Struct script::dom::htmlcollection::OptionU32

struct OptionU32 {
    bits: u32,
}

An optional u32, using u32::MAX to represent None. It would be nicer just to use Option<u32> for this, but that would produce word alignment issues since Option<u32> uses 33 bits.

Fields

bits: u32

Implementations

impl OptionU32

fn to_option(self) -> Option<u32>

fn some(bits: u32) -> OptionU32

fn none() -> OptionU32

Trait Implementations

impl Clone for OptionU32

fn clone(&self) -> OptionU32

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl MallocSizeOf for OptionU32

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl Traceable for OptionU32

unsafe fn trace(&self, tracer: *mut JSTracer)

Trace self.

impl Copy for OptionU32