On 09/02/10 21:43, S. Doaitse Swierstra wrote:
One we start discussing syntax again it might be a good occasion to
reformulate/make more precise a few points.
The following program is accepted by the Utrecht Haskell Compiler (here
we took great effort to follow the report closely ;-} instead of
spending our time on n+k patterns), but not by the GHC and Hugs.
module Main where
-- this is a (rather elaborate) definition of the number 1
one = let x=1 in x
-- this is a definition of the successor function using section notation
increment = ( one + )
-- but if we now unfold the definition of one we get a parser error in GHC
increment' = ( let x=1 in x + )
Now that *is* an interesting example. I had no idea we had a bug in
that area. Seems to me that it ought to be possible to fix it by
refactoring the grammar, but I haven't tried yet.
Are there any more of these that you know about?
Cheers,
Simon
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