Remove 'rename' and friends from TH.Lib

[simonpj]

There are a handful of functions in the template-haskell package, module Language.Haskell.TH.Lib, that are defined in that module, but are not used, and are not exported by the main Template Haskell interface Language.Haskell.TH.

I propose to nuke them. I assume no one is using them (since they are not exported by the main interface), and I'm not keen on the API of rename. Moreover, rename becomes signficantly more compilcated with the advent of view patterns.

The functions are:

combine :: [([(Name, Name)], Pat)] -> ([(Name, Name)], [Pat])
  -- Seems to be a helper for rename
rename :: Pat -> Q ([(Name, Name)], Pat)
genpat :: Pat -> Q ((Name -> ExpQ), Pat)
alpha :: [(Name, Name)] -> Name -> ExpQ

simpleMatch :: Pat -> Exp -> Match
  -- This is the most defensible; it's a "smart constructor"

Deadline 2 weeks.

[igloo]

All but alpha have been removed:

Fri Nov 12 17:08:08 GMT 2010  simonpj@microsoft.com
  * Remove unused functions combine, rename, genpat, simpleMatch
  Ignore-this: 997a0c5a9a7dcefaf763c06c1f7ae799
  
  See Trac #4423

What's the situation with alpha, Simon?

[simonpj]

Bother. It too was only used from genpat. Ian, could you remove it too, please? Sorry.

[igloo]

Done:

Sun Nov 21 06:26:46 PST 2010  Ian Lynagh <igloo@earth.li>
  * Remove the "alpha" helper function; trac #4423