eris: table nodes now have room to store sequence number

luprex/eris-master/src/lobject.h

@@ -542,29 +542,29 @@ typedef union Closure {
 ** Tables
 */
 
-typedef union TKey {
-  struct {
-    TValuefields;
-    struct Node *next;  /* for chaining */
-  } nk;
-  TValue tvk;
-} TKey;
-
+typedef struct ANode {
+  TValue i_val;
+  int i_sequence;
+} ANode;
 
 typedef struct Node {
-  TValue i_val;
-  TKey i_key;
+  ANode anode;
+  TValue i_key;
+  struct Node *i_next;
 } Node;
 
-
 typedef struct Table {
   CommonHeader;
   lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
   lu_byte lsizenode;  /* log2 of size of `node' array */
   int sizearray;  /* size of `array' array */
-  TValue *array;  /* array part */
+  int nnkeys;     /* number of non-nil keys in both array and hash */
+  int lastdelseq;  /* sequence number of last deleted */
+  ANode *array;  /* array part */
   Node *node;
   Node *lastfree;  /* any free position is before this position */
+  int *sequence;  /* locators for all non-nil keys */
+  ANode *lastdeleted;  /* pointer to last deleted item */
   struct Table *metatable;
   GCObject *gclist;
 } Table;