On Wed, Jul 22, 2015 at 9:30 AM, Sensei wrote:

Dear all,

I am defining a "scalar" type for a project, and this scalar I'd like to be an interval. Among the operations, already provided by boost interval, I need pow(interval, interval).

That sounds more like a Range ? http://www.boost.org/doc/libs/1_58_0/libs/range/doc/html/index.html

Since there is no pow() function, but log() and exp() are defined, I mistakenly defined power as the obvious:

typedef boost::numeric::interval<double> scalar;

scalar p(1.0, 1.0), q(4, 100);

log << "^ " << boost::numeric::exp(p * boost::numeric::log(q)) << std::endl;

Unfortunately, it won't work, and it gives me this error:

/usr/local/include/boost/numeric/interval/transc.hpp:47:42: No member named 'log_down' in 'boost::numeric::interval_lib::rounded_math<double>'

/usr/local/include/boost/numeric/interval/transc.hpp:34:16: No member named 'exp_down' in 'boost::numeric::interval_lib::rounded_math<double>'

Is there any "correct" pow() function I can implement? Is something wrong with the definition of scalar?

Thank you!

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Dear all, I've tried to move beyond simple exp/log functions, but this problem

/usr/local/include/boost/numeric/interval/transc.hpp:47:42: No member named 'log_down' in 'boost::numeric::interval_lib::rounded_math<double>'

/usr/local/include/boost/numeric/interval/transc.hpp:34:16: No member named 'exp_down' in 'boost::numeric::interval_lib::rounded_math<double>'

arises with *all* of the functions contained in transc.hpp, and I don't know what I'm doing wrong here. Can anyone help me? Thanks!