hat-2.04 -------- http://haskell.org/hat/ We are pleased to announce a new release of Hat, the Haskell Tracer. Hat is a very useful tool for understanding and debugging programs. Hat is compiler independent, and can be used on any Unix-like platform. It supports the full Haskell'98 language, plus hierarchical module namespaces, and several type system extensions, namely: multi-parameter type classes, functional dependencies, and existential quantification of datatype declarations. The main interactive trace browsers currently are hat-observe and hat-trail, but many more experimental browsers are included (see below). Particular features of note in this new release, hat-2.04, are: * Supports compilers from ghc-5.04.2 and nhc98-1.18 upwards, now including the entire ghc-6 series. As well as the usual Unix/Linux platforms, we believe it also works under MacOS X and Cygwin (but would value your feedback.) We recommend you use 'hmake' to manage compilation of your traced programs. * Support for a few more of the standard hierarchical library modules (although the tracing versions are still only a subset of the full list.) * Various improvements, such as recording full source positions in the trace rather than just start-positions, and recording do-notation, mean that visual linkage from the trace to your program is far more helpful. * A range of new (experimental) tracing tools: Interactive browsers: hat-anim, hat-explore, hat-detect Batch-mode tools: hat-cover, hat-nonterm, black-hat * Numerous small bug fixes. See the website http://haskell.org/hat/ for full details. There is a dedicated mailing list for bug-reports and other discussion of Hat: http://www.haskell.org/mailman/listinfo/hat Regards, The Hat team [ The core Hat team currently consists of Olaf Chitil, Colin Runciman, and Malcolm Wallace with thanks to many other students, visitors, collaborators and reviewers. The original development of Hat was funded by EPSRC grant number GR/M81953, with later additional support from the Universities of York, Kent, Aachen, and Microsoft Research (Cambridge). ]