On 6/5/10 6:01 AM, alfC wrote:
On Jun 3, 7:52 pm, Joel de Guzman<j...@boost-consulting.com> wrote:
On 6/4/10 10:31 AM, alfC wrote: There is hope. Just specialize boost::phoenix::result_of_xxx (e.g. boost::phoenix::result_of_plus<X, Y>). I specilized result_of_multiplies and still no luck:
#include<boost/spirit/home/phoenix.hpp> #include<iostream> #include<typeinfo> #include<boost/units/systems/si.hpp>
namespace boost{ namespace phoenix{ using namespace boost::units; template<> //in general template<class XUnit, class YUnit> struct result_of_multiplies<quantity<si::length>, quantity<si::length>
{ typedef quantity<si::area> type; }; }}
The type-deduction respects references. Phoenix2 passes in references. The code should be: template<> //in general template<class XUnit, class YUnit> struct result_of_multiplies<quantity<si::length>&, quantity<si::length>&> { typedef quantity<si::area> type; }; Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net