Parsec haskell generator#

import Text.Parsec line :: Parsec String () Double line expr < eof. You can try combine it with lookAhead and such, but that's inefficient. - Im forced to use Parsec here because of Haste. Parser combinator is a technique to implement a. Im using to parse expressions for a Javascript like language. It's not perfect for your use, however, since it discards the end value. Whats the parsec.py A universal Python parser combinator library inspired by Parsec library of Haskell. It is generally not possible to combine existing grammars into a new grammar, and it is.

Parsec haskell generator#

A parser generator reads in a description of a grammar and spits out a parser. Now, the parsec is a parser combinator library implemented in Python, providing Python developers an easy and elegant approach to build a complex but efficient parser.

The thing you're parsing seems quite complicated - it's pretty reasonable that you've run into trouble.Īnyway, what you're trying to do seems quite close to the manyTill combinator: mayTill :: Parser a -> Parser end -> Parser One of the main differences between the tools you listed, is that ANTLR, Bison and their friends are parser generators, whereas Parsec is a parser combinator library. The parsec package is a famous monadic parser combinator library in Haskell.