#!/usr/bin/env python3
"""Check type_new_get_bases base local is C89-compatible and assigned in place."""
import re
from pathlib import Path

source = Path("cpython/Objects/typeobject.c").read_text()
match = re.search(
    r"\nstatic int\ntype_new_get_bases\(type_new_ctx \*ctx, PyObject \*\*type\)\n\{(.*?)\n\}",
    source, re.S,
)
assert match, "type_new_get_bases definition missing"
body = re.sub(r"/\*.*?\*/|//[^\n]*", "", match.group(1), flags=re.S)
assert re.match(
    r"\s*Py_ssize_t nbases = PyTuple_GET_SIZE\(ctx->bases\);"
    r"\s*Py_ssize_t i;\s*PyTypeObject \*winner;\s*PyTypeObject \*base;"
    r"\s*if \(nbases == 0\)",
    body,
), "type_new_get_bases: base must be in the opening declaration block (C89)"
assert len(re.findall(r"\bPyTypeObject\s*\*\s*base\b", body)) == 1, (
    "declare base exactly once"
)
assert re.search(r"\n\s*base = best_base\(ctx->bases\);", body), (
    "preserve best_base evaluation at its original point"
)
assert re.search(
    r"base = best_base\(ctx->bases\);\s*if \(base == NULL\) \{\s*return -1;\s*\}\s*"
    r"ctx->base = base;\s*ctx->bases = Py_NewRef\(ctx->bases\);\s*return 0;",
    body,
), "preserve best-base validation and subsequent reference updates"
print("type_new_get_bases base C89 declaration and evaluation ordering: PASS")