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From: Jens Maurer (Jens.Maurer_at_[hidden])
Date: 2001-10-31 15:04:41

johnds_at_[hidden] wrote:
> Would there be any interest in a fast fourier transformation class?
> I've written one that has the following signature:
> template<class DOUBLE,
> class COMPLEX = std::complex<DOUBLE>,
> class VECTOR = std::vector<COMPLEX> >
> class fft
> {
> static inline void transform(VECTOR&, bool);
> };

> The reason for the class (as distinct from a templated function) is
> to enable default template arguments -
> there's no actual state.

Why do you need default template arguments at all?
Can't you deduce the type of VECTOR when you call transform()?
And then, COMPLEX = typename VECTOR::value_type
And then, DOUBLE = typename COMPLEX::value_type

Would it be possible to recast the interface in terms of
(random access) iterators? That would make transform() a lot more
flexible, because it could operate on sub-ranges (of e.g. a vector)
as well.

Jens Maurer

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