patch applied (ghc): Improve error reporting for 'deriving'

[Simon Peyton Jones]

Wed Dec 31 06:35:21 PST 2008  simonpj at microsoft.com
  * Improve error reporting for 'deriving'
  
  a) Improve the extra suggested fix when there's a "no instance"
     error in a deriving clause.
  
  b) Improve error location recording in tcInstDecl2
  
  Many of the changes in tcInstDecl2 are simple reformatting.
  
  

    M ./compiler/typecheck/TcDeriv.lhs -3 +1
    M ./compiler/typecheck/TcInstDcls.lhs -77 +78
    M ./compiler/typecheck/TcSimplify.lhs -11 +15

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20081231143521-1287e-47bad85112d149ac73ccb5484506af70c2c11e30.gz