{"action":"opened","issue":{"url":"https://api.github.com/repos/ReadingLab/Discussion-for-Cpp/issues/1","labels_url":"https://api.github.com/repos/ReadingLab/Discussion-for-Cpp/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/ReadingLab/Discussion-for-Cpp/issues/1/comments","events_url":"https://api.github.com/repos/ReadingLab/Discussion-for-Cpp/issues/1/events","html_url":"https://github.com/ReadingLab/Discussion-for-Cpp/issues/1","id":69258962,"number":1,"title":"Exercise 7.49 (b) [proposed by dxiao6]","user":{"login":"Mooophy","id":5942966,"avatar_url":"https://avatars.githubusercontent.com/u/5942966?v=3","gravatar_id":"","url":"https://api.github.com/users/Mooophy","html_url":"https://github.com/Mooophy","followers_url":"https://api.github.com/users/Mooophy/followers","following_url":"https://api.github.com/users/Mooophy/following{/other_user}","gists_url":"https://api.github.com/users/Mooophy/gists{/gist_id}","starred_url":"https://api.github.com/users/Mooophy/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Mooophy/subscriptions","organizations_url":"https://api.github.com/users/Mooophy/orgs","repos_url":"https://api.github.com/users/Mooophy/repos","events_url":"https://api.github.com/users/Mooophy/events{/privacy}","received_events_url":"https://api.github.com/users/Mooophy/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-04-18T02:46:55Z","updated_at":"2015-04-18T02:46:55Z","closed_at":null,"body":"From [豆瓣讨论](http://www.douban.com/group/topic/74293138/)\r\n\r\ndxiao6:\r\n虽然再github上说得很明白了,但还是不理解 为什么加了const就能通过编译了.因为临时变量不能被绑定到普通引用上? 那为什么可以绑定到常量引用上呢?"}}