[boost] Re: [math constants] a new approach (perhaps)

From: Daniel Frey (daniel.frey_at_[hidden])
Date: 2004-03-01 05:18:25

Thorsten Ottosen wrote:
> Yes, of course. BTW, I've attached the file since
> my messages seems to format the code like ****.
> 
> br
> 
> Thorsten

With no offense intended, but that's a very simple version which doesn't 
work in many situations. The problems of your solution are:

- Doesn't work well for UDTs (try std::complex, some conversions are 
ambiguous then)
- Doesn't scale for new types (you need to know all of them in the 
single header that defines the constant)
- Doesn't work for more complex expressions (pi*pi*t instead of T(pi)*pi*t)
- Doesn't work for function calls (srqt(pi)*t instead of sqrt(T(pi))*t)
- Doesn't solve the naming dilemma (how to spell the constant "pi*pi"?)
- Doesn't work well with unit libraries AFAICS (again not scaling well)

I really suggest you look at my code at 
<http://groups.yahoo.com/group/boost/files/MathConstants/>, which solves 
all of the above points. Feel free to ask questions.

Regards, Daniel

-- 
Daniel Frey
aixigo AG - financial solutions & technology
Schloß-Rahe-Straße 15, 52072 Aachen, Germany
fon: [phone], fax: [phone]
eMail: daniel.frey_at_[hidden], web: http://www.aixigo.de