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Lexical Error In String/character Literal At Character

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Haskell Lexical Error At Character

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Haskell Multiline String

Haskell Error lexical error in string/character literal at character ' \r' up vote 1 down vote favorite Hello I'm trying to write a program that converts markdown to HTML, I understand there is Pandoc but my project is writing it out manually. I have it completed or at least I think i Do but I'm getting the following error Haskell Error lexical error in string/character literal at character ' \r' I have no Idea as to what is referring to, any help in pointing it out would be great. Thanks So update: I changed a few things with misc symbols and the error I get now is hs.38:17: Not in scope 'str' and as I was working through the thing it has repeatedly kept pointing at line 38 in which I cannot figure out what the issue is as it ignores the same exact thing in the previous function module Main ( convertToHTML, convertSpecialChar, main ) where import System.Environment (getArgs) import System.IO import Data.Char import Data.List import Data.List.Split eof = "" convertToHTML :: String -> String convertToHTML x = specialTags $ headings $ endings $ beginnings $ replace "---"

" x convertSpecialChar :: String -> String ConvertSpecialChar x = (convertLessThan $ convertAmpersand $ convertGreaterThan x)++eof where convertLessThan str = concat [if c =='<' then '<" else [c] | c <- str] convertAmpersand str = concat [if c == '&' then "&" else [c] | c <- str] convertGreaterThan str = concat [if c =='>' then ">" else [c] | c <- str] beginnings :: String -> String beginnings str = unwords $ map tag ch where tag x | isPrefixOf "**" x = "" ++ (tail $ tail x) | isPrefixOf "__" x = "" ++ (tail $ tail x) | isPrefixOf "_" x = "" ++ (tail x) | isPrefixOf "*" x = "" ++ (tail x) | isPrefixOf "^" x = "

" ++ (tail x) | isPrefixOf "---" x = replace "---" "

" | otherwise = x ch =splitOn " " str replace :: Eq a => [a] -> [a] -> [a] -> [a] replace old new x = intercalate new (splitOn old x) endings :: String -> String endings str = unwords $ map tag ch where tag x | isInfixOf "**" x = replace "*

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Lexical error in Haskell when concatenating strings up vote 1 down vote favorite I am trying to insert a character ('A') http://stackoverflow.com/questions/27329771/haskell-error-lexical-error-in-string-character-literal-at-character-r into a string in Haskell my code is as follows: split :: Int -> String -> String split n s |s == [] = s |otherwise = let (a,b) = splitAt n s in “A” ++ split n b However, it keeps throwing up " lexical error at character '\8220' " on the otherwise line. Im new to Haskell and any help would be much appreciated. string haskell concatenation lexical share|improve this question asked http://stackoverflow.com/questions/27254555/lexical-error-in-haskell-when-concatenating-strings Dec 2 '14 at 16:43 BenJacob 305316 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted Change “ to". It's a different Unicode character. You have “ which is left double quation mark while the standard lexical element is the simple quotation mark (") Also, since you're adding a single letter, you can also use 'A' : split n b share|improve this answer answered Dec 2 '14 at 16:54 Mihai Maruseac 13.8k63498 add a comment| 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 Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged string haskell concatenation lexical or ask your own question. asked 1 year ago viewed 505 times active 1 year ago Related 3804What is the difference between String and string in C#?289String concatenation: concat() vs + operator414C++ concatenate string and int550StringBuilder vs String concatenation in toString() in Java5253How to check if one string contains another substring in JavaScript?172Python String and Integer concatenation5Haskell: lexical error in string/character literal at character 'i'1How to concatenate Integers as Strings in H

Lists & IRC The GHC Team   Documentation GHC Status Info Building Guide Working conventions Commentary Debugging Infrastructure   View Tickets My Tickets Tickets I Created By Milestone By OS By Architecture Patches for review   Create https://ghc.haskell.org/trac/ghc/ticket/8524 Ticket New Bug New Task New Feature Req   Wiki Title Index Recent Changes Wiki Notes Opened 3 years ago Last modified 6 months ago #8524 new bug GHC is inconsistent with the Haskell Report on which Unicode characters are allowed in string and character literals Reported by: oerjan Owned by: Priority: low Milestone: Component: Compiler (Parser) Version: 7.6.3 Keywords: unicode Cc: lexical error hvr Operating System: Unknown/Multiple Architecture: Unknown/Multiple Type of failure: GHC rejects valid program Test Case: Blocked By: Blocking: Related Tickets: Differential Rev(s): ​Phab:D1235 Wiki Page: Description GHC is inconsistent with the Haskell Report on which Unicode characters are allowed in string and character literals. (And I don't like either option, why leave out any characters in strings unnecessarily?) Examples from ghci 7.6.3 (also haskell lexical error tested in lambdabot on irc): Prelude> "​" -- Unicode char \8203, Format class. :10:2: lexical error in string/character literal at character '\8203' Prelude> " " -- Unicode char \8202, Space class. "\8202" Prelude> "t\ \est" -- Unicode char \8202 in a string gap. :14:4: lexical error in string/character literal at character '\8202' My reading of ​http://www.haskell.org/onlinereport/haskell2010/haskellch2.html (section 2.2 and 2.6): The report BNF token "graphic", which can be used in literals, includes indirectly many Unicode classes, but uniWhite is not one of them. Thus the only Unicode whitespace allowed to represent itself in literals is ASCII space. Unicode formatting characters are not mentioned in the BNF that I can see, so are not allowed in literals. String gaps are made out of the report BNF token whitespace, which does include uniWhite. Who wants what: GHC Report Me Format in string No No Yes Space/uniWhite in string Yes No Yes Space/uniWhite in string gap No Yes Dunno In short, GHC's behavior is buggy and/or annoying in two opposite ways: It leaves out some Unicode characters as allowable in strings and character literals, presumably because the report says so. It allo

 

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