Enforced that upb_msg lives in an Arena only, and other simplifying.

upb_msg was trying to be general enough that it could either live in
an arena or be allocated with malloc()/free().  This was too much
complexity for too little benefit.  We should commit to just saying
that upb_msg is arena-only.

I also ripped out the code to glue upb_msg to the existing
handlers-based encoder/decoder.  upb_msg has its own, small, simple
encoder/decoder.  I'm trying to whittle down upb_msg to a small
and simple core.

I updated the Lua extension for these changes.  Lua needs some more
work to properly create arenas per message.  For now I just created
a single global arena.

1 files changed, 2 insertions, 1 deletions

diff --git a/upb/bindings/lua/upb.h b/upb/bindings/lua/upb.h
index ea2910a..52bc5a2 100644
--- a/upb/bindings/lua/upb.h
+++ b/upb/bindings/lua/upb.h
@@ -131,11 +131,12 @@ int lupb_arena_new(lua_State *L);
 int lupb_msg_pushref(lua_State *L, int msgclass, void *msg);
 const upb_msg *lupb_msg_checkmsg(lua_State *L, int narg,
                                  const lupb_msgclass *lmsgclass);
+upb_msg *lupb_msg_checkmsg2(lua_State *L, int narg,
+                            const upb_msglayout **layout);
 
 const lupb_msgclass *lupb_msgclass_check(lua_State *L, int narg);
 const upb_msglayout *lupb_msgclass_getlayout(lua_State *L, int narg);
 const upb_msgdef *lupb_msgclass_getmsgdef(const lupb_msgclass *lmsgclass);
-const upb_handlers *lupb_msgclass_getmergehandlers(lua_State *L, int narg);
 upb_msgfactory *lupb_msgclass_getfactory(const lupb_msgclass *lmsgclass);
 void lupb_msg_registertypes(lua_State *L);