Repository : ssh://darcs.haskell.org//srv/darcs/ghc On branch : master
http://hackage.haskell.org/trac/ghc/changeset/e89f3bac94f513841f46346528183920783ce1f9 >--------------------------------------------------------------- commit e89f3bac94f513841f46346528183920783ce1f9 Author: Simon Peyton Jones <simo...@microsoft.com> Date: Wed Jan 2 08:26:28 2013 +0000 In type or data instances, check that all variables are bound Trac #7536 points out that it's possible for the LHS to *look* as if it binds variables, but does not acutally do so type T a = Int type instance F (T a) = a This patch makes it an error. compiler/typecheck/TcInstDcls.lhs | 43 ++++++++++++++++++----------------- compiler/typecheck/TcMType.lhs | 36 ++++++++++++++++++++++------- compiler/typecheck/TcTyClsDecls.lhs | 23 ++++++------------ 3 files changed, 57 insertions(+), 45 deletions(-) Diff suppressed because of size. To see it, use: git show e89f3bac94f513841f46346528183920783ce1f9 _______________________________________________ Cvs-ghc mailing list Cvs-ghc@haskell.org http://www.haskell.org/mailman/listinfo/cvs-ghc
