Struct NodeConnections 

pub struct NodeConnections {
    inner: SmallVec<[Option<Connection>; 3]>,
    alloc_map: AllocMap<MAX_CONNECTIONS>,
    count: usize,
    active: Option<(usize, usize)>,
}

Keeps track of node connections. Stores them in a vector, with alloc_map keeping track of which spaces in the vector are allocated and which are not. Empty spaces are marked with Option::None in the inner vector.

Fields

inner: SmallVec<[Option<Connection>; 3]>

alloc_map: AllocMap<MAX_CONNECTIONS>

count: usize

active: Option<(usize, usize)>

Indices of connections which make up an active connection. Stored in order, meaning a[0] < a[1] (a[0] != a[1], an active connection cannot be between itself).

Implementations

impl NodeConnections

fn find_first_two(&self) -> Option<[usize; 2]>

pub fn add(&mut self, c: Connection) -> Result<usize, Connection>

Tries to add the connection. If the allocation succeded, returns the connections ID. If there is no space left, returns the connection wrapped in an error.

pub fn remove(&mut self, index: usize) -> bool

Attempts to remove the given connection. If no such connection exists, returns false, otherwise returns true.

pub fn remove_for(&mut self, segment: Entity) -> bool

Attempts to remove a connection with the given segment If no such connection exists, returns false, otherwise returns true.

pub fn has_free(&self) -> bool

Whether the backing store has any more free spaces.

pub fn iter(&self) -> impl Iterator<Item = &Connection>

Returns an iterator over the inner connections

pub fn len(&self) -> usize

Returns the number of connections

pub fn is_empty(&self) -> bool

Returns whether there are no connections, similar to Vec::is_empty()

pub fn activate(&mut self, c0: usize, c1: usize)

Sets connections with indices c0 and c1 as active.

pub fn deactivate(&mut self)

Removes the active connection.

pub fn active(&self) -> Option<(&Connection, &Connection)>

Returns the active connection.

fn advance(c0: &mut usize, c1: &mut usize, len: usize)

pub fn activate_next(&mut self)

Does nothing if there aren’t enough connections present (n < 2).

pub fn get_active_for(&self, segment: Entity) -> Option<&Connection>

Returns the other side of the active connection for the segment. None if segment isn’t part of the active connection.

Trait Implementations

impl Clone for NodeConnections

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for NodeConnections

fn default() -> Self

Returns the “default value” for a type.