Re: [Haskell-cafe] Testing and module export lists

On 25 February 2010 10:21, Evan Laforge wrote:

On Wed, Feb 24, 2010 at 3:10 PM, Ivan Miljenovic wrote:

...

If you start a function name with an underscore, it is "implicitly exported" by GHC (I can't find the actual documentation page at the moment however).  Whilst it may not appear in the export list, you are still able to call it from outside the module.

Wow, I'd never heard of that feature.

Neither had I, until Curt Sampson asked me to support it in SourceGraph. Anyway, I've tracked down the documentation page: http://www.haskell.org/ghc/docs/latest/html/users_guide/options-sanity.html . It's not listed explicitly anywhere; different items have different documentation regarding it throughout the page. -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com Samuel Goldwyn - "I don't think anyone should write their autobiography until after they're dead." - http://www.brainyquote.com/quotes/authors/s/samuel_goldwyn.html