Re: phoenix domain language (to write mathematical formulas)

On 6/15/10 4:37 AM, Andrey Asadchev wrote:
> hello
>
> I have written to this list a few weeks ago regarding formula library
> built on top of phoenix,
> I changed few things around, here is the source code
>
> http://code.google.com/p/asadchev/source/browse/trunk/work/cxx/interval.hpp
>
> there is still more things to clean up.
>
> So far, the following things up possible (and some variations):
> there a few examples in the link in the bottom of file also
>
> compose loops like:
> x = (range(i) < N, 4 <= range(j) < M)[ expression ];
>
> x(); //evaluate expression
> reduce(_1 += _2)[ x ](x); // reduce expressions, usual reductions like
> sum can be predefined.
>
> // use ublas (matrix multiply example)
> ublas::matrix<double> a(N,N), b(N,N), c(N,N);
> function<matrix<double> > A(a), B(b), C(c);
>
> (range(i) < N)(range(j) < N)
>      [ A(i,j) = sum(range(k) < N)[ B(k,i)*C(k,j) ] ]();
>
>
> let me know if you have feedback.
> I would like to contribute this to project if you think it is worthwhile.
> I know quality is not very good yet, but I still work on it.

Nice. We're working on Phoenix3. It would be nice to see how this
all fits there.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net




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