Turnstile+

A Racket-based framework for creating extensible and reusable typed languages.

• create typed (Racket #lang) DSLs (in the same way as plain #langs)
• prototype new type system features, modularly

Installation

(Requires Racket v7.0 or later.)

Install Option 1: Via Racket package server

raco pkg install --auto turnstile

Install Option 2: Manual

1. clone the repo
2. cd into repo root dir
3. raco pkg install --auto macrotypes-lib/ turnstile-lib/

Examples and Tests

1. Install the examples and tests (skip this step if installed via package server):

raco pkg install --auto rackunit-macrotypes-lib/ turnstile-example/ turnstile-test/

2. Run the test suite: raco test --drdr -p turnstile-test

Other notes

• additional tests and examples using the core types-as-macros (i.e., non-Turnstile) API:
  • install: raco pkg install --auto macrotypes-example/ rackunit-macrotypes-lib/ macrotypes-test/
  • run: raco test --drdr -p macrotypes-test
• POPL 2020: [paper] [artifact] [code] [Cur (an extensible proof assistant created with Turnstile+)]
• POPL 2017: [paper] [artifact] [code]