Version 26 of Muddy Scheme

Updated 2010-01-19 11:46:34 by pmarin

Author: pmarin
Please add content only in the Comments, Bugs or News section.

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Introduction

Muddy Scheme is an implementation of the Scheme language in Tcl.

This interpreter tries to follow the awesome "Scheme from Scratch" articles written by Peter Michaux.

Features

  • Procedures
    • define
    • lambda
    • begin
    • Lexically scoped variables
    • Proper tail calls
  • Types
    • integers
    • characters
    • pairs
    • strings
    • booleans
  • Primitives
    • Type of Predicates
      • null?
      • boolean?
      • symbol?
      • number?
      • integer?
      • zero?
      • char?
      • string?
      • pair?
      • procedure?
    • Type conversions
      • char->integer
      • integer->char
      • number->string
      • string->number
      • symbol->string
      • string->symbol
    • Working with integers
      • +
      • -
      • *
      • quotient
      • remainder
      • =
      • <
      • >
    • Working with pair and list
      • cons
      • car
      • cdr
      • set-car!
      • set-cdr!
    • Others
      • exit
      • quit (return to tclsh if you sourced muddy.tcl)

Requirements

Muddy Scheme needs Tcl8.6 and tcllib (struct::stack)

Install

The Github page is: http://github.com/pmarin/Muddy-Scheme
You can get the code with:

    $ git clone git://github.com/pmarin/Muddy-Scheme.git

Example of use

    $ muddy.tcl
    Welcome to Muddy Scheme, Copyright (c) 2010 Franciso José Marín Pérez
    Use ctrl-c to exit.

    > #t
    #t
    > -123
    123
    > #\c
    #\c
    > "asdf"
    "asdf"
    > (quote ())
    ()
    > (quote (0 . 1))
    (0 . 1)
    > (quote (0 1 2 3))
    (0 1 2 3)
    > (quote asdf)
    asdf
    > (define a 1)
    ok
    > a
    1
    > (set! a 2)
    ok
    > a
    2
    > (if #t 1 2)
    1
    > (+ 1 2 3)
    6
    > + 
    #<primitive>
    >^c
    $

Bugs

(2010-1-19) - A bug in the reader when Muddy is reading from a pipe (echo "#t" | muddy.tcl), probably becouse I am not testing the end of file properly.

News

(2010-1-18) Muddy is compliant with bootstrap-scheme v0.14. I need to fix bugs in the reader.

Accumulator Generator:

    >(define (foo n) 
       (lambda (i) 
          (set! n (+ n i)) n))
    >(define acc (foo 3))
    ok
    > (acc 1)
    4
    > (acc 1)
    5 
    > (acc 10)
    15
    > (acc 0)
    15

(2010-1-17) Muddy is compliant with bootstrap-scheme v0.12
(2010-1-16) Currently the code is compliant with bootstrap-scheme v0.11

License

MIT License
I give permission to wiki users to copy & paste the code in this wiki.

Comments

pmarin. Enjoy!!!