# QVM: Quaternions, Vectors, Matrices

### enable_if

#include <boost/qvm/enable_if.hpp>

    namespace boost
    {
        namespace qvm
        {
            using boost::enable_if;
            using boost::enable_if_c;
            using boost::lazy_enable_if;
            using boost::lazy_enable_if_c;
        }
    }

These enable_if templates are used by Boost OVM to implement SFINAE/enable_if. By default, they refer to the implementation provided in the Boost enable_if library.

See also: boost/qvm/enable_if.hpp | SFINAE/enable_if