py_ssize_t c_length)
+/*[clinic end generated code: output=475bea40548c8cd6 input=bff2656c92ee25de]*/
+{
+    assert(!PyErr_Occurred());
+    PyObject *out[3] = {NULL,};
+    int i = 0;
+    PyObject *arg;
+
+    arg = PyUnicode_FromString(a);
+    assert(arg || PyErr_Occurred());
+    if (!arg) {
+        goto error;
+    }
+    out[i++] = arg;
+
+    arg = PyUnicode_FromString(b);
+    assert(arg || PyErr_Occurred());
+    if (!arg) {
+        goto error;
+    }
+    out[i++] = arg;
+
+    arg = PyUnicode_FromStringAndSize(c, c_length);
+    assert(arg || PyErr_Occurred());
+    if (!arg) {
+        goto error;
+    }
+    out[i++] = arg;
+
+    PyObject *tuple = PyTuple_New(3);
+    if (!tuple) {
+        goto error;
+    }
+    for (int j = 0; j < 3; j++) {
+        PyTuple_SET_ITEM(tuple, j, out[j]);
+    }
+    return tuple;
+
+error:
+    for (int j = 0; j < i; j++) {
+        Py_DECREF(out[j]);
+    }
+    return NULL;
+}
+
+
+static PyObject *
+bytes_from_buffer(Py_buffer *buf)
+{
+    PyObject *bytes_obj = PyBytes_FromStringAndSize(NULL, buf->len);
+    if (!bytes_obj) {
+        return NULL;
+    }
+    void *bytes_obj_buf = ((PyBytesObject *)bytes_obj)->ob_sval;
+    if (PyBuffer_ToContiguous(bytes_obj_buf, buf, buf->len, 'C') < 0) {
+        Py_DECREF(bytes_obj);
+        return NULL;
+    }
+    return bytes_obj;
+}
+
+/*[clinic input]
+py_buffer_converter
+
+    a: Py_buffer(accept={str, buffer, NoneType})
+    b: Py_buffer(accept={rwbuffer})
+    /
+
+[clinic start generated code]*/
+
+static PyObject *
+py_buffer_converter_impl(PyObject *module, Py_buffer *a, Py_buffer *b)
+/*[clinic end generated code: output=52fb13311e3d6d03 input=775de727de5c7421]*/
+{
+    RETURN_PACKED_ARGS(2, bytes_from_buffer, Py_buffer *, a, b);
+}
+
+
+/*[clinic input]
+keywords
+
+    a: object
+    b: object
+
+[clinic start generated code]*/
+
+static PyObject *
+keywords_impl(PyObject *module, PyObject *a, PyObject *b)
+/*[clinic end generated code: output=850aaed53e26729e input=f44b89e718c1a93b]*/
+{
+    return pack_arguments_newref(2, a, b);
+}
+
+
+/*[clinic input]
+keywords_kwonly
+
+    a: object
+    *
+    b: object
+
+[clinic start generated code]*/
+
+static PyObject *
+keywords_kwonly_impl(PyObject *module, PyObject *a, PyObject *b)
+/*[clinic end generated code: output=a45c48241da584dc input=1f08e39c3312b015]*/
+{
+    return pack_arguments_newref(2, a, b);
+}
+
+
+/*[clinic input]
+keywords_opt
+
+    a: object
+    b: object = None
+    c: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+keywords_opt_impl(PyObject *module, PyObject *a, PyObject *b, PyObject *c)
+/*[clinic end generated code: output=25e4b67d91c76a66 input=b0ba0e4f04904556]*/
+{
+    return pack_arguments_newref(3, a, b, c);
+}
+
+
+/*[clinic input]
+keywords_opt_kwonly
+
+    a: object
+    b: object = None
+    *
+    c: object = None
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+keywords_opt_kwonly_impl(PyObject *module, PyObject *a, PyObject *b,
+                         PyObject *c, PyObject *d)
+/*[clinic end generated code: output=6aa5b655a6e9aeb0 input=f79da689d6c51076]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+keywords_kwonly_opt
+
+    a: object
+    *
+    b: object = None
