Implementations

• derp-old: Original implementation of derivative-based parsing for Racket
• derp-latest.tar.gz: Latest Racket implementation of derp. (Includes small test grammars.) [This is the canonical, supported implementation of derp.]
• derp on hackage: derivative-based parsing for Haskell
• Parser.scala: an unmaintained implementation in Scala

Tests

• python-tests.tar.gz: test inputs (pre-lexed) and a Python grammar for derp