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From: Martin Bonner (martin.bonner_at_[hidden])
Date: 2006-07-25 07:01:56

----Original Message----
From: Johan Råde

> template<class T> bool is_nan(T a)
> {
> return a != a;
> }
> 1. Do these implementations work an all platforms?

I believe is_nan is vunerable to over-eager optimizers for built-in types.

> 2. The category not-a-number can be divided into the sub-categories
> quite not-a-number and signalling not-a-number.
Should be "quiet". This error has continued throughout the email chain, so it is obviously not just a simple typo (or it is getting copy-and-pasted).

Martin Bonner
Pi Technology, Milton Hall, Ely Road, Milton, Cambridge, CB4 6WZ,
ENGLAND Tel: +44 (0)1223 203894

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