__lanesclone now receives the original as light userdata the first time it is called

1 files changed, 8 insertions, 4 deletions

diff --git a/deep_test/deep_test.c b/deep_test/deep_test.c
index 9585a3c..61c81c5 100644
--- a/deep_test/deep_test.c
+++ b/deep_test/deep_test.c
@@ -166,8 +166,12 @@ static int clonable_lanesclone( lua_State* L)
 {
         switch( lua_gettop( L))
         {
-                case 0:
-                lua_pushinteger( L, sizeof( struct s_MyClonableUserdata));
+                case 1:
+                {
+                        // in case we need it to compute the amount of memory we need
+                        struct s_MyClonableUserdata* self = lua_touserdata( L, 1);
+                        lua_pushinteger( L, sizeof( struct s_MyClonableUserdata));
+                }
                 return 1;
 
                 case 2:
@@ -175,8 +179,8 @@ static int clonable_lanesclone( lua_State* L)
                         struct s_MyClonableUserdata* self = lua_touserdata( L, 1);
                         struct s_MyClonableUserdata* from = lua_touserdata( L, 2);
                         *self = *from;
-                        return 0;
                 }
+                return 0;
 
                 default:
                 (void) luaL_error( L, "Lanes called clonable_lanesclone with unexpected parameters");
@@ -223,7 +227,7 @@ extern int __declspec(dllexport) luaopen_deep_test(lua_State* L)
 {
         luaL_newlib( L, deep_module);                           // M
 
-        // preregister the metatables for the types we can instanciate so that Lanes can know about them
+        // preregister the metatables for the types we can instantiate so that Lanes can know about them
         if( luaL_newmetatable( L, "clonable"))                  // M mt
         {
                 luaL_setfuncs( L, clonable_mt, 0);