[Haskell] Per-type function namespaces (was: Data.Set whishes)

[Per Larsson]

In my humble opionon explicit module prefixes are a feature, which enhance 
code clarity, and not something you want get rid of using rather complex  
namespace extensions. However, as Alastair Reid's mail in this thread 
indicates there are weaknesses in haskell's export mechanism. But these would 
be far more easy to fix than introducing the suggested per type namespace 
extension. The present export list is also rather ugly from an aesthetic 
point of view, clottering the module header. I would love to see an, 
repeatable, explicit 'export' directive with similar keywords as the import 
directive. Allowing for example:
'export [all] hiding (...)' with obvious semantics.

Per Larsson