+    c: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+keywords_kwonly_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                         PyObject *c)
+/*[clinic end generated code: output=707f78eb0f55c2b1 input=e0fa1a0e46dca791]*/
+{
+    return pack_arguments_newref(3, a, b, c);
+}
+
+
+/*[clinic input]
+posonly_keywords
+
+    a: object
+    /
+    b: object
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_keywords_impl(PyObject *module, PyObject *a, PyObject *b)
+/*[clinic end generated code: output=6ac88f4a5f0bfc8d input=fde0a2f79fe82b06]*/
+{
+    return pack_arguments_newref(2, a, b);
+}
+
+
+/*[clinic input]
+posonly_kwonly
+
+    a: object
+    /
+    *
+    b: object
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_kwonly_impl(PyObject *module, PyObject *a, PyObject *b)
+/*[clinic end generated code: output=483e6790d3482185 input=78b3712768da9a19]*/
+{
+    return pack_arguments_newref(2, a, b);
+}
+
+
+/*[clinic input]
+posonly_keywords_kwonly
+
+    a: object
+    /
+    b: object
+    *
+    c: object
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_keywords_kwonly_impl(PyObject *module, PyObject *a, PyObject *b,
+                             PyObject *c)
+/*[clinic end generated code: output=2fae573e8cc3fad8 input=a1ad5d2295eb803c]*/
+{
+    return pack_arguments_newref(3, a, b, c);
+}
+
+
+/*[clinic input]
+posonly_keywords_opt
+
+    a: object
+    /
+    b: object
+    c: object = None
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_keywords_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                          PyObject *c, PyObject *d)
+/*[clinic end generated code: output=f5eb66241bcf68fb input=51c10de2a120e279]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+posonly_opt_keywords_opt
+
+    a: object
+    b: object = None
+    /
+    c: object = None
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_opt_keywords_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                              PyObject *c, PyObject *d)
+/*[clinic end generated code: output=d54a30e549296ffd input=f408a1de7dfaf31f]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+posonly_kwonly_opt
+
+    a: object
+    /
+    *
+    b: object
+    c: object = None
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_kwonly_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                        PyObject *c, PyObject *d)
+/*[clinic end generated code: output=a20503fe36b4fd62 input=3494253975272f52]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+posonly_opt_kwonly_opt
+
+    a: object
+    b: object = None
+    /
+    *
+    c: object = None
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_opt_kwonly_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                            PyObject *c, PyObject *d)
+/*[clinic end generated code: output=64f3204a3a0413b6 input=d17516581e478412]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+posonly_keywords_kwonly_opt
+
+    a: object
+    /
+    b: object
+    *
+    c: object
+    d: object = None
+    e: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_keywords_kwonly_opt_impl(PyObject *module, PyObject *a, PyObject *b,
+                                 PyObject *c, PyObject *d, PyObject *e)
+/*[clinic end generated code: output=dbd7e7ddd6257fa0 input=33529f29e97e5adb]*/
