Hello J.,
Thursday, February 1, 2007, 1:36:33 AM, you wrote:
Yes - you've reiterated Wadler's original design, with an automatic
problems with equational reasoning raised by this approach.
ok, i can live without it. i mean reasoning :)
i guess that anything more complex than Turing machine
On Wed, Jan 31, 2007 at 09:28:30PM +0300, Bulat Ziganshin wrote:
Wednesday, January 31, 2007, 7:12:05 PM, you wrote:
data Coord = Coord Float Float
view of Coord = Polar Float Float where
Polar r d= Coord (r*d) (r+d)-- construction
Coord x y | x/=0 || y/=0
On Thu, Feb 01, 2007 at 09:12:02AM -0800, David Roundy wrote:
On Wed, Jan 31, 2007 at 09:28:30PM +0300, Bulat Ziganshin wrote:
Next, i don't think that ability to use any functions in view buy
something important. pattern guards can be used for arbitrary
functions, or such function can be
Hello Simon,
Monday, January 22, 2007, 5:57:27 PM, you wrote:
adding view patterns to Haskell.
many of us was attracted to Haskell because it has clear and simple
syntax. but many Hugs/GHC extensions done by independent developers
differ in the syntax they used, because these developers either
On Wed, Jan 31, 2007 at 05:53:08PM +0300, Bulat Ziganshin wrote:
something like this:
data Coord = Coord Float Float
view of Coord = Polar Float Float where
Polar r d= Coord (r*d) (r+d)-- construction
Coord x y | x/=0 || y/=0 = Polar (x*y) (x+y)--
Hello David,
Wednesday, January 31, 2007, 7:12:05 PM, you wrote:
data Coord = Coord Float Float
view of Coord = Polar Float Float where
Polar r d= Coord (r*d) (r+d)-- construction
Coord x y | x/=0 || y/=0 = Polar (x*y) (x+y)-- matching
This is
On 1/31/07, Bulat Ziganshin [EMAIL PROTECTED] wrote:
snip
i hope that now my idea is clear
Yes - you've reiterated Wadler's original design, with an automatic
creation of a type class. Erwig and Peyton-Jones, _Pattern Guards and
Transformational Patterns_
