Trait Key 

pub trait Key:
    Clone
    + Debug
    + Default
    + PartialEq
    + Eq
    + 'static {
    // Required methods
    fn make_id(&self, parent: &Id) -> Id;
    fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>;
}

Bounds on the key type

This type should be small, easy to copy, and without internal mutability.

Required Methods

fn make_id(&self, parent: &Id) -> Id

Make an Id for a key

The result must be distinct from parent and a descendant of parent (use Id::make_child for this, optionally more than once).

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

Reconstruct a key from an Id

Where child is the output of Self::make_id for the same parent or any Id descended from that, this should return a copy of the key passed to make_id.

See: Id::next_key_after, Id::iter_keys_after

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Key for (u32, u32)

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for (u64, u64)

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for (usize, usize)

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for u32

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for u64

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for ()

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

impl Key for usize

fn make_id(&self, parent: &Id) -> Id

fn reconstruct_key(parent: &Id, child: &Id) -> Option<Self>

Implementors

impl Key for GridIndex