Re: [Haskell-cafe] IO is not a monad (and seq, and in general _|_)

On Jan 23, 2007, at 15:34 , Neil Mitchell wrote:

prove/compute anything you couldn't before. While removing _|_ from the language does make some things nicer to reason about, there aren't many corners where _|_ really gets in the way that much - seq being one of those few corners.

But that is exactly the problem: `seq` forces _|_ to get into the way, when it normally doesn't. So I'm not clear that trying to fit `seq` into a formalization of Haskell's semantics is the way to go. -- brandon s. allbery [linux,solaris,freebsd,perl] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH