bpo-37032: Add CodeType.replace() method (GH-13542)

diff --git a/Objects/clinic/codeobject.c.h b/Objects/clinic/codeobject.c.h
new file mode 100644
index 0000000..ec127ce
--- /dev/null
+++ b/Objects/clinic/codeobject.c.h
@@ -0,0 +1,256 @@
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(code_replace__doc__,
+"replace($self, /, *, co_argcount=-1, co_posonlyargcount=-1,\n"
+"        co_kwonlyargcount=-1, co_nlocals=-1, co_stacksize=-1,\n"
+"        co_flags=-1, co_firstlineno=-1, co_code=None, co_consts=None,\n"
+"        co_names=None, co_varnames=None, co_freevars=None,\n"
+"        co_cellvars=None, co_filename=None, co_name=None,\n"
+"        co_lnotab=None)\n"
+"--\n"
+"\n"
+"Return a new code object with new specified fields.");
+
+#define CODE_REPLACE_METHODDEF    \
+    {"replace", (PyCFunction)(void(*)(void))code_replace, METH_FASTCALL|METH_KEYWORDS, code_replace__doc__},
+
+static PyObject *
+code_replace_impl(PyCodeObject *self, int co_argcount,
+                  int co_posonlyargcount, int co_kwonlyargcount,
+                  int co_nlocals, int co_stacksize, int co_flags,
+                  int co_firstlineno, PyBytesObject *co_code,
+                  PyObject *co_consts, PyObject *co_names,
+                  PyObject *co_varnames, PyObject *co_freevars,
+                  PyObject *co_cellvars, PyObject *co_filename,
+                  PyObject *co_name, PyBytesObject *co_lnotab);
+
+static PyObject *
+code_replace(PyCodeObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *return_value = NULL;
+    static const char * const _keywords[] = {"co_argcount", "co_posonlyargcount", "co_kwonlyargcount", "co_nlocals", "co_stacksize", "co_flags", "co_firstlineno", "co_code", "co_consts", "co_names", "co_varnames", "co_freevars", "co_cellvars", "co_filename", "co_name", "co_lnotab", NULL};
+    static _PyArg_Parser _parser = {NULL, _keywords, "replace", 0};
+    PyObject *argsbuf[16];
+    Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 0;
+    int co_argcount = self->co_argcount;
+    int co_posonlyargcount = self->co_posonlyargcount;
+    int co_kwonlyargcount = self->co_kwonlyargcount;
+    int co_nlocals = self->co_nlocals;
+    int co_stacksize = self->co_stacksize;
+    int co_flags = self->co_flags;
+    int co_firstlineno = self->co_firstlineno;
+    PyBytesObject *co_code = (PyBytesObject *)self->co_code;
+    PyObject *co_consts = self->co_consts;
+    PyObject *co_names = self->co_names;
+    PyObject *co_varnames = self->co_varnames;
+    PyObject *co_freevars = self->co_freevars;
+    PyObject *co_cellvars = self->co_cellvars;
+    PyObject *co_filename = self->co_filename;
+    PyObject *co_name = self->co_name;
+    PyBytesObject *co_lnotab = (PyBytesObject *)self->co_lnotab;
+
+    args = _PyArg_UnpackKeywords(args, nargs, NULL, kwnames, &_parser, 0, 0, 0, argsbuf);
+    if (!args) {
+        goto exit;
+    }
+    if (!noptargs) {
+        goto skip_optional_kwonly;
+    }
+    if (args[0]) {
+        if (PyFloat_Check(args[0])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_argcount = _PyLong_AsInt(args[0]);
+        if (co_argcount == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[1]) {
+        if (PyFloat_Check(args[1])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_posonlyargcount = _PyLong_AsInt(args[1]);
+        if (co_posonlyargcount == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[2]) {
+        if (PyFloat_Check(args[2])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_kwonlyargcount = _PyLong_AsInt(args[2]);
+        if (co_kwonlyargcount == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[3]) {
+        if (PyFloat_Check(args[3])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_nlocals = _PyLong_AsInt(args[3]);
+        if (co_nlocals == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[4]) {
+        if (PyFloat_Check(args[4])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_stacksize = _PyLong_AsInt(args[4]);
+        if (co_stacksize == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[5]) {
+        if (PyFloat_Check(args[5])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_flags = _PyLong_AsInt(args[5]);
+        if (co_flags == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[6]) {
+        if (PyFloat_Check(args[6])) {
+            PyErr_SetString(PyExc_TypeError,
+                            "integer argument expected, got float" );
+            goto exit;
+        }
+        co_firstlineno = _PyLong_AsInt(args[6]);
+        if (co_firstlineno == -1 && PyErr_Occurred()) {
+            goto exit;
+        }
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[7]) {
+        if (!PyBytes_Check(args[7])) {
+            _PyArg_BadArgument("replace", 8, "bytes", args[7]);
+            goto exit;
+        }
+        co_code = (PyBytesObject *)args[7];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[8]) {
+        if (!PyTuple_Check(args[8])) {
+            _PyArg_BadArgument("replace", 9, "tuple", args[8]);
+            goto exit;
+        }
+        co_consts = args[8];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[9]) {
+        if (!PyTuple_Check(args[9])) {
+            _PyArg_BadArgument("replace", 10, "tuple", args[9]);
+            goto exit;
+        }
+        co_names = args[9];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[10]) {
+        if (!PyTuple_Check(args[10])) {
+            _PyArg_BadArgument("replace", 11, "tuple", args[10]);
+            goto exit;
+        }
+        co_varnames = args[10];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[11]) {
+        if (!PyTuple_Check(args[11])) {
+            _PyArg_BadArgument("replace", 12, "tuple", args[11]);
+            goto exit;
+        }
+        co_freevars = args[11];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[12]) {
+        if (!PyTuple_Check(args[12])) {
+            _PyArg_BadArgument("replace", 13, "tuple", args[12]);
+            goto exit;
+        }
+        co_cellvars = args[12];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[13]) {
+        if (!PyUnicode_Check(args[13])) {
+            _PyArg_BadArgument("replace", 14, "str", args[13]);
+            goto exit;
+        }
+        if (PyUnicode_READY(args[13]) == -1) {
+            goto exit;
+        }
+        co_filename = args[13];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (args[14]) {
+        if (!PyUnicode_Check(args[14])) {
+            _PyArg_BadArgument("replace", 15, "str", args[14]);
+            goto exit;
+        }
+        if (PyUnicode_READY(args[14]) == -1) {
+            goto exit;
+        }
+        co_name = args[14];
+        if (!--noptargs) {
+            goto skip_optional_kwonly;
+        }
+    }
+    if (!PyBytes_Check(args[15])) {
+        _PyArg_BadArgument("replace", 16, "bytes", args[15]);
+        goto exit;
+    }
+    co_lnotab = (PyBytesObject *)args[15];
+skip_optional_kwonly:
+    return_value = code_replace_impl(self, co_argcount, co_posonlyargcount, co_kwonlyargcount, co_nlocals, co_stacksize, co_flags, co_firstlineno, co_code, co_consts, co_names, co_varnames, co_freevars, co_cellvars, co_filename, co_name, co_lnotab);
+
+exit:
+    return return_value;
+}
+/*[clinic end generated code: output=624ab6f2ea8f0ea4 input=a9049054013a1b77]*/