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Subject: Re: [boost] Review request: extended complex number library
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2012-03-06 04:17:15

On 03/05/2012 10:41 PM, Matthieu Schaller wrote:
> Dear all,
> Following the comments from V. Escriba, I formally propose my complex
> number library for review.
> The library is an extension of the std::complex class addressing two
> issues:
> - The standard does not guaranty the behaviour of the complex class if
> instantiated with types other than float/double/long double.
> - Some calculation where pure imaginary numbers (i.e. multiples of
> sqrt(-1)) appear are unnecessarily slowed down due to the lack of
> support for these numbers.
> The code I submit contains two interleaved classes boost::complex and
> boost::imaginary which can be instantiated with any type T provided T
> overloads the usual arithmetic operators and some basic (real)
> mathematical functions depending on which complex function will be used.

How about having a boost::real<T> (or whatever you want to name it),
that references a complex number with an imaginary part set to 0?

The difference would be that sqrt(boost::real<double>(-1)) would return
a boost::complex<T> rather than a NaN.

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