Struct DynamicToken

pub struct DynamicToken(/* private fields */);

Dynamic token, equivalent to an usize in memory.

Each token instantiated with DynamicToken::new is unique, but the number of instantiated token in all the program lifetime must not overflow isize::MAX.

This constraint comes from the trivial unicity implementation, an AtomicUsize, with no possible reuse of dropped tokens. You should use smart-pointer based token instead, as they use non-trivial unicity algorithm named “memory allocator”.

Implementations

impl DynamicToken

pub fn new() -> Self

Create a unique token.

Panics

Panics when usize::MAX tokens has already been created.

Trait Implementations

impl Debug for DynamicToken

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DynamicToken

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for DynamicToken

fn eq(&self, other: &DynamicToken) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Token for DynamicToken

type Id = usize

Id of the token.

fn id(&self) -> Self::Id

Returns the token id.

fn is_unique(&mut self) -> bool

Returns true if the token is “unique”, see safety

impl Eq for DynamicToken

impl StructuralPartialEq for DynamicToken