Don’t need to import Foundation.
Add a target for λ.
Extract REPL stuff into its own file.
Rearrange a bit.
Literals return labelled functions.
Character set parsers.
Add Parsing, Either, and Box to the lambda target.
Add a grammar & terms for the lambda calculus.
Lambda calculus has a repl.
Note about a radar that needs filing.
Yay we can sorta print stuff in the debugger.
Much less agonizing character set parsing.
Fixpoints for fixing cyclic grammars.
Parse left-recursively, and thus infinite loop.
Merge pull request #2 from robrix/λ

λ