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[[Category:Emacs|*]]
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== Emacs tags/hasktags ==
{{Haskell infobox}}
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=== Get hasktags ===
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ETAGS allows jumping to the definition of names at the point via <code>M-.</code>. To generate tags (a TAGS file) for a project, you need [http://hackage.haskell.org/package/hasktags hasktags].
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$ cabal install hasktags
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=== Calling directly ===
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Run <code>M-x haskell-process-generate-tags</code> to generate the TAGS file of the [[Sessions|current session directory.]]
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You can now use <code>M-.</code> on a name in a Haskell buffer which will jump directly to its definition. You can also now use it for [[Emacs/Autocompletion|autocompletion]].
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=== On save ===
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Provided you have [[Emacs/Keybindings_and_simple_usage#Rebind_C-x_C-s|properly bound <code>C-x C-s</code>]], you just need to enable tags generation on save:
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(custom-set-variables
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'(haskell-tags-on-save t))
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or
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(setq haskell-tags-on-save t)
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or just <code>M-x customize-group haskell</code> and it's in there.
   
 
== Speedbar ==
 
== Speedbar ==

Latest revision as of 18:48, 28 May 2012

Contents

[edit] 1 Emacs tags/hasktags

[edit] 1.1 Get hasktags

ETAGS allows jumping to the definition of names at the point via M-.. To generate tags (a TAGS file) for a project, you need hasktags.

$ cabal install hasktags

[edit] 1.2 Calling directly

Run M-x haskell-process-generate-tags to generate the TAGS file of the current session directory.

You can now use M-. on a name in a Haskell buffer which will jump directly to its definition. You can also now use it for autocompletion.

[edit] 1.3 On save

Provided you have properly bound C-x C-s, you just need to enable tags generation on save:

(custom-set-variables
 '(haskell-tags-on-save t))

or

(setq haskell-tags-on-save t)

or just M-x customize-group haskell and it's in there.

[edit] 2 Speedbar

Emacs has a SpeedBar which works quite nice together with haskell-mode and also detects syntactic elements such as variables, imports, instances, classes.

Just add

   (require 'speedbar)
   (speedbar-add-supported-extension ".hs")

to your .emacs file and fire up speedbar with M-x speedbar.