Hi!
now, this is interesting:
\begin{code}
data Foo label = Const
main = print 1
\end{code}
"ghc-4.04 -c test.hs" works, but "ghc-4.04 -fglasgow-exts -c test.hs" yields:
Foo label
test.hs:2: Illegal data/newtype declaration
Compilation had errors
Instead of 'label', using 'unsafe',
now, this is interesting:
\begin{code}
data Foo label = Const
main = print 1
\end{code}
"ghc-4.04 -c test.hs" works, but "ghc-4.04 -fglasgow-exts -c
test.hs" yields:
Foo label
test.hs:2: Illegal data/newtype declaration
When you compile with -fglasgow-exts, several more
