[Haskell-cafe] Are there standard idioms for lazy, pure error handling?

[Jason McCarty]

wren ng thornton wrote:

>     concat1 :: T a b -> (b -> T a b) -> T a b

This could just as easily be

  concat :: T a b -> (b -> T a c) -> T a c

right? It's a little weird to call this concatenation, but I bet it
could come in handy.

-- 
Jason McCarty <jmccarty at sent.com>