Use heap types for builtin wrappers

Closes #3196

CHANGES.current

@@ -7,6 +7,11 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.4.0 (in progress)
 ===========================
 
+2025-06-20: wsfulton
+            [Python] #3196 Heap types are now generated by default instead of static types
+            for the builtin wrappers. Defining SWIG_HEAPTYPES to use heap types
+            is no longer required.
+
 2025-06-18: wsfulton
             [Python] #3196 Add support for -builtin and heap types turned on with
             -DSWIG_HEAPTYPES. This is an important step towards supporting a number of

Lib/python/pyhead.swg

@@ -1,4 +1,4 @@
-#if !defined(SWIGPYTHON_BUILTIN) && PY_VERSION_HEX >= 0x03030000
+#if PY_VERSION_HEX >= 0x03030000 && !defined(SWIG_NO_HEAPTYPES)
 #if !defined(SWIG_HEAPTYPES)
 #define SWIG_HEAPTYPES
 #endif

Source/Modules/python.cxx

@@ -4458,7 +4458,7 @@ public:
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_clear"), "tp_clear", "inquiry");
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_richcompare", richcompare_func), "tp_richcompare", "richcmpfunc");
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_methods", methods_name), "tp_methods");
-    // printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_members"), "tp_members");
+    printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_members"), "tp_members");
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_getset", getset_name), "tp_getset");
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_hash", tp_hash), "tp_hash", "hashfunc");
     printHeapTypesSlot(f, getHeapTypesSlot(n, "feature:python:tp_call"), "tp_call", "ternaryfunc");