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 ca
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
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 1/31/07, Bulat Ziganshin <[EMAIL PROTECTED]> wrote:
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_
(http://research.microsoft.com/~simonpj/
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 i
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 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 eith
