This product is developed at the second-grade course, Informatic Science
Basic Experiment class at the University of Tokyo.

Picrin - a lightweight scheme interpreter

Features

• R7RS compatibility (but partial support)
• reentrant design (all VM states are stored in single global state object)
• bytecode interpreter (based on Stack VM technology)
• direct threaded VM
• Internal representation by Nan-Boxing
• conservative call/cc implementation (users can freely interleave native stack with VM stack)
• exact GC (simple mark and sweep strategy)
• advanced REPL support (multi-line input, etc)
• tiny & portable library (all functions will be in libpicrin.so)

Homepage

Currently picrin is hosted on Github. You can freely send a bug report or pull-request, and fork the repository.

https://github.com/wasabiz/picrin

How to use it

• build

    $ make build
  

  built executable binary will be under bin/ directory and shared library libpicrin.so under lib/.

• run

  Simply directly run the binary bin/picrin from terminal, or you can use make to execute it like this.

    $ make run
  

In the default option, when make command is called without arguments, it builds the binary and right after that dropped into the picrin interactive shell (REPL).

• install

  As of now picrin does not provide a command automatically installs the binary. If you want to place picrin library and binary in a parmanent directory, please do it by hand.

Requirement

picrin scheme depends on some external libraries to build the binary:

• bison
• yacc
• make
• gcc
• readline

The compilation is tested only on Mac OSX. I think (or hope) it'll be ok to compile and run on other operating systems such as Linux or Windows, but there's no guarantee :(

Authors

Yuichi Nishiwaki (yuichi.nishiwaki at gmail.com)