+{
+    return pack_arguments_newref(5, a, b, c, d, e);
+}
+
+
+/*[clinic input]
+posonly_keywords_opt_kwonly_opt
+
+    a: object
+    /
+    b: object
+    c: object = None
+    *
+    d: object = None
+    e: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_keywords_opt_kwonly_opt_impl(PyObject *module, PyObject *a,
+                                     PyObject *b, PyObject *c, PyObject *d,
+                                     PyObject *e)
+/*[clinic end generated code: output=775d12ae44653045 input=4d4cc62f11441301]*/
+{
+    return pack_arguments_newref(5, a, b, c, d, e);
+}
+
+
+/*[clinic input]
+posonly_opt_keywords_opt_kwonly_opt
+
+    a: object
+    b: object = None
+    /
+    c: object = None
+    *
+    d: object = None
+
+[clinic start generated code]*/
+
+static PyObject *
+posonly_opt_keywords_opt_kwonly_opt_impl(PyObject *module, PyObject *a,
+                                         PyObject *b, PyObject *c,
+                                         PyObject *d)
+/*[clinic end generated code: output=40c6dc422591eade input=3964960a68622431]*/
+{
+    return pack_arguments_newref(4, a, b, c, d);
+}
+
+
+/*[clinic input]
+keyword_only_parameter
+
+    *
+    a: object
+
+[clinic start generated code]*/
+
+static PyObject *
+keyword_only_parameter_impl(PyObject *module, PyObject *a)
+/*[clinic end generated code: output=c454b6ce98232787 input=8d2868b8d0b27bdb]*/
+{
+    return pack_arguments_newref(1, a);
+}
+
+
+static PyMethodDef tester_methods[] = {
+    TEST_EMPTY_FUNCTION_METHODDEF
+    OBJECTS_CONVERTER_METHODDEF
+    BYTES_OBJECT_CONVERTER_METHODDEF
+    BYTE_ARRAY_OBJECT_CONVERTER_METHODDEF
+    UNICODE_CONVERTER_METHODDEF
+    BOOL_CONVERTER_METHODDEF
+    CHAR_CONVERTER_METHODDEF
+    UNSIGNED_CHAR_CONVERTER_METHODDEF
+    SHORT_CONVERTER_METHODDEF
+    UNSIGNED_SHORT_CONVERTER_METHODDEF
+    INT_CONVERTER_METHODDEF
+    UNSIGNED_INT_CONVERTER_METHODDEF
+    LONG_CONVERTER_METHODDEF
+    UNSIGNED_LONG_CONVERTER_METHODDEF
+    LONG_LONG_CONVERTER_METHODDEF
+    UNSIGNED_LONG_LONG_CONVERTER_METHODDEF
+    PY_SSIZE_T_CONVERTER_METHODDEF
+    SLICE_INDEX_CONVERTER_METHODDEF
+    SIZE_T_CONVERTER_METHODDEF
+    FLOAT_CONVERTER_METHODDEF
+    DOUBLE_CONVERTER_METHODDEF
+    PY_COMPLEX_CONVERTER_METHODDEF
+    STR_CONVERTER_METHODDEF
+    PY_BUFFER_CONVERTER_METHODDEF
+    KEYWORDS_METHODDEF
+    KEYWORDS_KWONLY_METHODDEF
+    KEYWORDS_OPT_METHODDEF
+    KEYWORDS_OPT_KWONLY_METHODDEF
+    KEYWORDS_KWONLY_OPT_METHODDEF
+    POSONLY_KEYWORDS_METHODDEF
+    POSONLY_KWONLY_METHODDEF
+    POSONLY_KEYWORDS_KWONLY_METHODDEF
+    POSONLY_KEYWORDS_OPT_METHODDEF
+    POSONLY_OPT_KEYWORDS_OPT_METHODDEF
+    POSONLY_KWONLY_OPT_METHODDEF
+    POSONLY_OPT_KWONLY_OPT_METHODDEF
+    POSONLY_KEYWORDS_KWONLY_OPT_METHODDEF
+    POSONLY_KEYWORDS_OPT_KWONLY_OPT_METHODDEF
+    POSONLY_OPT_KEYWORDS_OPT_KWONLY_OPT_METHODDEF
+    KEYWORD_ONLY_PARAMETER_METHODDEF
+    {NULL, NULL}
+};
+
+static struct PyModuleDef _testclinic_module = {
+    PyModuleDef_HEAD_INIT,
+    .m_name = "_testclinic",
+    .m_size = 0,
+    .m_methods = tester_methods,
+};
+
+PyMODINIT_FUNC
+PyInit__testclinic(void)
+{
+    return PyModule_Create(&_testclinic_module);
+}
+
+#undef RETURN_PACKED_ARGS