Hoogle

Hoogle is a Haskell API search engine. It allows you to search by either name, or by approximate type signature. The standard web interface to Hoogle is available at http://www.haskell.org/hoogle/.

Using Hoogle

There are several ways to interact with hoogle, pick which one works best for you:

• The web interface: http://www.haskell.org/hoogle/.
• The LambdaBot plugin, active on Haskell IRC, using @hoogle and @hoogle+
• The command line version

People have also combined Hoogle to create more comprehensive documentation for projects, see for example the darcs API docs.

Related Work

• Mikael Rittri, Using types as search keys in function libraries, Retrieving library identifiers via equational matching of types plus a few others.
• Colin Runciman and Ian Toyn, Retrieving re-usable software components by polymorphic type.
• Roberto Di Cosmo, Isomorphisms of Types: from Lambda Calculus to Information Retrieval and Language Design.

Downloads

• Released version
  • Hoogle Manual (wiki) (bibtex)(hide bibtex)
    @manual{mitchell:hoogle_manual
        ,title          = "Hoogle Manual (wiki)"
        ,author         = "Neil Mitchell"
        ,url            = "\verb'http://www.haskell.org/haskellwiki/Hoogle'"
    }
    
  • darcs get --partial http://code.haskell.org/hoogle
  • Bug tracker
• Related blog posts
• Hoogle Overview - from The Monad.Reader (abstract)(hide abstract)
  This article gives an overview of the Hoogle tool. We describe the history of Hoogle, the improvements that have been made this summer, and plans for future features. Finally, we discuss the design guidelines of Hoogle 4 - which may be of interest both to budding Hoogle developers and other Haskell projects. This article does not cover the theoretical background of Hoogle.
  (bibtex)(hide bibtex)
  @article{mitchell:hoogle_2008_11_19
      ,title          = "Hoogle Overview"
      ,author         = "Neil Mitchell"
      ,year           = "2008"
      ,month          = "November"
      ,day            = "19"
      ,journal        = "The Monad.Reader"
      ,number         = "12"
      ,pages          = "27--35"
      ,url            = "\verb'http://community.haskell.org/~ndm/downloads/paper-hoogle_overview-19_nov_2008.pdf'"
  }
  
• Hoogle: Fast Type Searching - from AngloHaskell 2008 (bibtex)(hide bibtex)
  @misc{mitchell:hoogle_2008_8_9
      ,title          = "Hoogle: Fast Type Searching"
      ,author         = "Neil Mitchell"
      ,year           = "2008"
      ,month          = "August"
      ,day            = "9"
      ,note           = "Presentation from AngloHaskell 2008"
      ,url            = "\verb'http://community.haskell.org/~ndm/downloads/slides-hoogle_fast_type_searching-09_aug_2008.pdf'"
  }
  
  • Hoogle: Fast Type Searching
• Hoogle - from PLASMA (bibtex)(hide bibtex)
  @misc{mitchell:hoogle_2005_12_8
      ,title          = "Hoogle"
      ,author         = "Neil Mitchell"
      ,year           = "2005"
      ,month          = "December"
      ,day            = "8"
      ,note           = "Presentation from PLASMA"
      ,url            = "\verb'http://community.haskell.org/~ndm/downloads/slides-hoogle-08_dec_2005.pdf'"
  }
  

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