On 12/08/2017 00:53, Dani Brake via Boost-users wrote:
Hi, I'd like to forbid multiplication of Boost.Multiprecision floating point numbers by doubles. Any tips? I think I want to delete a family of operator*s, but am having a hard time coming up with which ones.
All the operators are enable_if'ed on "is_compatible_arithmetic_type<V, M>::value" where V is the arithmetic type and M is the multiprecision type. The trait is defined in boost/multiprecision/detail/number_base.hpp as: template <class T, class Num> struct is_compatible_arithmetic_type : public mpl::bool_< is_convertible<T, Num>::value && !is_same<T, Num>::value && !is_number_expression<T>::value> {}; So in principle you just define a full or partial specialization, for example: template <class Backend> struct is_compatible_arithmetic_type<double, number<Backend> > : public mpl::false_ {}; and then cross your fingers and hope for the best ;) This is untried, and it's quite likely there will be collateral damage - things which should compile but don't any more because they multiply by 0.5 or something. HTH, John. --- This email has been checked for viruses by AVG. http://www.avg.com