---
name: "hoogle"
section: "1"
platform: "linux"
package: "hoogle"
version: "5.0.18.4+dfsg1-1+b3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/hoogle"
---

# hoogle(1)

A Haskell API search engine.

## NAME

hoogle - A Haskell API search engine.

## SYNOPSIS

**hoogle** EXPRESSION\|COMMAND \[OPTIONS\]

## DESCRIPTION

Hoogle is a Haskell API search engine which allows you to search Haskell libraries by either function name, or by approximate type signature.

Example searches with EXPRESSION:

```
    map
    (a -> b) -> [a] -> [b]
    Ord a => [a] -> [a]
    Data.Map.insert
```

The Hoogle manual (http://www.haskell.org/haskellwiki/Hoogle) contains more details, including further details on search queries, how to install Hoogle as a command line application and how to integrate Hoogle with Firefox/Emacs/Vim etc.

This program also has some command for special usage.

### Command reference:

- **search**

  Perform a search

- **generate**

  Generate Hoogle databases

- **server**

  Start a Hoogle server

- **replay**

  Replay a log file

- **test**

  Run the test suite

### Option reference:

- **-**?, **--help**

  Display help message

- **-V,--version**

  Print version information

- **--numeric-version**

  Print just the version number

- **-v**, **--verbose**

  Loud verbosity

- **-q**, **--quiet**

  Quiet verbosity

## AUTHOR

The text for this page was constructed from the Hoogle search engine's web page and written by Erik de Castro Lopo \<erikd@mega-nerd.com\> and Kiwamu Okabe \<kiwamu@debian.or.jp\>, for the Debian GNU/Linux system (but may be used by others).

## SEE ALSO

[haddock(1)](/haddock/1.md), [update-hoogle(8)](/update-hoogle/8.md)