This is actually no longer an issue, as H98's behaviour for derived Show and Read instances have changed recently.
When Simon next has the time (and inclination) to put out a Report revision, text describing the change will be included. In the meantime, have a look at static.c:mkReadInfix() and static.c:showsPrecRhs() in the current Hugs98 sources for details of the tweaks made. --sigbjorn ----- Original Message ----- From: "Alastair Reid" <[EMAIL PROTECTED]> To: "Matt Fairtlough" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, May 31, 2002 09:38 Subject: Re: monomorphism/hugs98/ghc-5.02.3 > > > It encourages me to submit my next problem: stack overflow with > > simple Show instances...more later > > Let me guess that this involves a data declaration of the form: > > data Foo = ... | Foo <op> ... | ... > > That is an infix data constructor whose first argument is a recursive > reference to the datatype. > > This will throw the parser into an infinite loop - the usual problem > of recursive descent parsers and left recursive grammars. > > (If anyone is keeping a list of things to fix in Haskell 2, this > should be on the list. Seems that this oversight is almost as > embarrassing as Bell Labs (home of Aho, Sethi and Ullmann) designing a > language (C) which is not context free (because of the typedef > problem).) > > -- > Alastair Reid > _______________________________________________ > Glasgow-haskell-users mailing list > [EMAIL PROTECTED] > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
