Version 42 (modified by benl, 4 years ago)

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The Disciplined Disciple Compiler (DDC)

This is the developer's wiki for the Disciplined Disciple Compiler.

An outline of the project is at http://www.haskell.org/haskellwiki/DDC.

Our end goal is to have a light-weight functional language based on Haskell's syntax but with direct support for strict evaluation and arbitrary destructive update. These two features give the programmer better control over runtime performance than most other functional languages can offer. Our target applications are the ones that you always find yourself writing C programs for, because existing functional languages are too slow, use too much memory, or don't let you update the data that you need to.

State of Play

This section records what the DDC developers are actively working on. If you're hacking on something DDC related then by all means add yourself here. Records are dropped off if they haven't been updated for more than a month.

Ben (benl23) -- updated 10th March 2010

  • I'm currently refactoring the representation of types (in Type.Exp) to use a Data.Map to hold type constraints instead of a flat list. Along the way I'm redoing some of the more naive parts of the type inferencer, which should result in a major performance improvement. Once the representation of types has stabilised I'll be able to see about fixing #2 (checking the types of instance functions against their definitions) which is a major cause of confusing panic messages.
  • As part of that, I'm redoing the code that manages interface files. The previous setup was very hacky, and compiling a module meant totally loading all interface files for all imported modules, even in only a tiny proportion of the information was used. The new module code should be significantly cleaner and faster.

Erik de Castro Lopo (m3ga) -- updated 28th Feb 2010

  • Above all, I'm doing bug fixing. However there are still large chunks of the compiler I don't understand. These bits need Ben's attention.
  • The top of my list are bugs (in numeric order) #7 (waiting on #168), #102 and anything marked with a milestone of 0.1.3. These bugs are all deeper than the ones I've worked on previously and I'm not sure if I can make progress on these or not.

Language

Disciple versus Haskell

The Language Definition is still evolving, but the wiki should be in sync with the development branch.

Installation

Development

How you can help

  • Download out the compiler, write programs, and file bug reports!
  • Write more test programs.
  • Fix the bugs on the 0.1.3 Buglist
  • Write more quick check tests.

More Information