Struct egg::Subst

pub struct Subst { /* fields omitted */ }

A substitition mapping Vars to eclass Ids.

Implementations

impl Subst

pub fn with_capacity(capacity: usize) -> Self

Create a Subst with the given initial capacity

pub fn insert(&mut self, var: Var, id: Id) -> Option<Id>

Insert something, returning the old Id if present.

pub fn get(&self, var: &Var) -> Option<&Id>

Retrieve a Var, returning None if not present.

Trait Implementations

impl Clone for Subst

fn clone(&self) -> Subst

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Subst

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

Formats the value using the given formatter.

impl Default for Subst

fn default() -> Subst

Returns the "default value" for a type.

impl<'_> Index<&'_ Var> for Subst

type Output = Id

The returned type after indexing.

fn index(&self, var: &Var) -> &Self::Output

Performs the indexing (container[index]) operation.