{"action":"opened","issue":{"url":"https://api.github.com/repos/picrin-scheme/picrin/issues/288","labels_url":"https://api.github.com/repos/picrin-scheme/picrin/issues/288/labels{/name}","comments_url":"https://api.github.com/repos/picrin-scheme/picrin/issues/288/comments","events_url":"https://api.github.com/repos/picrin-scheme/picrin/issues/288/events","html_url":"https://github.com/picrin-scheme/picrin/issues/288","id":92509664,"number":288,"title":"fast multiple values","user":{"login":"wasabiz","id":540144,"avatar_url":"https://avatars.githubusercontent.com/u/540144?v=3","gravatar_id":"","url":"https://api.github.com/users/wasabiz","html_url":"https://github.com/wasabiz","followers_url":"https://api.github.com/users/wasabiz/followers","following_url":"https://api.github.com/users/wasabiz/following{/other_user}","gists_url":"https://api.github.com/users/wasabiz/gists{/gist_id}","starred_url":"https://api.github.com/users/wasabiz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wasabiz/subscriptions","organizations_url":"https://api.github.com/users/wasabiz/orgs","repos_url":"https://api.github.com/users/wasabiz/repos","events_url":"https://api.github.com/users/wasabiz/events{/privacy}","received_events_url":"https://api.github.com/users/wasabiz/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-07-01T23:44:27Z","updated_at":"2015-07-01T23:44:27Z","closed_at":null,"body":"My plan:\r\n\r\n- Use of values procedure is compiled into byte code\r\n- Introduce a new private syntax builtin:receive. let-values and define-values internally use that.\r\n- Calling values at non-tail position evaluates to the last element: `(let ((a (values 1 2))) a)` => 2. This is (probably) the only breaking changes that users observe."}}