[Haskell-cafe] Are there arithmetic composition of functions?

[Richard O'Keefe]

On 21/03/2012, at 9:06 AM, Albert Y. C. Lai wrote:

> On 12-03-19 10:05 PM, Richard O'Keefe wrote:
>> http://www.haskell.org/onlinereport/haskell2010/haskellch9.html#x16-1710009
> 
> Haskell 2010 is already beginning to be out of date.

Was there any point in me pointing out that the latest release of a
well known Haskell compiler downloaded and installed YESTERDAY still
conformed to Haskell 2010, not this change?

Was there any point in me pointing out that the latest release of the
Haskell Platform downloaded YESTERDAY still conformed to Haskell 2010,
not this change?

Or was I shouting into the wind?

The change is a Good Thing.  No disagreement there.
The latest GHC supports it, and that's a Good Thing.
No disagreement there.
Some time there will be a new version of the Haskell Platform
incorporating new versions of the library and compiler,
and that will be a Good Thing too.

The point I was making remains valid:  right NOW, using current releases
of things other than GHC, the odds are that you will have to manually
upgrade your system, and
(a) you might not know how to do that (as I don't know how to upgrade
    UHC), and
(b) until the change is more widely adopted, your shiny new code will
    work for some people but not others.