48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
#!/usr/bin/env python3
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"""Check type_new_classmethod's C89 declaration and guarded allocation."""
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import re
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from pathlib import Path
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source = Path("cpython/Objects/typeobject.c").read_text()
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match = re.search(
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r"\nstatic int\ntype_new_classmethod\(PyTypeObject \*type, PyObject \*attr\)\n\{(.*?)\n\}",
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source,
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re.S,
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)
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assert match, "type_new_classmethod definition missing"
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body = re.sub(r"/\*.*?\*/|//[^\n]*", "", match.group(1), flags=re.S)
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assert re.match(
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r"\s*PyObject \*method;"
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r"\s*PyObject \*func = PyDict_GetItemWithError\(type->tp_dict, attr\);",
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body,
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), "type_new_classmethod: method must be in the opening declaration block (C89)"
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expected = """
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PyObject *method;
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PyObject *func = PyDict_GetItemWithError(type->tp_dict, attr);
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if (func == NULL) {
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if (PyErr_Occurred()) {
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return -1;
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}
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return 0;
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}
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if (!PyFunction_Check(func)) {
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return 0;
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}
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method = PyClassMethod_New(func);
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if (method == NULL) {
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return -1;
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}
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if (PyDict_SetItem(type->tp_dict, attr, method) < 0) {
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Py_DECREF(method);
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return -1;
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}
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Py_DECREF(method);
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return 0;
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"""
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assert body.split() == expected.split(), (
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"type_new_classmethod: preserve lookup, guards, allocation timing, "
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"dictionary insertion, decrefs, and returns"
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)
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print("type_new_classmethod method C89 declaration and guarded allocation: PASS")
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