A port of the Haskell prettyprinter library by Wadler and friends. They did a phenomenal job of documenting the API so I suggest using their docs as your primary reference.

• Rather than having annotation nodes and string nodes, I chose to have only Renderable nodes. Something is renderable if it defines a newline value, a space value, and a function for computing width (e.g. String.length). I think this is simpler, but you might disagree. It may also be less efficient. If you have thoughts on this let me know.

• paf31/purescript-pprint: Written by the boss man himself, this package defines some clean and simple document primitives but doesn't handle alternative layouts. Use this if your layout logic is fairly simple.
• paulyoung/purescript-prettier-printer: A faithful implementation of Wadler's original paper, but lacking some of the powerful extensions added by the prettyprinter package. If you don't need the extra functionality then this might be a better choice.

• Port more functionality (if necessary)
• Implement ribbon widths
• More tests
• Optimisations
• Stack safety