Lip

Lip provides powerful parser combinators for creating reusable and flexible parsers.

Why Lip?

• Easy to understand - uses intuitive combinators like keep and skip
• Compact - takes less than an hour to learn this library fully
• Flexible and composable parser combinators
• Efficient - minimal backtracking
• Built-in support for precise, located error messages
• Keep track of extra states like line number and instruction index
• Extensible - create your own combinators if needed

// Parse an (x, y) position pair
use lip::*;
let position = succeed!(|x, y| (x, y))
  .keep(int())
  .skip(token(","))
  .keep(int())
  .run("2,3", ()); // run this parser on string "2,3" without extra states
// when parsing finished, position == (2, 3)

Tutorial

Reading the parser combinator by Bodil is an excellent way to know how parser combinators work.

License

MIT

Credits

Based on Bodil's Parser Combinator Tutorial and Evan's elm/paser.