port: advance VC6 typeobject frontier and preserve regression coverage

2026-10-26 18:09:33 +00:00
parent 35caf1a558
commit 5ab291a68c
162 changed files with 15675 additions and 85 deletions
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+"""Check tuple_vectorcall's C89 nargs declaration and evaluation order."""
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1] if len(sys.argv) > 1 else "cpython/Objects/tupleobject.c")
+match = re.search(
+    r"static PyObject \*\ntuple_vectorcall\([^)]*\)\n\{(.*?)\n\}",
+    source.read_text(),
+    re.S,
+)
+assert match, "tuple_vectorcall definition not found"
+body = match.group(1)
+assert re.match(r"\s*Py_ssize_t nargs;", body), (
+    "tuple_vectorcall: nargs must be declared in the initial declaration block "
+    "before the keyword check for C89 compatibility"
+)
+expected = """
+    Py_ssize_t nargs;
+    if (!_PyArg_NoKwnames("tuple", kwnames)) {
+        return NULL;
+    }
+
+    nargs = PyVectorcall_NARGS(nargsf);
+    if (!_PyArg_CheckPositional("tuple", nargs, 0, 1)) {
+        return NULL;
+    }
+
+    if (nargs) {
+        return tuple_new_impl(_PyType_CAST(type), args[0]);
+    }
+    else {
+        return tuple_get_empty();
+    }
+"""
+assert re.sub(r"\s+", "", body) == re.sub(r"\s+", "", expected), (
+    "preserve keyword rejection before the single nargs evaluation, positional "
+    "validation, and nonempty/empty tuple return paths"
+)
+print("tuple_vectorcall C89 nargs declaration and evaluation order: PASS")