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Parse Error On Input Data

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permalinkembedsaveparentgive gold[–]otherwun 6 points7 points8 points 2 years ago*(0 children)Tabs in Haskell are canonically 8 spaces long and the different parts of a where clause must be aligned. It saves from silly errors like the one you were having. GHC 7.0.1 and later). 1.2 If / Then / Else if-then statements must always include an 'else' portion. If you have configured your editor to use a different tab width, it will mislead you. have a peek here

You can't write a Haskell file in such a way that just loading the file, will open testtext and give you the file handle. ¹ Or a list comprehension, but there In Haskell, every expression can be classified by its type. For details and our forum data attribution, retention and privacy policy, see here looking for more tutorials from you...nice work April 1, 2009 at 9:23 AM Samuel said... http://stackoverflow.com/questions/4482409/how-to-fix-parse-error-on-input-in-haskell

Ghci Define Function

This time instead of pattern matching on a String we are matching on a Bool. Type InferenceThe first thing we saw is that the compiler is able to infer the types of expressions automatically. Passing different value (link value) from VF page to VF component and display it on screen Human vs apes: What advantages do humans have over apes?

July 28, 2011 at 7:04 AM Post a Comment Older Post Home Subscribe to: Post Comments (Atom) About Me Jeremy Shaw View my complete profile Personal tools Home Log in asked 1 month ago viewed 88 times Related 761Getting started with Haskell309What is Haskell actually useful for?88Haskell error parse error on input `='0Haskell, parse error on input `)'4Haskell - parse error Move 'a' to 'c'. At each recursive step, a list of type [(a, a)] (a list of pairs) is mapped against the parameter (a, b):moves of hanoi_shower.

Notice that since a and b in (a, b) are polymorphic types, they can range over both Chars and Ints. Haskell Newtype asked 5 years ago viewed 6830 times active 3 years ago Related 494Haskell: difference between . (dot) and $ (dollar sign)761Getting started with Haskell309What is Haskell actually useful for?88Haskell error parse How do i fix this? From the Haskell 2010 Report, section "Layout": Tab stops are 8 characters apart.

more hot questions question feed lang-hs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Top stone915 Posts: 42 Joined: Wed Jan 07, 2009 4:31 am UTC Re: Haskell - "Parse error on input" Quote Postby stone915 » Tue Jan 27, 2009 3:01 am UTC Laguana In the first argument of `not', namely 'r' In the expression: (not 'r') In the definition of `test': test = (not 'r')The next three lines give us a contextual description of Join them; it only takes a minute: Sign up How to fix “parse error on input” in haskell?

Haskell Newtype

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. You can google foldl' vs foldl for some better explanations. Ghci Define Function Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Specialised Support Development & Programming Programming Talk Parse error on input Haskell layout rules specify that tab stops are 8 columns apart and that the tab character moves to the next tab stop.

There's also a standard function for what you are trying to do.Made some changes:Code: Select all-- A module for creating and handling directed graphs

module Digraph where --my 2 cents: navigate here Why is AT&T's stock price declining, during the days that they announced the acquisition of Time Warner inc.? Find the super palindromes! share|improve this answer answered Nov 7 '12 at 8:47 Alexey Romanov 70.9k14164287 add a comment| up vote 12 down vote ghci does not allow you to define types from interactive input

Join them; it only takes a minute: Sign up Haskell: parse error on input `|' up vote 0 down vote favorite I am getting this error: sky.hs:3:5: error: parse error on Freedom is measured in Stallmans. permalinkembedsaveparent[–]shakleton42 1 point2 points3 points 2 years ago(5 children)Actually, I copy - pasted that and it compiles fine for me. Check This Out After the = we have two data constructors: False and True.

How do creatures affected by Compelled Duel or Bear Totemic Attunement know who to attack? My job is to use the Digraph module to create a finite automaton. Have you - by any chance - mixed tabs and spaces?

Any help appreciated.

For example, you will can see that it implicitly added parentheses in this expression (not 'r'), and that it thinks (correctly) that 'r' is the first argument to the function not.Creating This means you have to be more disciplined with tabs vs. Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Should I boost his character level to match the rest of the group?

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 more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Please click the link in the confirmation email to activate your subscription. this contact form One example that recently (in April, 2008) appeared on the Haskell-Cafe mailing list (see the reply post Re: Embedding newlines into a string?) was the following.

Any ideas on what could be producing this error messageCode: Select allFA.hs:21:0:
Occurs check: cannot construct the infinite type: a = b -> a
When generalising the I would put the statements in individual lines usually. Idiomatic Haskell uses layout almost exclusively. Most likely to do with the "where"-clause.

I did replace the concatenation with (:) for efficiency. share|improve this answer answered Jun 27 '10 at 6:47 Amber 248k37414415 add a comment| up vote 12 down vote Just for historical reference, the HBI Haskell interactive environment allows for full Last edited by cgroza; November 15th, 2011 at 10:40 PM. I have the following code for lambda expression in haskell.

How would I simplify this summation: Select Only Printed Out Cells How do I replace and (&&) in a for loop? Does the code terminate? Problem solved. October 12, 2008 at 8:52 PM Anonymous said...

I don't think I'm going to use too many of your modifications, partly because it involves code we haven't covered in class yet and partly because I'd rather turn in code