{"action":"opened","issue":{"url":"https://api.github.com/repos/ingydotnet/pegex-pm/issues/35","labels_url":"https://api.github.com/repos/ingydotnet/pegex-pm/issues/35/labels{/name}","comments_url":"https://api.github.com/repos/ingydotnet/pegex-pm/issues/35/comments","events_url":"https://api.github.com/repos/ingydotnet/pegex-pm/issues/35/events","html_url":"https://github.com/ingydotnet/pegex-pm/issues/35","id":65104772,"number":35,"title":"More informative diagnostic messages for syntax errors in user input ","user":{"login":"agentzh","id":56241,"avatar_url":"https://avatars.githubusercontent.com/u/56241?v=3","gravatar_id":"","url":"https://api.github.com/users/agentzh","html_url":"https://github.com/agentzh","followers_url":"https://api.github.com/users/agentzh/followers","following_url":"https://api.github.com/users/agentzh/following{/other_user}","gists_url":"https://api.github.com/users/agentzh/gists{/gist_id}","starred_url":"https://api.github.com/users/agentzh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/agentzh/subscriptions","organizations_url":"https://api.github.com/users/agentzh/orgs","repos_url":"https://api.github.com/users/agentzh/repos","events_url":"https://api.github.com/users/agentzh/events{/privacy}","received_events_url":"https://api.github.com/users/agentzh/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-03-29T22:58:52Z","updated_at":"2015-03-29T22:58:52Z","closed_at":null,"body":"Pegex has a wonder automatic error reporting feature for user input's syntax errors. What I've found could be a further improvement is an automatically generated hint like \"expecting foo, bar, and baz instead\" where `foo`, `bar`, and `baz` are the related rule names automatically induced from the grammar.\r\n\r\nI know we already have the back-tick custom error message feature, but it quickly becomes a burden to add all the back-tick strings to large grammars."}}