Function eigen_encapsulate

include/pybind11/eigen/matrix.h:285–288

// whether or not the Type of the pointer given is const.
template <typename props, typename Type, typename = enable_if_t<is_eigen_dense_plain<Type>::value>>
handle eigen_encapsulate(Type *src) {
    capsule base(src, [](void *o) { delete static_cast<Type *>(o); });
    return eigen_ref_array<props>(*src, base);
}

// Type caster for regular, dense matrix types (e.g. MatrixXd), but not maps/refs/etc. of dense
// types.