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.
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]