Isaac Dupree schrieb:
On 01/05/11 00:07, Isaac Dupree wrote:
On 01/04/11 13:20, Ian Lynagh wrote:
GHC actually can't currently deprecate one export of 'catch' but not the other. Because of this, and because of the possible confusion etc with having 2 'catch' functions, I suggest we add catchIO and tryIO to System.IO.Error too. This will also give the new report a catch function it can refer to without having to worry about existential quantification etc.
Noooooooooooooooooo! Then "throwIO" will throw an exception and "catchIO" won't catch it. I will feel horribly confused; or at least some people probably will. Thoughts?
Perhaps "catchIOError" and "tryIOError"? (I suggest "*IOError" not "*IOException" for consistency with the other functions in System.IO.Error, but "catchIOException" is fine with me too.)
Dear Haskell programmers ... Mind you that Haskell has a nice module system that allows qualified import. :-) import qualified System.IO.Error as IOErr main = ... IOErr.catch ... is the best we can have. Why changing the name 'catch' to 'catchIOError' in order to support unqualified import?