SISC 1.5.1 Released

7/5/2006: SISC 1.15.1 Released

New in this Release
-------------------

SISC 1.15.1 brings to the table improvements in debugging,
including a stack-tracer which can track call chains despite
proper tail recursion, and more descriptive error reporting
throughout.  In addition, there are minor functionality
additions, including support for new SRFIs.

* Support for a tail-recursion compatible stack traces
* Improved most debugging messages and reduced unnecessary
  information.
* Added functions to inspect and modify breakpoint arguments, and
  to obtain breakpoint continuations. 
* Support for SSL and TLS sockets.
* Support for SRFIs 59, 66, and 78.
* Several bugfixes and minor improvements.

About SISC
----------

SISC is an extensible heap-based interpreter of Scheme running on
the Java VM, with an aggressively optimized, lightweight (<200k)
Scheme engine.  SISC outperforms all existing Java
interpreters (often by more than an order of magnitude), and is
competitive with interpreters in any language.

In addition, SISC is a complete implementation of the language.
The entire R5RS Scheme standard is supported, without exception.  
This includes a full number tower including complex number support,
arbitrary precision integers and floating point numbers, as well as
hygienic R5RS macros, proper tail recursion, and first-class
serializable continuations (not just the escaping continuations as 
in many limited Scheme systems).  SISC also attempts to implement the
standard as correctly as possible, while still providing
exceptional performance.

Finally, SISC provides many useful real-world extensions, such as
networking, threading, elegant exception handling, generic
procedures, an object system, SLIB and comprehensive SRFI support, a
scope-friendly module system, a Scheme and Java object system 
with a clean foreign-function interface and more.


Downloads and More Information
------------------------------

Source code, binaries, and SISC documentation can be found on 
the web at:

    http://sisc.sourceforge.net


Special Thanks
--------------

Thanks go out to the following people who contributed to
this release:

Marco Bakera
Dominique Boucher
Tony Garnock-Jones
Edward Martin
Dan Muresan

Licensing
---------

SISC is Free Software.  It is released simultaneously under the GNU
General Public License (for free-software projects), and the Mozilla
Public License (for commercial entities).  The documentation is
available under the GPL.


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