I noticed today that I can pattern match against lazy bytestrings when using the OverloadedStrings extension:
import Data.ByteString.Char8 () > > import Data.ByteString.Lazy.Char8 > > >> f :: ByteString -> Bool > > f "abc" = True > > f _ = False > > >> main = do > > print $ f $ fromChunks ["abc"] > > print $ f $ fromChunks ["a","bc"] > > When I run the above, I get: True > > True > > Given that pattern matching is based on data constructors, how is it possible that (Chunk "abc Empty) and (Chunk "a" (Chunk "bc" Empty)) match the same pattern? Tom
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