How to find unused exported symbols?

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John D. Ramsdell

15 Feb 2010 15 Feb '10

10:22 a.m.

I would like to find symbols exported from each module in a program that are not used outside the module. I'm worried my program is accumulating cruft. I'm looking for suggestions on how to find unused exported symbols. Do I have to analyse .hi files? Thanks in advance. John

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Yuras Shumovich

15 Feb 15 Feb

10:35 a.m.

Hmm... It looks like a useful tool to implement. (Of course it does not make sense for libraries, only for executables) It can be easily implemented using haskell-src-exts package. 2010/2/15 John D. Ramsdell :

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I would like to find symbols exported from each module in a program that are not used outside the module. I'm worried my program is accumulating cruft. I'm looking for suggestions on how to find unused exported symbols. Do I have to analyse .hi files? Thanks in advance.

John _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Ivan Miljenovic

10:42 p.m.

On 16 February 2010 02:22, John D. Ramsdell wrote:

...

I would like to find symbols exported from each module in a program that are not used outside the module. I'm worried my program is accumulating cruft. I'm looking for suggestions on how to find unused exported symbols. Do I have to analyse .hi files? Thanks in advance.

-Wall will tell you which entities in are module are top-level but not exported; my SourceGraph program (available from Hackage) will tell you which entities in the entire project are top-level but not exported. Note that at the moment the output is rather ugly.... -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com Mike Ditka - "If God had wanted man to play soccer, he wouldn't have given us arms." - http://www.brainyquote.com/quotes/authors/m/mike_ditka.html

John D. Ramsdell

11:19 p.m.

I wonder if I should use the GHC API to do this. I notice there is a module called BinIface that contains a reader for interface files. The trouble is you have to figure out how to initialize a program that uses the module, and that seems to be difficult. I couldn't find anything relevant on the Wiki. John On Mon, Feb 15, 2010 at 10:42 PM, Ivan Miljenovic wrote:

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On 16 February 2010 02:22, John D. Ramsdell wrote:

...
I would like to find symbols exported from each module in a program that are not used outside the module. I'm worried my program is accumulating cruft. I'm looking for suggestions on how to find unused exported symbols. Do I have to analyse .hi files? Thanks in advance.

-Wall will tell you which entities in are module are top-level but not exported; my SourceGraph program (available from Hackage) will tell you which entities in the entire project are top-level but not exported. Note that at the moment the output is rather ugly....

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com Mike Ditka - "If God had wanted man to play soccer, he wouldn't have given us arms." - http://www.brainyquote.com/quotes/authors/m/mike_ditka.html

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Ivan Miljenovic
John D. Ramsdell
Yuras Shumovich