Struct Id 

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

An opaque identifier that is associated with AST items.

The default implementation for an identifier is empty, meaning it does not hold any value, and attempting to perform lookups over it will fail with an error indicating that it’s empty with the string Id(*).

Implementations

impl Id

pub fn initial() -> Self

Construct the initial (non-empty) id.

pub fn new(index: usize) -> Option<Id>

Construct a new opaque identifier.

pub fn next(self) -> Option<Id>

Get the next id.

Trait Implementations

impl Clone for Id

fn clone(&self) -> Id

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Id

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

Formats the value using the given formatter.

impl Default for Id

fn default() -> Self

Returns the “default value” for a type.

impl Hash for Id

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Id

fn eq(&self, other: &Id) -> 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 Copy for Id

impl Eq for Id

impl StructuralPartialEq for Id