Re: Testing for the presence of lua functions from C

[Edgar Toernig <froese@...>]

bwalmisley@btinternet.com wrote:
>
> So when "fredname" is destroyed something like:
> 
> if( lua_isFunctionPresent("fredname_IsDestroyed")
>       {
>       lua_fn = lua_getglobal("fredname_IsDestroyed");
>       lua_callfunction(lua_fn);
>       }

lua_getglobal(L, "fredname_IsDestroyed");	// you get nil if undefined
if (lua_type(L, -1) != LUA_TNIL)		// or: ... == LUA_TFUNCTION
    lua_call(L, 0, 0);
else
    lua_pop(L, 1);

Ciao, ET.