Implementing a Functional Language: Parsing Core

This is an appendix to a series in implementing a functional language. The introduction is here. This is a literate Haskell file - you can download the source here. To load it into GHCi and play around, you can use the following command (you’ll need the source for the Core.Language module as well):

stack --resolver lts-12.2         \
      ghci --package megaparsec   \
           --package text         \
      2019-03-03-parsing-core.lhs \
      2019-03-03-the-core-language.lhs

module Core.Parse (parser, parseTest) where
import Core.Language
import Text.Megaparsec

This module exports two functions: parser and parseTest. parser is the parser for our language. We can pass it to functions like Text.Megaparsec.Parse to parse input into a Core.CoreProgram. parseTest is a convenience function that will take a String as input and produce a Core.CoreProgram, throwing an error if the parse fails.

parser = error "Not implemented yet!"

parseTest = error "Not implemented yet!"