Paco

Parse everything with Elixir

Paco is a monadic parser combinator library written in Elixir. Goals:

• Be easy to learn and easy to use
• Allows to create powerful, understandable and maintainable parsers
• Allows to quickly create complex parsers starting from tons of reusable parsers
• Have the best error reporting ever seen
• Be testable and introspectable
• Easy things should be trivial, hard things should be possible
• Correctness over usability (no corners cut, no special cases)
• Usability over features (no black magic)
• Features over performance (developers time is more important)
• Be as fast as possible

WARNING: This is a work in progress, is not ready for use, so don't use it yet.

Example

defmodule Expression do
  use Paco

  parser expression do
    one_of([number, expression]) |> separated_by(",") |> surrounded_by("(", ")")
  end
end

Expression.parse("(7, (4, 5), (1, 2, 3), 6)") # => [7, [4, 5], [1, 2, 3], 6]