{"action":"created","issue":{"url":"https://api.github.com/repos/rust-lang/rust/issues/21866","labels_url":"https://api.github.com/repos/rust-lang/rust/issues/21866/labels{/name}","comments_url":"https://api.github.com/repos/rust-lang/rust/issues/21866/comments","events_url":"https://api.github.com/repos/rust-lang/rust/issues/21866/events","html_url":"https://github.com/rust-lang/rust/issues/21866","id":56251788,"number":21866,"title":"`mut` is a little noisy, how about `!`?","user":{"login":"FuGangqiang","id":1223384,"avatar_url":"https://avatars.githubusercontent.com/u/1223384?v=3","gravatar_id":"","url":"https://api.github.com/users/FuGangqiang","html_url":"https://github.com/FuGangqiang","followers_url":"https://api.github.com/users/FuGangqiang/followers","following_url":"https://api.github.com/users/FuGangqiang/following{/other_user}","gists_url":"https://api.github.com/users/FuGangqiang/gists{/gist_id}","starred_url":"https://api.github.com/users/FuGangqiang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/FuGangqiang/subscriptions","organizations_url":"https://api.github.com/users/FuGangqiang/orgs","repos_url":"https://api.github.com/users/FuGangqiang/repos","events_url":"https://api.github.com/users/FuGangqiang/events{/privacy}","received_events_url":"https://api.github.com/users/FuGangqiang/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-02-02T15:41:56Z","updated_at":"2015-02-02T15:47:26Z","closed_at":"2015-02-02T15:42:58Z","body":"variables:\r\n```\r\nlet immut_var = 1;\r\nlet! mut_var = 1;\r\nlet pair = (1, 2);\r\nlet (!x, y) = pair;\r\n```\r\n\r\nfuctions:\r\n```\r\nfn borrow_book(book: &Book) {\r\n    println!(\"I borrowed {} {} edition\", book.title, book.year);\r\n}\r\n\r\nfn new_edition(book: &! Book) {\r\n    book.year = 2014;\r\n}\r\n```\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/rust-lang/rust/issues/comments/72479203","html_url":"https://github.com/rust-lang/rust/issues/21866#issuecomment-72479203","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/21866","id":72479203,"user":{"login":"steveklabnik","id":27786,"avatar_url":"https://avatars.githubusercontent.com/u/27786?v=3","gravatar_id":"","url":"https://api.github.com/users/steveklabnik","html_url":"https://github.com/steveklabnik","followers_url":"https://api.github.com/users/steveklabnik/followers","following_url":"https://api.github.com/users/steveklabnik/following{/other_user}","gists_url":"https://api.github.com/users/steveklabnik/gists{/gist_id}","starred_url":"https://api.github.com/users/steveklabnik/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/steveklabnik/subscriptions","organizations_url":"https://api.github.com/users/steveklabnik/orgs","repos_url":"https://api.github.com/users/steveklabnik/repos","events_url":"https://api.github.com/users/steveklabnik/events{/privacy}","received_events_url":"https://api.github.com/users/steveklabnik/received_events","type":"User","site_admin":false},"created_at":"2015-02-02T15:47:26Z","updated_at":"2015-02-02T15:47:26Z","body":"(and it would need to be an RFC)"}}