Using Parsec to parse regular expressions - Stack Overflow 13 You should use Parsec Expr buildExprParser; it is ideal for this purpose You simply describe your operators, their precedence and associativity, and how to parse an atom, and the combinator builds the parser for you! You probably also want to add the ability to group terms with parens so that you can apply * to more than just a single literal
Simply using parsec in python - Stack Overflow The design of parsec requires a Parser to act independently on an input stream without knowledge of any other Parser To do this effectively a Parser must manage an index position of the input string
Parsec: difference between try and lookAhead? The combinators try and lookAhead are similar in that they both let Parsec "rewind", but they apply in different circumstances In particular, try rewinds failure while lookAhead rewinds success
parsing - Parsec `try` should backtrack - Stack Overflow Isn't Parsec's try supposed to backtrack when it encounters failure? For instance, if I have the code import Control Applicative (( lt;| gt;)) import Debug Trace import Text Parsec (try) import Text
ghc error: hidden package, but its actually exposed parsec-3 1 14 0 is not the same package as parsec-3 1 13 0 Something else is going on How did you install the package? What environment are you running ghc in? What's the full output of ghc-pkg list?
haskell - Using Parsec with Data. Text - Stack Overflow 37 Using Parsec 3 1, it is possible to parse several types of inputs: [Char] with Text Parsec String Data ByteString with Text Parsec ByteString Data ByteString Lazy with Text Parsec ByteString Lazy I don't see anything for the Data Text module I want to parse Unicode content without suffering from the String inefficiencies
Newest parsec Questions - Stack Overflow Parsec is an industrial strength, monadic parser combinator library for Haskell Sign up to watch this tag and see more personalized content
haskell - Parsec: Consume all input - Stack Overflow One common problem I have with Parsec is that it tends to ignore invalid input if it occurs in the "right" place As a concrete example, suppose we have integer :: Parser Int, and I write express