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Parse Error On Input Import Haskell


I think I'm going to leave the v and e data types generalized though, because that was part of the original template and I think my prof wants it to be Terms Privacy Security Status Help You can't perform that action at this time. gracjan commented Jul 19, 2015 @k-bx: It would be really appreciated if you did it. Reload to refresh your session. http://back2cloud.com/parse-error/parse-error-on-input-where-haskell.php

We recommend upgrading to the latest Safari, Google Chrome, or Firefox. I'll try to do it then. Do these physical parameters seem plausible? Why is the old Universal logo used for a 2009 movie? More about the author

Parse Error On Input Haskell

It looks pretty stabilized to me, I think this error-reporting didn't change for 3 releases already (but need to check to be sure). Privacy policy About HaskellWiki Disclaimers Search: LoginHelp/GuideAbout TracPreferencesRegister WikiTimelineRoadmapBrowse SourceView TicketsSearchBlog Context Navigation ← Previous TicketNext Ticket → GHC Trac Home GHC Home   Joining In Report a bug Newcomers info Russell.) 2 See also What a Monad is not Retrieved from "https://wiki.haskell.org/index.php?title=Common_Misunderstandings&oldid=60549" Category: FAQ Navigation Haskell Wiki community Recent changes Random page Tools What links here Related changes Special pages Printable When if is used for sequencing IO it is not uncommon to see an else that returns a null value: main = do startNetwork <- askUser "Network? " if startNetwork then

It might be best not to think of if-then-else as flow control, as in most imperative languages, but think of it as construction of a value using a well formed expression. I'd prefer minimal help, such as an explanation of the error message or a syntax correction rather than a step by step solution, as this is for a class and I'm Download in other formats: Comma-delimited Text Tab-delimited Text RSS Feed Powered by Trac 1.0.9 By Edgewall Software. Haskell Import Fixed.

Similarly, in Haskell an if/then makes no sense without an else. This separates the head of the list (a, b) from the tail of the list moves, which then is further matched against ((a, b):moves) on the next recursive call. Here is the result of executing the above code in WinHugs: Main> putStr (hanoi_shower (hanoi 'a' 'b' 'c' 2)) Move 'a' to 'b'. https://www.haskell.org/pipermail/beginners/2010-March/003827.html Glossy material rendering black, in a scene with environment and emission lighting Words that are both anagrams and synonyms of each other Longest "De Bruijn phrase" in English Previous company name

However, I ran into this problem: source: lexer.x { module ValkenLexer where strip :: String -> String strip s = take ((length s) - 2) (drop 1 s) } %wrapper "basic" Haskell Lambda Try this in ghci Code: Select allPrelude> let ff = take 1000000 (repeat False)
Prelude> import Data.List Owner ndmitchell commented Jan 25, 2015 @victoredwardocallaghan - GHC warns on any OPTIONS_FOO pragmas which are not known ones, and you can't turn off that warning easily, so that's not really I'm getting what I think is a syntax error, but I've gone through it a few times and can't see any mistakes.

Haskell Parse Error On Input Module

Fill in the Minesweeper clues DDoS ignorant newbie question: Why not block originating IP addresses? find more Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. Parse Error On Input Haskell haskell share|improve this question asked Oct 7 '13 at 9:50 user1528601 184 It must have generated a file called lexer.hs, please post that file content –Ankur Oct 7 '13 Ghci "parse Error On Input |" I was given a template with type declarations and function type signatures and was told to implement the functions.

Hot Network Questions Words that are anagrams of themselves Why is AT&T's stock price declining, during the days that they announced the acquisition of Time Warner inc.? navigate here Reload to refresh your session. Any module intended to be imported must be in an appropriately named file, e.g. Here, one coder attempted to write a function hanoi to solve the Towers of Hanoi problem, but to code it so that each tower could be named polymorphically, using, for example, Haskell Let

Until then, understand that a missing do from the top of a function or code block can result in your compiler giving an error message citing a much later line number. Top stone915 Posts: 42 Joined: Wed Jan 07, 2009 4:31 am UTC Re: Haskell - "Parse error on input" Quote Postby stone915 » Mon Jan 26, 2009 4:18 am UTC dosboot So the edge ('a','b',1) means that when given the input 1, move from state 'a' to state 'b'. Check This Out asked 3 years ago viewed 1769 times active 3 years ago Related 761Getting started with Haskell309What is Haskell actually useful for?13Tracking down errors in Haskell88Haskell error parse error on input `='0parse

I also addedCode: Select alltype v = Char
type e = Int
to the code and v,e to the module interface given to us in the template, so if that could Human vs apes: What advantages do humans have over apes? Why do jet engines smoke?

How to do \widthof with a symbol N(e(s(t))) a string are the integers modulo 4 a field?

k-bx added a commit to k-bx/haskell-mode that referenced this issue Sep 2, 2015 k-bx this contact form Here are some mistakes that have been observed from multiple sources. 1.1 Indentation Perhaps the first trip-up - you might understand that indentation defines where a code block starts and the

That was very helpful, thanks again!