On Apr 25, 2008, at 9:54 AM, Jennifer Miller wrote:
So, I have a circular dependency in my modules that I don't know how
to resolve in Haskell. I went looking for the equivalent of #include
which is how I would have solved this in C++. I'm sure there is a
simple answer to this and I'm hoping this group can point me in the
right direction.
GHC supports CPP, so you could take the same approach in Haskell.
# cat Main.hs
data Foo = Foo { x :: Int, y :: Int } deriving Show
foo = Foo { x = 2,
#include "y.hs"
}
# cat y.hs
y = (x foo) + 2
# ghci -cpp Main.hs
GHCi, version 6.8.2: http://www.haskell.org/ghc/ :? for help
Loading package base ... linking ... done.
[1 of 1] Compiling Main ( Main.hs, interpreted )
Ok, modules loaded: Main.
*Main> foo
Foo {x = 2, y = 4}
*Main>
Aaron
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