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userdata can have different tags

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This commit is contained in:
Roberto Ierusalimschy
1994-11-17 19:23:43 -02:00
parent aa4cd37adf
commit 1929ddcf49
3 changed files with 21 additions and 19 deletions
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21
lua.h
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@@ -2,7 +2,7 @@
** LUA - Linguagem para Usuarios de Aplicacao
** Grupo de Tecnologia em Computacao Grafica
** TeCGraf - PUC-Rio
** $Id: lua.h,v 3.7 1994/11/13 16:17:04 roberto Exp $
** $Id: lua.h,v 3.8 1994/11/17 16:41:42 roberto Exp roberto $
*/
@@ -13,14 +13,13 @@
typedef enum
{
LUA_T_MARK,
LUA_T_NIL,
LUA_T_NUMBER,
LUA_T_STRING,
LUA_T_ARRAY,
LUA_T_FUNCTION,
LUA_T_CFUNCTION,
LUA_T_USERDATA
LUA_T_NIL = -1,
LUA_T_NUMBER = -2,
LUA_T_STRING = -3,
LUA_T_ARRAY = -4,
LUA_T_FUNCTION = -5,
LUA_T_CFUNCTION= -6,
LUA_T_USERDATA = 0
} lua_Type;
@@ -53,7 +52,7 @@ int lua_pushnil (void);
int lua_pushnumber (float n);
int lua_pushstring (char *s);
int lua_pushcfunction (lua_CFunction fn);
int lua_pushuserdata (void *u);
int lua_pushusertag (void *u, int tag);
int lua_pushobject (lua_Object object);
lua_Object lua_getglobal (char *name);
@@ -77,6 +76,8 @@ lua_Object lua_createTable (int initSize);
#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript())
#define lua_getfield(o,f) (lua_pushobject(o), lua_pushstring(f), lua_getsubscript())
#define lua_pushuserdata(u) lua_pushusertag(u,LUA_USERDATA)
#define lua_isnil(_) (lua_type(_)==LUA_T_NIL)
#define lua_isnumber(_) (lua_type(_)==LUA_T_NUMBER)
#define lua_isstring(_) (lua_type(_)==LUA_T_STRING)