[Haskell-cafe] Re: Patterns overlapped?
Brandon S. Allbery KF8NH
allbery at ece.cmu.edu
Sun Jan 13 14:06:55 EST 2008
On Jan 13, 2008, at 14:05 , Fernando Rodriguez wrote:
>> depth emptyBT = 0
>> depth (NodeBT _ left right) = max (1 + depth left) (1 + depth right)
> Sorry, the exact error is:
> Warning: Pattern match(es) are overlapped
> In the definition of `depth': depth (NodeBT _ left right) = ...
Right. emptyBT matches anything and stores it in a new local
variable "emptyBT", so the second pattern overlaps this.
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
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