Re: Need some help to use TFUNCTION

[Roberto Ierusalimschy <roberto@...>]

>   Another way is to store a reference in the Lua Registry:
>   
>   	int myfuncref;
>   	
>   	static int foo(lua_State *L)
>   	{
>   	  
>   	  luaL_checktype(L,1,LUA_TFUNCTION);
>   	  myfuncref = luaL_ref(L,LUA_REGISTRYINDEX);
>   	  lua_pushinteger(L,myfuncref);
>   	  lua_pushvalue(L,1);
>   	  lua_settable(L,LUA_REGISTRYINDEX);
>   	  return 0;
>   	}

luaL_ref does all the work (see the manual). This function should be
like this:

  	static int foo(lua_State *L) {
    	  luaL_checktype(L,1,LUA_TFUNCTION);
    	  myfuncref = luaL_ref(L,LUA_REGISTRYINDEX);
    	  return 0;
    	}


>   And to call that:
>   
>   	static int bar(lua_State *L)
>   	{
>   	  lua_pushinteger(L,myfuncref);
>   	  lua_gettable(L,LUA_REGISTRYINDEX);
>   	  lua_call(L,0,0);
>   	  return 0;
>   	}

(It is simpler to use 'lua_rawgeti'...)

-- Roberto