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From: Paul A Bristow (pbristow_at_[hidden])
Date: 2008-05-02 05:43:06

>-----Original Message-----
>From: boost-bounces_at_[hidden]
>[mailto:boost-bounces_at_[hidden]] On Behalf Of David Abrahams
>Sent: 01 May 2008 19:47
>To: boost_at_[hidden]
>Subject: Re: [boost] [Math/nextafter] A question of naming functions...

>on Tue Apr 29 2008, Kevin Lynch <> wrote:
>>>> T next_greater(T val)
>>>> Returns the next representable value greater than "val".
>>>> T next_less(T val)
>>>> Returns the next representable value less than "val".

>We do have next() and prior() (not abbreviations!) already, which have
>meaning for iterators, integers, etc.

Doh! So why didn't I remember that!

next and prior sound entirely intuitive to me.

However John has specifically limited his question to floating-point types. (I'm not totally convinced this is wise).

I think many novice non-mathematician, but not entirely floating-point naïve, users will want these functions.

But none of suggestions so far for the difference or distance really grabs me.

Complicated mathy terms like edit_difference and distance will not be what the above users will be looking for, even if they are
what they need.


Paul A Bristow
Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB
+44 1539561830 & SMS, Mobile +44 7714 330204 & SMS

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