Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 47 insertions, 0 deletions

diff --git a/compiler/ilxGen/tests/test4.hs b/compiler/ilxGen/tests/test4.hs
new file mode 100644
index 0000000000..080c6521e3
--- /dev/null
+++ b/compiler/ilxGen/tests/test4.hs
@@ -0,0 +1,47 @@
+class  Eqq a  where
+    evenN :: a -> Bool
+    oddN	:: a -> Bool
+    evenN x		=  False
+    oddN x		=  True
+
+
+data N = Z | S N
+
+instance Eqq N 
+  where
+   evenN Z = True
+   evenN (S x) = oddN x
+   oddN Z = False
+   oddN (S x) = evenN x
+
+choose x = if evenN x then "hello world (evenN)\n" else if oddN x then "hello world (oddN)\n" else "no!\n"
+
+add n m = 
+   case n of
+       Z -> m  
+       S nn -> S (add nn m)
+
+mul n m = 
+   case n of
+       Z -> Z
+       S nn -> add m (mul nn m)
+
+pow n m = 
+   case m of
+       Z -> S Z
+       S mm -> mul n (pow n mm)
+
+n1 = S Z
+n2 = add n1 n1
+n4 = add n2 n2
+n6 = add n2 n4
+n8 = add n2 n6
+n10 = add n2 n8
+n16 = add n6 n10
+n18 = add n8 n10
+n20 = add n4 n16
+
+bign = pow n2 n16
+bign1 = add bign n1
+
+main = putStr (choose bign1)