Picrin is a lightweight R7RS scheme implementation written in pure C89. It contains a reasonably fast VM, an improved hygienic macro system, usuful 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
Currently picrin is hosted on Github. You can freely send a bug report or pull-request, and fork the repository.
There is a chat room on chat.freenode.org, channel #picrin. IRC logs here: https://botbot.me/freenode/picrin/
Copyright (c) 2013-2014 Yuichi Nishiwaki and other picrin contributors
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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