Parsing grammars using OCaml -

-

I have a task to write a (toy) parser for a (toy) grammar using OCaml and it is not certain how to start (

[[The [[T =" $ "; N XPR]] | Inkrop - T ["+" "]; [T" - "] | Binop-1"]; [T "2"]; [T "3"]; [T "4"]; [T "5"]; [T "6"]; [T "7"]; [T "8"]; [T "9"]];;

And here pars There are some pieces to do: 

  let's frag1 = ["4"; "+"; "3"] ;; let's frag2 = ["9"; "+"; "$"; "1"; "+"] ;;   
 What I see is a rule list that is the result of parsing a piece, such as frag1 ["> 
  [[Xp, [n term; n binop; n XPR]); (Period, [n new]); (Number, [t "3"]); (Binop, [t "+"]); (Xp, [n term]); (Period, [n new]); (Num, [T "4"]]]  
 
 No OCaml libraries except the restriction list are to be used ...: / 
 

  Excerpt Barrotrack parse L = Rule = SD in awksub_grammar REC descend the village L = REC loop = function. [] - & Gt; Increase Background | X :: xs - & gt; Try Back with Effort - -> Loop Xs in Loop (Rule Village) and Effort Branch (Path, Token) = Match Branch, with Token. X :: Branch ', H: Token' when H = X -> Attempt Branch '(T x :: Path), Token') | NN :: Branch ', _ - & gt; ', Token) = n (nn :: path), token) in the effort branch (' path ', token) | [], _ - - gt; path, token | _, _ - & gt; look ( Path, tail) = descend down (fst awksub_grammar) ([], l) in tail, list.rev path

Comments

Post a Comment

Popular posts from this blog

MySql variables and php -

-
I am getting an error with php in order to format mysql_query () in php to format this string What is the right way? SELECT SELECT SELECT (*) Agents @AgentCount; User_Agent_English, User_Angent_Oursal, US.___Gent_Aginal, COUNT (User_Agent_Percade) ACC, COUNT (*) / (AgentCount) Percentage by agents user_agent_preser order DEC limit limit 50; In PHP, how am i setting $ query $ query = "SELECT count (*) agents @ agentcount; SELECT user_agent_parsed, User_agent_original , COUNT (user_agent_parsed) ascount, COUNT (*) / (@AgentCount) as a percentage by user_agent_parced by URI date DESC limit 50 "; This exact query will work properly if I put it in MySQL directly through a command line session. Do I need to release two separate php calls from mysql_query () and store the results first? I get the following error: There is an error in your SQL syntax; Instead of using a sub-selection and instead of using the 'SELECT user_agent_parsed, user_agent_original, ne...
Read more

php - Laravel - Overriding a resource route into a different route filter group -

-
Does Laravel's routing work as expected? What I think, if I want to override a route, then I just have to give the expected route before each other. I have something like this: root :: group (array ('first' = & gt; 'defaultLoads' =); function () {root :: post 'Newsletter', 'newsletter controller @ store'); root: group (array ('(newsletter', 'newsletter controller');}}); That if I post this route, only http://domain.com/newsletter should run only the default loads route filter. However, when I call php Runs artisan routes , I get this: | | POST newsletter | newsletter.store | newslettercontroller@ store | default loads | login | | though it reads the route correctly (PHP artisan loads which The correct path is to the right place) but the file of the resource path even if it is not in the filter group, the path is affected. Then my question: How does it work Laravel? If so, do I post this -> Newsle...
Read more

url rewriting - How to implement the returnurl like SO in PHP? -

-
This URL should work even after the rewrite. Is this possible? Otherwise, I can only hardcoded everything If you are trying to create a login system with redirection You need to use the HTTP_REFERER header to find out where the user came from so that you can send it back there. The best way to do this is to use something like this in your login form: // - Login php & Lt; Input type = "password" name = "password" /> & Lt; Input type = "hidden" name = "returnrelale" value = "& lt ;? php echo $ redirectURL ;? & gt;" / & Gt; & Lt; / Form & gt; Please note that some ISP, browser or proxy will delete the referrer header, so you can not rely on each user to work fully. If you use a statement, to check whether the header exists or not, you can send those users back to the homepage or whatever. Edit If you are looking to use $ _SERVER ['REQUEST_URI'], if you are running Apache It sho...
Read more