Re: [Haskell-cafe] Patterns overlapped?

[jerzy . karczmarczuk]

Fernando Rodriguez writes: 

What on Earth is ghc talking about? O:-)  (overlapping paterns)
                                
emptyBT = EmptyTree 

depth emptyBT = 0
depth (NodeBT _ left right) = max (1 + depth left) (1 + depth right)

GHC is always right... 

Your first clause is GENERIC, the pattern is a variable, not a constant.
Replace emptyBT by EmptyTree. 

Jerzy Karczmarczuk 


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