you declared 'T Op [Tree]' so you should give 'T AND [L 1, L 2]' as the tree, right? Hi, Felipe. You are right. This means that I gave the correct input to the program. As you can see, I typed 'T AND [L 1, L 2]'. Therefore, JHC was expected to parse and print it. However, it failed to parse it. The program works perfectly well in GHC. Here is the GHC output:
philip@desktop:~/jhctut$ ghc tree.hs --make [1 of 1] Compiling Main ( tree.hs, tree.o ) Linking tree ... philip@desktop:~/jhctut$ ./tree Give me a tree: T AND [L 1, L 2] T AND [L 1,L 2]
--- On Wed, 11/11/09, Felipe Lessa
data Op = AND | OR | NOT deriving (Show, Read) data Tree= L Int | T Op [Tree] deriving (Show, Read)
Hmm, you see,
philip@desktop:~/jhctut$ ./jtree Give me a tree: T AND (L 1, L 2)
jtree_code.c:2670: case fell off Aborted
you declared 'T Op [Tree]' so you should give 'T AND [L 1, L 2]' as the tree, right? -- Felipe. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe __________________________________________________________________ Make your browsing faster, safer, and easier with the new Internet Explorer® 8. Optimized for Yahoo! Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/