705 pub struct VirtRegion {  struct
711 impl VirtRegion {  impl
714         VirtRegion { start, size }  in new()
737         return Some(VirtRegion::new(start, size));  in between()
743     pub fn intersect(&self, other: &VirtRegion) -> Option<VirtRegion> {  in intersect()  argument
746         return VirtRegion::between(start, end);  in intersect()
775         return VirtRegion::new(self.start, round_up_to_page_size(self.size));  in round_up_size_to_page()
780     pub fn collide(&self, other: &VirtRegion) -> bool {  in collide()
794     pub fn before(self, region: &VirtRegion) -> Option<Self> {  in before()
801     pub fn after(self, region: &VirtRegion) -> Option<Self> {  in after()
811     pub fn rebase(self, vaddr: VirtAddr, new_base: &VirtRegion) -> Option<VirtAddr> {  in rebase()
834 impl PartialOrd for VirtRegion {  implementation
840 impl Ord for VirtRegion {  implementation