[GHC] #673: Import FastPackedStrings for 6.6

[GHC]

#673: Import FastPackedStrings for 6.6
-------------------------------+--------------------------------------------
  Reporter:  simonmar          |          Owner:         
      Type:  task              |         Status:  new    
  Priority:  high              |      Milestone:  6.6    
 Component:  libraries/base    |        Version:  6.4.1  
  Severity:  normal            |     Resolution:         
  Keywords:                    |             Os:  Unknown
Difficulty:  Moderate (1 day)  |   Architecture:  Unknown
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Changes (by simonmar):

  * priority:  normal => high

Old description:

> 6.6 must have a better PackedString library, probably based on ForeignPtr
> (probably a combination of [http://www.cse.unsw.edu.au/~dons/fps.html
> FastPackedStrings] and simonmar's version).  I'm not sure how we go about
> deprecating the current interface and adding the new one yet.

New description:

 6.6 must have a better !PackedString library, probably based on
 !ForeignPtr (probably a combination of
 [http://www.cse.unsw.edu.au/~dons/fps.html FastPackedStrings] and
 simonmar's version).  I'm not sure how we go about deprecating the current
 interface and adding the new one yet.

Comment:

 We still need to deprecate the old {{{Data.PackedString}}} API.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/673>
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