# The hat package

hat-trans transforms Module.hs into Hat/Module.hs such that when the program is executed, a trace file Programname.hat is generated. Various tools (hat-trail, hat-observe, hat-explore ...) then allow viewing the trace file in different ways, to locate a bug or understand how a program works. This is the first release of Hat under Cabal. It is the least possible update to make Hat work with Cabal. Hat 2.07 works only with ghc for Haskell 98 (plus a few extensions) and the standard Haskell 98 libraries plus some Haskell 2010 libraries. Although it should build on any operating system, most viewing tools use ASCII console escape sequences and they open xterms; hence they will only work well under Unix and X11. Installation: > cabal -v install Flag -v allows you to see what is going on. Building takes a long time (one module has 25.000 lines of code). Don't worry about numerous warning messages. Use: > hat-make MyProgram.hs transforms and compiles all modules of your program and produces the tracing version Hat/MyProgram. Run your program > Hat/MyProgram which will produce trace files MyProgram.hat* Use the viewing tools to explore the trace: > hat-trail / hat-observe / hat-explore /... MyProgram There is documentation in the "docs" folder, but much of it is outdated. There are a few small programs for exploring tracing in the "examples" folder.

## Properties

Versions | 2.7.0.0, 2.7.0.1, 2.7.0.2, 2.7.0.3, 2.7.0.4, 2.7.0.5, 2.7.0.6, 2.7.0.7, 2.7.0.8, 2.7.0.9, 2.7.0.10, 2.7.0.11, 2.7.0.12, 2.8.0.0 |
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Change log | None available |

Dependencies | base (==4.5.*), bytestring (==0.9.*), containers (==0.4.*), directory (==1.1.*), haskeline (==0.6.*), old-locale (==1.0.*), old-time (==1.1.*), process (==1.1.*), random (==1.0.*) |

License | OtherLicense |

Copyright | (c) 2000-2012 Hat team |

Author | Hat team |

Maintainer | oc@kent.ac.uk |

Stability | provisional |

Category | Development |

Home page | http://www.cs.kent.ac.uk/~oc |

Bug tracker | oc@kent.ac.uk |

Source repository | head: git clone git://github.com/OlafChitil/hat.git |

Executables | hat-make, hat-delta, pretty-hat, hat-anim, hat-nonterm, black-hat, hat-cover, hat-view, hat-check, hat-detect, hat-explore, hat-stack, hat-observe, hat-trail, hat-trans |

Uploaded | Thu Oct 11 14:20:19 UTC 2012 by OlafChitil |

Distributions | NixOS:2.8.0.0 |

Downloads | 2041 total (133 in last 30 days) |

Status | Docs not available [build log] All reported builds failed as of 2015-05-30 [all 1 reports] |

## Modules

*Hat*- Hat.Array
- Hat.CPUTime
- Hat.Char
- Hat.Complex
*Control*- Hat.Control.Monad

*Data*- Hat.Data.Char
- Hat.Data.List
- Hat.Data.Maybe

- Hat.Directory
- Hat.Hack
- Hat.Hat
- Hat.IO
- Hat.Ix
- Hat.List
- Hat.Locale
- Hat.Maybe
- Hat.Monad
- Hat.Numeric
- Hat.Prelude
- Hat.PreludeBasic
- Hat.Random
- Hat.Ratio
- Hat.System
- Hat.System.Environment
- Hat.System.Exit
- Hat.System.IO

- Hat.Time

## Downloads

- hat-2.7.0.1.tar.gz [browse] (Cabal source package)
- Package description (included in the package)

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