cvs commit: fptools/libraries/base/GHC Arr.lhs

[Simon Peyton-Jones]

I couldn't figure out why -- and you get much better performance this
way.  Anyone who sees a probem with defining unsafeRange size in terms
of unsafeIndex, please yell.  The 'deriving(Ix)' stuff now does the
same.

Simon

| -----Original Message-----
| From: Ross Paterson [mailto:ross at soi.city.ac.uk]
| Sent: 12 April 2005 13:27
| To: Simon Peyton Jones
| Cc: cvs-libraries at haskell.org
| Subject: Re: cvs commit: fptools/libraries/base/GHC Arr.lhs
| 
| On Mon, Apr 04, 2005 at 05:16:45AM -0700, Simon Peyton Jones wrote:
| > simonpj     2005/04/04 05:16:45 PDT
| >
| >   Modified files:
| >     libraries/base/GHC   Arr.lhs
| >   Log:
| >   Default method for unsafeRangeSize should use unsafeIndex!
| 
| Hmm.  When unsafeRangeSize was made a method (ghc/lib/std/PrelArr.lhs
| rev. 1.29), this seems to have been deliberately avoided, with the
| definition using unsafeIndex in all the instances.  I wonder why.