Function luaL_getmetafield

Source/Misc/lua/src/lua.c:10415–10428

LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
if (!lua_getmetatable(L, obj))  /* no metatable? */
return 0;
lua_pushstring(L, event);
lua_rawget(L, -2);
if (lua_isnil(L, -1)) {
lua_pop(L, 2);  /* remove metatable and metafield */
return 0;
}
else {
lua_remove(L, -2);  /* remove only metatable */
return 1;
}
}


LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {