Merge pull request #124 from trukanduk/master

Added __lanesignore field for metatables

1 files changed, 17 insertions, 1 deletions

diff --git a/src/tools.c b/src/tools.c
index 3a19605..9a1c19d 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -1392,10 +1392,26 @@ static void push_cached_func( struct s_Universe* U, lua_State* L2, uint_t L2_cac
 static bool_t inter_copy_one_( struct s_Universe* U, lua_State* L2, uint_t L2_cache_i, lua_State* L, uint_t i, enum e_vt vt, enum eLookupMode mode_, char const* upName_)
 {
         bool_t ret = TRUE;
+        bool_t ignore = FALSE;
         STACK_GROW( L2, 1);
         STACK_CHECK( L2);
 
-        switch( lua_type( L, i))
+        /* Skip the object if it has metatable with { __lanesignore = true } */
+        if( lua_getmetatable( L, i))                                                                    // ... mt
+        {
+                lua_pushstring( L, "__lanesignore");                                                        // ... mt "__lanesignore"
+                lua_gettable( L, -2);                                                                       // ... mt ignore?
+
+                if( lua_isboolean( L, -1) && lua_toboolean( L, -1))
+                {
+                        ignore = TRUE;
+                }
+
+                lua_pop( L, 2);                                                                             // ...
+        }
+
+        /* Lets push nil to L2 if the object should be ignored */
+        switch( ignore ? LUA_TNIL : lua_type( L, i))
         {
                 /* Basic types allowed both as values, and as table keys */