{"action":"created","issue":{"url":"https://api.github.com/repos/RobotLocomotion/drake/issues/3301","repository_url":"https://api.github.com/repos/RobotLocomotion/drake","labels_url":"https://api.github.com/repos/RobotLocomotion/drake/issues/3301/labels{/name}","comments_url":"https://api.github.com/repos/RobotLocomotion/drake/issues/3301/comments","events_url":"https://api.github.com/repos/RobotLocomotion/drake/issues/3301/events","html_url":"https://github.com/RobotLocomotion/drake/pull/3301","id":173909595,"number":3301,"title":"Allow System2 LCM translators to specify output vector 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a future PR, this will be used by the `Cars` vector classes, so that LCM message inputs such as `DrivingCommand` can be used by `SimpleCar` using `get_steering_angle` instead of `GetAtIndex(0)`.\r\n\r\nSee commit history for details of the edits.  In particular, the first two commits are functionality-neutral.\n\n<!-- Reviewable:start -->\n---\nThis change is [<img src=\"https://reviewable.io/review_button.svg\" height=\"34\" align=\"absmiddle\" alt=\"Reviewable\"/>](https://reviewable.io/reviews/robotlocomotion/drake/3301)\n<!-- Reviewable:end -->\n"},"comment":{"url":"https://api.github.com/repos/RobotLocomotion/drake/issues/comments/243635138","html_url":"https://github.com/RobotLocomotion/drake/pull/3301#issuecomment-243635138","issue_url":"https://api.github.com/repos/RobotLocomotion/drake/issues/3301","id":243635138,"user":{"login":"liangfok","id":1388098,"avatar_url":"https://avatars.githubusercontent.com/u/1388098?v=3","gravatar_id":"","url":"https://api.github.com/users/liangfok","html_url":"https://github.com/liangfok","followers_url":"https://api.github.com/users/liangfok/followers","following_url":"https://api.github.com/users/liangfok/following{/other_user}","gists_url":"https://api.github.com/users/liangfok/gists{/gist_id}","starred_url":"https://api.github.com/users/liangfok/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/liangfok/subscriptions","organizations_url":"https://api.github.com/users/liangfok/orgs","repos_url":"https://api.github.com/users/liangfok/repos","events_url":"https://api.github.com/users/liangfok/events{/privacy}","received_events_url":"https://api.github.com/users/liangfok/received_events","type":"User","site_admin":false},"created_at":"2016-08-31T01:47:47Z","updated_at":"2016-08-31T01:47:47Z","body":"<img class=\"emoji\" title=\":lgtm:\" alt=\":lgtm:\" align=\"absmiddle\" src=\"https://reviewable.io/lgtm.png\" height=\"20\" width=\"61\"/>\n\n---\n\nReviewed 2 of 2 files at r2, 1 of 1 files at r3.\nReview status: all files reviewed at latest revision, 2 unresolved discussions.\n\n---\n\n*[drake/systems/lcm/lcm_and_vector_base_translator.h, line 36 \\[r2\\]](https://reviewable.io:443/reviews/robotlocomotion/drake/3301#-KQTGGTlCDyEXvlGGvTk:-KQTGGTmvpu46bxn_naa:bsrv6e9) ([raw file](https://github.com/robotlocomotion/drake/blob/cc467386dd57e34f8aa69f4ef44c4792ee67b279/drake/systems/lcm/lcm_and_vector_base_translator.h#L36)):*\n> ```objc\n>   /**\n>    * Allocates the vector storage for an output port of our LCM message type,\n>    * in case special storage is needed.  A result of nullptr indicates that no\n> ```\n\nBTW: nit: optional: surround `nullptr` with back ticks.\n\n---\n\n\n*Comments from [Reviewable](https://reviewable.io:443/reviews/robotlocomotion/drake/3301#-:-KQTGwuqxV6BELBya4TY:bnfp4nl)*\n<!-- Sent from Reviewable.io -->\n"}}
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