[Haskell-cafe] Re: [Haskell] Top Level <-

[Ganesh Sittampalam]

On Wed, 27 Aug 2008, Jonathan Cast wrote:

> * I wonder why that name was chosen?  The design doesn't seem to have
> anything to do with IO, it's more of a `we have this in C so we want it
> in Haskell too' monad.

The 'C' in ACIO says that it commutes with any operation in the IO
monad. Without that property you can't safely implement it in a
program where the top-level has type IO a.

http://www.haskell.org/pipermail/haskell-cafe/2004-November/007664.html

Ganesh