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1.0 Beta 3

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Downloads: 104
Released: Apr 27, 2009
Updated: Apr 27, 2009 by leppie
Dev status: Beta Help Icon

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Release Notes

Release notes for IronScheme 1.0 Beta 3

What is IronScheme?

IronScheme will aim to be a conforming R6RS Scheme implementation on the Microsoft DLR.
IronScheme provides 2 run modes: either via direct invocation on the commandline or via a REPL interactive environment.
IronScheme can also used an embedded scripting library in your .NET programs.
With 1.0 beta 3, IronScheme implements the entire R6RS Scheme standard, and only fail 6 of 8871 tests in the PLT R6RS test suite.
IronScheme runs on MS .NET and Mono. Unfortunately, it does not seem to work under 64bit on Mono.

Notably lacking for R6RS

  • call/cc only supports escape continuations, trying to re-invoke a continuation will result in an error
  • during development of beta 2, I made a CPS version, but is too slow to be useful currently, this will be addressed in IronScheme 2.0


  • all raise's are continuable in the sense they can be caught (this is also addressed with the CPS version)


  • a generic load procedure for toplevel R6RS files
  • many extras procedures and macros in (ironscheme) library, mostly provided by psyntax
  • syntactic CLR integration, automatic conversion of closures into delegates


  • Abdulaziz Ghuloum and Kent Dybvig for psyntax (and friends) (and equal?)
  • Marc Feeley for pretty-print
  • anyone else I missed

Planned to-do's (before final release)

  • testing of anything else
  • any additional CLR integration required
  • documentation

Updated (fixed/new)

  • Converted a substantial part of code still written in C# into Scheme
  • Some minor compiler optimizations
  • Improvements with exactness of numbers
  • Added -I switch for extra library search paths
  • Added -emacs switch to let the REPL behave better as a subprocess (as well as auto-detection of this)
  • Added extensions library for easy calling from .NET
  • Added remoting library (connects with REPL)
  • See 'Source Code' page for more details

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