From: Guido van Rossum <guido@python.org>
Date: Tue, 17 Sep 2002 03:24:09 +0000 (+0000)
Subject: Rearrange the members of struct _node to put shorter fields towards
X-Git-Tag: v2.3c1~4051
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=73d66925d90facf9a4a831d8ea5b1ffe6b4653c3;p=thirdparty%2FPython%2Fcpython.git

Rearrange the members of struct _node to put shorter fields towards
the end, in the hope of saving some bytes on 64-bit machines.  (Too
bad n_nchildren can't be made an unsigned short, but
test/test_longexp.py specifically tests for more than 2**16 subtrees
at one level.)

I don't expect any binary compatibility issues here, unless someone
has an old binary of parsermodule.so saved away.
---

diff --git a/Include/node.h b/Include/node.h
index 8f5ef236aa8d..c909ec5a9fcf 100644
--- a/Include/node.h
+++ b/Include/node.h
@@ -8,11 +8,11 @@ extern "C" {
 #endif
 
 typedef struct _node {
-    short		n_type;
     char		*n_str;
+    struct _node	*n_child;
     int			n_lineno;
     int			n_nchildren;
-    struct _node	*n_child;
+    short		n_type;
 } node;
 
 PyAPI_FUNC(node *) PyNode_New(int type);