On Mon, Aug 30, 2010 at 11:24:06PM -0700, strejon wrote:
> I'm aware of phantom types and the like, but I've been unable to
> work out how to use them (or another type system extension)
> to properly track "validity" on the type level. I'd want something
> like:
>
> validate :: Certificate Possibl
does anybody know of anything on Hackage for testing whether two
values are "approximately equal"?
http://hackage.haskell.org/package/approximate-equality
--
Underestimating the novelty of the future is a time-honored tradition.
(D.G.)
___
Has
2010/8/31 Andrew Coppin :
> Luke Palmer wrote:
>>
>> I have a description of the design pattern you need, appropriately
>> named:
>> http://lukepalmer.wordpress.com/2009/03/24/certificate-design-pattern/
>>
>
> Mmm, I like that.
>
> There are two small problems:
>
> * In my web browser, some of the
Luke Palmer wrote:
I have a description of the design pattern you need, appropriately
named: http://lukepalmer.wordpress.com/2009/03/24/certificate-design-pattern/
Mmm, I like that.
There are two small problems:
* In my web browser, some of the code snippets get the right-hand edge
choppe
I have a description of the design pattern you need, appropriately
named: http://lukepalmer.wordpress.com/2009/03/24/certificate-design-pattern/
On Tue, Aug 31, 2010 at 12:24 AM, strejon wrote:
>
> Hello. I'm using Haskell to write a specification for some software. The
> software uses certificat
Erik Hesselink wrote:
>
> If you want to use types instead of modules and hiding as Chris
> suggested, you can use a type index like this:
>
> {-# LANGUAGE EmptyDataDecls, GADTs, KindSignatures #-}
> data Nothing
> data Just a
>
> data Subject :: * -> * where
> NoName :: Subject Nothing
>
On Tue, Aug 31, 2010 at 08:24, strejon wrote:
>
> Hello. I'm using Haskell to write a specification for some software. The
> software uses certificates (standard X.509 certificates) and stores user
> name information in the Subject's CommonName field.
>
> The X.509 standard doesn't actually requir
On 31 aug 2010, at 08:24, strejon wrote:
>
> Hello. I'm using Haskell to write a specification for some software. The
> software uses certificates (standard X.509 certificates) and stores user
> name information in the Subject's CommonName field.
>
> The X.509 standard doesn't actually require t
Hello. I'm using Haskell to write a specification for some software. The
software uses certificates (standard X.509 certificates) and stores user
name information in the Subject's CommonName field.
The X.509 standard doesn't actually require the presence of a CommonName
field so the contents of t
