port: advance VC6 typeobject frontier and preserve regression coverage

scripts/vc6-setobject-table-resize-c89.test.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+"""Check set_table_resize's C89 declaration and preserve resize sizing order."""
+import re
+import sys
+from pathlib import Path
+
+source = Path(sys.argv[1]).read_text()
+match = re.search(
+    r"static int\nset_table_resize\(PySetObject \*so, Py_ssize_t minused\)\n\{(.*?)\n\}",
+    source,
+    re.S,
+)
+assert match, "set_table_resize not found"
+body = match.group(1)
+assert re.search(r"^\s*size_t newsize;\s*$", body, re.M), (
+    "newsize must be declared without initializer in the function declaration block"
+)
+assert re.search(
+    r"assert\(minused >= 0\);\s*/\* Find the smallest table size > minused\. \*/"
+    r"\s*/\* XXX speed-up with intrinsics \*/\s*newsize = PySet_MINSIZE;"
+    r"\s*while \(newsize <= \(size_t\)minused\)",
+    body,
+), "newsize initialization and resize loop must remain after the assertion in original order"
+print("set_table_resize C89 declaration and sizing order: PASS")