Re: [Haskell-cafe] Why isn't pattern matching lazy by default?

[Peter Verswyvelen]

C.M.Brown wrote:
f ~(x:xs) = x + 2
f ~[] = 42
Then f [] would give a complie error:
 Irrefutable pattern failed for pattern (x : xs)
    

Sorry, that should be *runtime* error!

Chris.
  
It seems GHC does give a warning at compile-time about it, so you did 
get it right the first time :-)

Thanks for the info,
Peter


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