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 Hash for Subst

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, 

Feeds a slice of this type into the given Hasher.

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.

impl Ord for Subst

fn cmp(&self, other: &Subst) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Subst> for Subst

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<Subst> for Subst

fn partial_cmp(&self, other: &Subst) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Subst

impl StructuralEq for Subst

impl StructuralPartialEq for Subst