Awesome

The project is in hiatus and being archived soon...

Picrin is a lightweight R7RS scheme implementation written in pure C89. It contains a reasonably fast VM, an improved hygienic macro system, useful contribution libraries, and simple but powerful C interface.

R7RS compatible
Reentrant design (all VM states are stored in single global state object)
Bytecode interpreter
Direct threaded VM
Internal representation by nan-boxing (available only on x64)
Conservative call/cc implementation (VM stack and native c stack can interleave)
Exact GC (simple mark and sweep, partially reference count)
String representation by rope
Hygienic macro transformers (syntactic closures, explicit and implicit renaming macros)
Extended library syntax

Documentation

See http://picrin.readthedocs.org/

Homepage

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

https://github.com/picrin-scheme/picrin

Build

Just type make in the project root directory. You will find an executable binary newly created at bin/ directory.

$ make

When you are building picrin on x86_64 system, PIC_NAN_BOXING flag is automatically turned on (see include/picrin/config.h for detail).

Install

make install target is provided. By default it installs picrin binary into /usr/local/bin/.

$ make install

Since picrin does not use autoconf, if you want to specify the install directory, pass the custom path to make via command line argument.

$ make install prefix=/path/to/dir

Requirement

To build Picrin Scheme from source code, some external libraries are required:

perl
regex.h of POSIX.1
libedit (optional)

Make command automatically turns on optional libraries if available. Picrin is mainly developed on Mac OS X and only tested on OS X or Ubuntu 14.04+. When you tried to run picrin on other platforms and found something was wrong with it, please send us an issue.

Authors

See AUTHORS