For the last week or so, ozy` has been working on improving the haskell bundle in TextMate. He's done a lot of work, and it really makes a difference. The changes should be in SVN sometime soon I hope.

Changelist

• Fixed regex for backquote-infix notation
• Added highlighting for unit () and empty list []
• Fixed up module, class, import, and instance declarations. In particular, some non-reserved words that are only meaningful in the above contexts are highlighted appropriately.
• Added highlighting for all operators.
• Changed scope selectors for some varSyms that were previously highlighted as "punctuation.separator." This scope is not highlighted by many themes.
• Added highlighting for numeric constants. Floats and integrals have separate scope selectors.
• Changed scope selectors for some things like pragma syntax.
• Fixed minor errors in regexes that highlight function names.
• Modularized a lot of patterns. (There's still a lot to be done here.)
• Added highlighting for Prelude type names and constructors. This is scope aware, in the sense that (eg.) Maybe only gets special treatment in the context of a type signature. (This is incomplete, though.)
• Added highlighting for commas. At the moment this is utterly useless.
• Fixed some dumb issues where pragmas would only be scoped as such if they appeared inside a block comment.
• Highlighted a couple of pragma directives. (Incomplete.)
• Fixed up the type signature scope a little bit. (Not much.)

I've been using the changes while he's been working on them, and they certainly do make the code look quite a bit better. I'll be happy when haskell is a first class language in TextMate, and this is the first big step in getting it there. Hooray!

~ Axman