Struct traitgraph::index::OptionalEdgeIndex [−][src]
pub struct OptionalEdgeIndex<IndexType: Sized>(_);
Expand description
An edge index that can be None
.
This is a hack to get a small sized Option<EdgeIndex>
by storing the None
variant as IndexType::max_value()
.
If Rust ever adds support for integer types with invalid values other than 0, this type becomes obsolete.
Trait Implementations
Performs the conversion.
impl<IndexType: PrimInt + Hash> GraphIndex<OptionalEdgeIndex<IndexType>> for EdgeIndex<IndexType>
impl<IndexType: PrimInt + Hash> GraphIndex<OptionalEdgeIndex<IndexType>> for EdgeIndex<IndexType>
impl<IndexType: PrimInt + Hash> OptionalGraphIndex<EdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
impl<IndexType: PrimInt + Hash> OptionalGraphIndex<EdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
Get this index as usize
, but return None
if this index is marked as invalid.
A faster method to get the usize
value of the index, which does not perform any validity checks.
Returns true
if the index is valid, i.e. if it is not marked as invalid.
impl<IndexType: PartialEq + Sized> PartialEq<OptionalEdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
impl<IndexType: PartialEq + Sized> PartialEq<OptionalEdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
impl<IndexType: PartialOrd + Sized> PartialOrd<OptionalEdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
impl<IndexType: PartialOrd + Sized> PartialOrd<OptionalEdgeIndex<IndexType>> for OptionalEdgeIndex<IndexType>
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Auto Trait Implementations
impl<IndexType> RefUnwindSafe for OptionalEdgeIndex<IndexType> where
IndexType: RefUnwindSafe,
impl<IndexType> Send for OptionalEdgeIndex<IndexType> where
IndexType: Send,
impl<IndexType> Sync for OptionalEdgeIndex<IndexType> where
IndexType: Sync,
impl<IndexType> Unpin for OptionalEdgeIndex<IndexType> where
IndexType: Unpin,
impl<IndexType> UnwindSafe for OptionalEdgeIndex<IndexType> where
IndexType: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.