Function dereference

boost/optional/optional.hpp:471–471

reference_content lacks an implicit conversion to T&, so the following is needed to obtain a proper reference.

    // reference_content<T> lacks an implicit conversion to T&, so the following is needed to obtain a proper reference.
    reference_const_type dereference( internal_type const* p, is_not_reference_tag ) const { return *p ; }
    reference_type       dereference( internal_type*       p, is_not_reference_tag )       { return *p ; }
    reference_const_type dereference( internal_type const* p, is_reference_tag     ) const { return p->get() ; }
    reference_type       dereference( internal_type*       p, is_reference_tag     )       { return p->get() ; }