Category Archives: projects

Typeclassopedia v2: moving my efforts to the Haskell wiki

I said back in April that I was going to be working on a second edition of the Typeclassopedia. Since then I have worked on it some, but mostly I’ve dithered trying to work out a toolchain for publishing it … Continue reading

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Generating plane tilings with diagrams

I’ve finally set up a diagrams-contrib package to serve as a home for user contributions to the diagrams project—generation of specialized diagrams, fun or instructive examples, half-baked ideas, stuff which is not sufficiently polished or general to go in the … Continue reading

Posted in diagrams, haskell, math, projects | Tagged , , | 1 Comment

Announcing diagrams-0.4

I am pleased to announce the release of version 0.4 of diagrams, a full-featured framework and embedded domain-specific language for declarative drawing. The last announcement was of the 0.1 release; there have been quite a few changes and improvements since … Continue reading

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Effective parse tree support for the working semanticist

If, like me, you spend large amounts of time designing, discussing, and proving things about programming languages and formal calculi, chances are you have used Ott (and if you do, but you haven’t, you are really missing out). You write … Continue reading

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diagrams repos now mirrored on github!

I was quite excited when I learned that Owen Stephens was working on a two-way darcs-git bridge for his Google Summer of Code project. You see, I’m one of those holdouts who, despite acknowledging that github is pretty cool and … Continue reading

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Unbound now supports “set” binders and GADTs

I have just uploaded version 0.3 of the Unbound library (and version 0.5 of RepLib). This version adds support for two major new features: The new permbind and setbind functions create binders that are alpha-equivalent “up to permutation”. For example, … Continue reading

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Good toolchain for writing a user manual?

It’s time to start writing a user manual for diagrams. Haddock documentation is great when you have only, say, forgotten the type of the frobnitz function. However, it is woefully inadequate when you are just trying to figure out how … Continue reading

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