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 +1,44 @@
+#!/usr/bin/env python3
+"""Check set_vectorcall's C89 declaration and unchanged evaluation order."""
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1]).read_text()
+match = re.search(
+    r"static PyObject\*\nset_vectorcall\(PyObject \*type, PyObject \* const\*args,"
+    r"\s*size_t nargsf, PyObject \*kwnames\)\n\{(.*?)\n\}",
+    source,
+    re.S,
+)
+assert match, "set_vectorcall not found"
+body = match.group(1)
+assert re.match(r"\s*Py_ssize_t nargs;", body), (
+    "set_vectorcall: nargs must be declared without an initializer before "
+    "assert(PyType_Check(type)); late declaration is not C89 compatible"
+)
+expected = """
+    Py_ssize_t nargs;
+
+    assert(PyType_Check(type));
+
+    if (!_PyArg_NoKwnames("set", kwnames)) {
+        return NULL;
+    }
+
+    nargs = PyVectorcall_NARGS(nargsf);
+    if (!_PyArg_CheckPositional("set", nargs, 0, 1)) {
+        return NULL;
+    }
+
+    if (nargs) {
+        return make_new_set(_PyType_CAST(type), args[0]);
+    }
+
+    return make_new_set(_PyType_CAST(type), NULL);
+"""
+assert re.sub(r"\s+", "", body) == re.sub(r"\s+", "", expected), (
+    "preserve type assertion, keyword rejection, nargs evaluation, positional "
+    "rejection, guarded args[0] access, and construction in their original order"
+)
+print("set_vectorcall C89 declaration and evaluation order: PASS")