Consider the usage of these different parser combinators. import Control.Applicative.Combinators import Text.Regex.Applicative main :: IO () main = do let parser1 = sym '"' *> manyTill a...

I am wondered why there is no generalized parser combinators for Bottom-up parsing in Haskell like a Parsec combinators for top down parsing. ( I could find some research work went during 2004 but...

I was reading a lot about Haskell Parser Combinators and found a lot of topics like: Parsec vs Yacc/Bison/Antlr: Why and when to use Parsec? Which Haskell parsing technology is most pleasant to u...

Well in fact I'm pretty sure I'm using the wrong terminology. Here is the problem I want to solve: a parser for the markdown format, well a subset of it. My problem is with the blockquote feature....

I'd like to understand why this simple parser runs out of memory for large files. I'm really clueless what am I doing wrong. import Data.Attoparsec.ByteString.Char8 import qualified Data.Attopars...

I'm trying to parse a string that can contain escaped characters, here's an example: import qualified Data.Text as T exampleParser :: Parser T.Text exampleParser = T.pack <$> many (char '\\...

Background I've written a logfile parser using attoparsec. All my smaller parsers succeed, as does the composed final parser. I've confirmed this with tests. But I'm stumbling over performing oper...

I'm trying to write code to perform the following simple task in Haskell: looking up the etymologies of words using this dictionary, stored as a large tsv file (http://www1.icsi.berkeley.edu/~demel...

I'm using Attoparsec, and I would like to track a user state value throughout a parsing task. I'm familiar with the monadic functions getState, putState, and modifyState of Parsec, but I can't see...

I have written a following parsing code using attoparsec: data Test = Test { a :: Int, b :: Int } deriving (Show) testParser :: Parser Test testParser = do a <- decimal tab b <- decim...

Karva notation is used in Gene Expression Programming to represent mathematical expressions. See here http://www.gene-expression-programming.com/Tutorial002.asp You create an expression tree by ...

I'm trying to augment Haskell's Attoparsec parser library with a function takeRegex :: Regex -> Parser ByteString using one of the regexp implementations. (Motivation: Good regex libraries c...

I have to parse some files and convert them to some predefined datatypes. Haskell seems to be providing two packages for that: attoparsec parsec What is the difference between the two of them ...

I'm a little confused by this behaviour of attoparsec. $ ghci > :m Data.Attoparsec.Text > :m + Data.Text > parse (string (pack "module")) (pack "mox") Partial _ > parse (string (pack "...

Working on my app I've stumbled into a problem of Aeson not decoding UTF8 input. Digging deeper I found out that it relies on Parser ByteString of Attoparsec, which seems to be the source of the pr...

I wrote a quick attoparsec parser to walk an aspx file and drop all the style attributes, and it's working fine except for one piece of it where I can't figure out how to make it succeed on matchin...

I wanted, just to learn a bit about Iteratees, reimplement a simple parser I made, using Data.Iteratee and Data.Attoparsec.Iteratee. I'm pretty much stumped though. Below I have a simple example th...

So I am writing a packet sniffing app. Basically I wanted it to sniff for tcp sessions, and then parse them to see if they are http, and if they are, and if they have the right content type, etc, s...

I am converting some functioning Haskell code that uses Parsec to instead use Attoparsec in the hope of getting better performance. I have made the changes and everything compiles but my parser doe...