SendInviteResult - 不完全な型 'class firebase :: Future <firebase :: invites :: InvitesSender :: SendInviteResult>'の無効な使用。

Question

C++では、招待状の送信方法は？それ

error: invalid use of incomplete type 'class firebase::Future<firebase::invites::InvitesSender::SendInviteResult>' 
    sender->SendInvite(); 
firebase_cpp_sdk\include/firebase/invites/sender.h:12:7: error: declaration of 'class firebase::Future<firebase::invites::InvitesSender::SendInviteResult>' 
class Future; 

Answer 1

が見つかりました：

firebase::invites::InvitesSender *sender = new firebase::invites::InvitesSender(*_app); 
sender->SetTitleText("Invite Friends"); 
sender->SetMessageText("Try my app today, and get 200 free coins!"); 
sender->SetCallToActionText("Download now!"); 
sender->SendInvite(); 

コンパイラはエラーを与えます！含める必要があります：

#include <firebase/future.h>