https://github.com/stijlist/roots

a lisp interpreter in C
https://github.com/stijlist/roots

Last synced: about 2 months ago
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a lisp interpreter in C

• Host: GitHub
• URL: https://github.com/stijlist/roots
• Owner: stijlist
• Created: 2014-07-27T04:48:49.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2017-05-13T07:01:56.000Z (about 7 years ago)
• Last Synced: 2024-01-28T05:03:35.296Z (5 months ago)
• Language: C
• Size: 97.7 KB
• Stars: 4
• Watchers: 3
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Lists

• AwesomeInterpreter - roots

README

        
This is a toy lisp implementation loosely based on Paul Graham's [The Roots of Lisp](http://ep.yimg.com/ty/cdn/paulgraham/jmc.ps) (postscript file).

Working:

- car (head)

- cdr (tail)

- cons

- if

- quote

- atom

- eq

- let

- lambda

  - recursion

  - lexical scope

  - closures

- define (for repl only)

- integer arithmetic

  - add

  - subtract

  - multiply

  - divide

- non-alphabetical symbols

- inspect

- variadic functions

- repl works on multiline functions

- cond

- program termination with nonzero return in error cases

TODO:

- bootstrap

- strings

- garbage collection

known bugs:

Side-effects in "if" or "cond" forms don't work:

```

  (define l (quote (1 2)))

  (if (inspect (cons 3 l)) 1 0)

  (inspect l)

```

Updated testing strategy:

- input and expected output files

- shell script that executes the input files with the current version of roots and runs diff on the input and output, printing the filenames of the diffs

- git precommit hook that updates the diffs