Function luaL_testudata

extlibs/sol3/include/sol/sol.hpp:2671–2685

}

COMPAT53_API void *luaL_testudata(lua_State *L, int i, const char *tname) {
	void *p = lua_touserdata(L, i);
	luaL_checkstack(L, 2, "not enough stack slots");
	if (p == NULL || !lua_getmetatable(L, i))
		return NULL;
	else {
		int res = 0;
		luaL_getmetatable(L, tname);
		res = lua_rawequal(L, -1, -2);
		lua_pop(L, 2);
		if (!res)
			p = NULL;
	}
	return p;
}

static int compat53_countlevels(lua_State *L) {
	lua_Debug ar;