Re: [boost] Ann: Floating Point Utilities Review starts today

From: Steve Ward (planet36_at_[hidden])
Date: 2008-03-01 13:56:10

On Wed, Feb 27, 2008 at 10:56 AM, Johan Råde <rade_at_[hidden]> wrote:

> John Maddock wrote:
>
> > There is one other useful function worth having IMO:
> >
> > template <class T>
> > int sign(T x);
> >
> > returns 0 (x is zero), +1 (x is > 0) or -1 (x is < 0).  This is trivial
> to
> > implement (lot's of old C code - for example the Numerical Recipies
> stuff -
> > implement this as a helper macro), and there's an undocumented version
> > currently in Boost.Math.  Is this worth integrating with Johan's code?
>  I've
> > found it quite useful in Boost.Math from time to time.
>
> The library deals with signbits, not with signs.
> So I think that adding this function to the library would just create
> confusion.
> It may be a useful function, but I don't think it belongs here.
>
> --Johan
>
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I agree.

Steve