[Haskell-cafe] Coding conventions for Haskell?

[Henning Thielemann]

On Thu, 30 Sep 2010, Bas van Dijk wrote:

> On Thu, Sep 30, 2010 at 5:15 PM, Christopher Done
> <chrisdone at googlemail.com> wrote:
>> ... One thing that makes figuring out a code base hard is when the
>> code doesn't have explicit imports. Sometimes I can load the code in
>> GHCi and inspect the symbols manually, sometimes I can't. If the
>> import list explicitly said where stuff came from I wouldn't have to
>> deal with this.
>
> Indeed. I strictly use this style in all my projects. See the
> following for example:
>
> http://hackage.haskell.org/packages/archive/usb/0.6.0.1/doc/html/src/System-USB-Internal.html
>
> I see it as a service to my readers. In order to find out where a
> symbol is coming from they only need to scroll up and look it up in
> the import list. Note that for further convenience I group the imports
> by package so they don't need to figure out which package exports what
> module.

It is also necessary when you want x.y.* style version dependencies on 
packages that follow the package versioning policy.

http://www.haskell.org/haskellwiki/Import_modules_properly