Re: [boost] Ranged type mini-library submission

From: Victor A. Wagner Jr. (vawjr_at_[hidden])
Date: 2004-05-19 22:43:05

At Saturday 2004-05-15 16:35, you wrote:
>----- Original Message -----
>From: "Victor A. Wagner Jr." <vawjr_at_[hidden]>
>To: <boost_at_[hidden]>
>Sent: Saturday, May 15, 2004 9:10 AM
>Subject: Re: [boost] Ranged type mini-library submission
>
>
> > what is >> expected to do if the number input it "out of range"?
> > can we, for example, write  cin >> month; (see below for definition of
>month)?
>
>I am of the loose opinion that we shouldn't worry around with input/output
>operators for the range type. I am flexible on this though.

Obviously,I wouldn't have asked if I didn't think it were important.  IMO 
the C founders were so dead set against strong typing that they ignored 
(and taught almost an entire generation of programmers) to ignore the 
concept.  So now we have a language in which I cannot reasonably ensure 
mathematical limits on the range of numbers I need to play with.

I guess what I'm asking is:

if you cannot input or output it, what good is it?

> > should this be using numeric_limits<T>::epsilon() (instead of DBL_EPSILON)
> > and would that even work for numbers larger than 2.0?
>
>Good point, I am working on fixing that.
>
>Christopher Diggins
>http://www.cdiggins.com
>http://www.heron-language.com
>
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Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"