Re: [GHC] #913: instance Ord (StableName a)

#913: instance Ord (StableName a)
-----------------------------+----------------------------------------------
 Reporter:  ekarttun         |          Owner:             
     Type:  feature request  |         Status:  new        
 Priority:  normal           |      Milestone:  6.8        
Component:  libraries/base   |        Version:  6.4.2      
 Severity:  normal           |     Resolution:             
 Keywords:                   |     Difficulty:  Easy (1 hr)
 Testcase:                   |   Architecture:  Unknown    
       Os:  Unknown          |  
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Changes (by simonmar):

  * milestone:  => 6.8
  * testcase:  =>

Comment:

 I think this is possible.  hashStableName says that it doesn't guarantee
 to be unique, but I think that's only because StableName identifiers can
 be reused.  There is a danger that one of the SNs might get GC'd just
 after we call stableNameToInt# on it and the identity could be reused by
 newStableName in another thread, but the original comparison would still
 be valid.  Conclusion: just call stableNameToInt# on the two stable names
 and compare the Int#s.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/913>
GHC <http://www.haskell.org/ghc/>
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