https://github.com/alandipert/shave

a wannabe lisp interpreter
https://github.com/alandipert/shave

Last synced: about 2 months ago
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a wannabe lisp interpreter

• Host: GitHub
• URL: https://github.com/alandipert/shave
• Owner: alandipert
• Created: 2009-07-02T10:32:54.000Z (almost 15 years ago)
• Default Branch: master
• Last Pushed: 2009-07-02T10:52:24.000Z (almost 15 years ago)
• Last Synced: 2024-01-28T05:04:33.201Z (5 months ago)
• Language: C
• Homepage:
• Size: 84 KB
• Stars: 2
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README

Lists

• AwesomeInterpreter - shave

README

        
shave

This is the beginnings of a LISP interpreter.  It's kind of full of garbage right now, because I got impatient and started copy-pasting.  The lexer is handwritten, so yeah, it rules.  The generated AST is a big linked list, which is evaluated in the eval step.  The AST is made up of 'Token' structs, which have type and property enums used by the eval routines.

My end goal here is to make the cleanest, smallest, and simplest implementation of LISP that would handle the recursive computation of a factorial:

 (defun factorial (n)

     (if (<= n 1)

             1

          (* n (factorial (- n 1)))))

There's a ways to go; namely cleanup and implementing defun.

compile:

  $ make

use:

  $ ./shave

  shave.

  > (if (> 3 2) (/ 9 (+ 3 2)))

  list:

    if:

    list:

      >:

      atom: 3

      atom: 2

    list:

      /:

      atom: 9

      list:

        +:

        atom: 3

        atom: 2

  atom: 1.8