On Thursday 04 December 2008 00:11:13 Ian Lynagh wrote:
> If you have downloaded the source tarball then the preprocessed files
> are included. Cabal may be getting confused by the .x files also being
> present, so
> rm src/Scan.x
> should fix it. You may also need to
> rm src/Parser.y
> if you don't have happy.
Dear Ian, all,
Thank you for your tip, Ian. Deleting src/Scan.x did do the trick. However, I
get a very strange type error when I try to compile alex 2.2. Maybe someone
knows what's going on here:
[16 of 16] Compiling Main ( src/Main.hs,
dist/build/alex/alex-tmp/Main.o )
src/Main.hs:316:25:
Ambiguous type variable `e' in the constraint:
`GHC.Exception.Exception e'
arising from a use of `throw' at src/Main.hs:316:25-31
Probable fix: add a type signature that fixes these type variable(s)
Lines 314 through 316 in src/Main.hs are:
r <- Exception.catch
(unblock (thing a))
(\e -> do { after a; throw e })
I guess the error in itself makes some sense, because throw can not be
resolved without knowing a concrete instance of e. I just don't get why I get
this error in a release version of alex; I would imagine other people do not
get this error. What am I missing?
Regards,
Philip
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