Re: [boost] What about "Maybe" ?

Subject: Re: [boost] What about "Maybe" ?
From: Arnaud Masserann (arnaud1602_at_[hidden])
Date: 2009-12-21 06:44:47

As a matter of fact, none :)
The weird thing here is that google "boost maybe" or even "boost maybe
haskell" don't return anything, but here's an excerpt from Boost.Optional
ref :
" There is precedent for a discriminated union as a model for an optional
value: the Haskell <http://www.haskell.org/> *Maybe* built-in type
constructor. Thus, a discriminated union T+nil_t serves as a conceptual
foundation. "

Anyway, glad to hear it exists :)

Arnaud

On Mon, Dec 21, 2009 at 3:21 AM, OvermindDL1 <overminddl1_at_[hidden]> wrote:

> On Sun, Dec 20, 2009 at 7:11 PM, OvermindDL1 <overminddl1_at_[hidden]>
> wrote:
> > On Sun, Dec 20, 2009 at 6:48 PM, Arnaud Masserann <arnaud1602_at_[hidden]>
> wrote:
> >> Hi,
> >>
> >> Is there any interest for a "Maybe" utility class, like the one in
> Haskell ?
> >>
> >> For those who don't know about Maybe, here is the Haskell ref :
> >>
> http://www.haskell.org/ghc/docs/6.10.4/html/libraries/base/Prelude.html#t%3AMaybe
> >> And a code snippet showing its use :
> >> http://pastebin.com/m3a590d6e
> >
> > It looks like Boost.Optional from how it is used in your pastebin
> > snippet.  How is it different from Boost.Optional?
>
> For example, here is your snippet, copied and altered to use the
> Boost.Optional form:
>  http://pastebin.com/m24a84c01
>
> How is Maybe different?  Does it introduce any extra functionality?
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