normalization-by-evaluation
Relational normalization-by-evaluation (nbe) in miniKanren/alphaKanren.
The Scheme, miniKanren, and alphaKanren code is based on Edward Kmett's (non-relational) Haskell code, presented to Will Byrd during a mini-tutorial on nbe.
This repository includes the code from Michael Ballyntyne's 'faster-miniKanren' repo--please see the 'faster-miniKanren/LICENSE' file for the license for that code. For all other code in this repository, please see the 'LICENSE' file in the top-level directory of this repository.
Thank you to Michael Arntzenius for a previous tutorial on normalization-by-evaluation, and a separate attempt at implementing normalization-by-evaluation relationally.
Thanks to Nada Amin for suggesting improved file names.
Code in this repository:
original-edward-kmett-code
N.hs (nbe for untyped call-by-value lambda-calculus in Haskell, from Edward Kmett's mini-tutorial for Will Byrd)
N1.hs (nbe for typed call-by-value lambda-calculus in Haskell, from Edward Kmett's mini-tutorial for Will Byrd)
scheme-version
nbe.scm (Will Byrd's translation of N.hs into Scheme, using the pmatch pattern matcher; tested under Chez Scheme)
pmatch.scm (Oleg Kiselyov's simple pattern matcher, implemented using continuation-passing macros)
miniKanren-version
nve.scm (Will Byrd's translation of nbe.scm into miniKanren; tested under Chez Scheme)
faster-miniKanren (Michael Ballantyne's implementation of faster-miniKanren)
alphaKanren-version
nbe.scm (Will Byrd's translation of miniKanren nbe.scm into alphaKanren; tested under Chez Scheme)
nbe-tests.scm (Will Byrd's tests for the alphaKanren version of nbe.scm; tested under Chez Scheme)
alphaKanren (Dan Friedman and Will Byrd's implementation of alphaKanren)
scheme-helpers (helper code that might be useful in multiple Scheme-related directories)
test-macro.scm (Simple test macro, adapted from Oleg Kislyov's test macro used in the original Kanren)
Useful tutorials on normalization-by-evaluation:
'Checking Dependent Types with Normalization by Evaluation: A Tutorial' by David Thrane Christiansen