Tag methods

1 files changed, 61 insertions, 0 deletions

diff --git a/ltm.h b/ltm.h
new file mode 100644
index 00000000..7227c243
--- /dev/null
+++ b/ltm.h
@@ -0,0 +1,61 @@
+/*
+** $Id: $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltm_h
+#define ltm_h
+
+
+#include "lobject.h"
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER IM"
+*/
+typedef enum {
+  IM_GETTABLE = 0,
+  IM_SETTABLE,
+  IM_INDEX,
+  IM_GETGLOBAL,
+  IM_SETGLOBAL,
+  IM_ADD,
+  IM_SUB,
+  IM_MUL,
+  IM_DIV,
+  IM_POW,
+  IM_UNM,
+  IM_LT,
+  IM_LE,
+  IM_GT,
+  IM_GE,
+  IM_CONCAT,
+  IM_GC,
+  IM_FUNCTION
+} IMS;
+
+#define IM_N 18
+
+
+extern struct IM {
+  TObject int_method[IM_N];
+} *luaT_IMtable;
+
+
+#define luaT_getim(tag,event) (&luaT_IMtable[-(tag)].int_method[event])
+#define luaT_getimbyObj(o,e)  (luaT_getim(luaT_efectivetag(o),(e)))
+
+extern char *luaT_eventname[];
+
+
+void luaT_settag (int tag, TObject *o);
+void luaT_realtag (int tag);
+int luaT_efectivetag (TObject *o);
+void luaT_settagmethod (int t, char *event, TObject *func);
+TObject *luaT_gettagmethod (int t, char *event);
+char *luaT_travtagmethods (int (*fn)(TObject *));
+
+void luaT_setfallback (void);  /* only if LUA_COMPAT2_5 */
+
+#endif