Struct egg::SymbolLang

pub struct SymbolLang {
    pub op: Symbol,
    pub children: Vec<Id>,
}

A simple language used for testing.

Fields

op: Symbol

The operator for an enode

children: Vec<Id>

The enode’s children Ids

Implementations

impl SymbolLang

pub fn new(op: impl Into<Symbol>, children: Vec<Id>) -> Self

Create an enode with the given string and children

pub fn leaf(op: impl Into<Symbol>) -> Self

Create childless enode with the given string

Trait Implementations

impl Clone for SymbolLang

fn clone(&self) -> SymbolLang

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SymbolLang

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

Formats the value using the given formatter.

impl Display for SymbolLang

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

Formats the value using the given formatter.

impl FromOp for SymbolLang

type Error = Infallible

The error type returned by from_op if its arguments do not represent a valid e-node.

fn from_op(op: &str, children: Vec<Id>) -> Result<Self, Self::Error>

Parse an e-node with operator op and children children.

impl Hash for SymbolLang

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 Language for SymbolLang

fn matches(&self, other: &Self) -> bool

Returns true if this enode matches another enode. This should only consider the operator, not the children Ids.

fn children(&self) -> &[Id]

Returns the children of this e-node.

fn children_mut(&mut self) -> &mut [Id]

Returns a mutable slice of the children of this e-node.

fn for_each<F: FnMut(Id)>(&self, f: F)

Runs a given function on each child Id.

fn for_each_mut<F: FnMut(&mut Id)>(&mut self, f: F)

Runs a given function on each child Id, allowing mutation of that Id.

fn try_for_each<E, F>(&self, f: F) -> Result<(), E> where
    F: FnMut(Id) -> Result<(), E>,
    E: Clone, 

Runs a falliable function on each child, stopping if the function returns an error.

fn len(&self) -> usize

Returns the number of the children this enode has.

fn is_leaf(&self) -> bool

Returns true if this enode has no children.

fn update_children<F: FnMut(Id) -> Id>(&mut self, f: F)

Runs a given function to replace the children.

fn map_children<F: FnMut(Id) -> Id>(self, f: F) -> Self

Creates a new enode with children determined by the given function.

fn fold<F, T>(&self, init: T, f: F) -> T where
    F: FnMut(T, Id) -> T,
    T: Clone, 

Folds over the children, given an initial accumulator.

fn all<F: FnMut(Id) -> bool>(&self, f: F) -> bool

Returns true if the predicate is true on all children. Does not short circuit.

fn any<F: FnMut(Id) -> bool>(&self, f: F) -> bool

Returns true if the predicate is true on any children. Does not short circuit.

fn join_recexprs<F, Expr>(&self, child_recexpr: F) -> RecExpr<Self> where
    F: FnMut(Id) -> Expr,
    Expr: AsRef<[Self]>, 

Make a RecExpr by mapping this enodes children to other RecExprs.

fn build_recexpr<F>(&self, get_node: F) -> RecExpr<Self> where
    F: FnMut(Id) -> Self, 

Build a RecExpr from an e-node.

impl Ord for SymbolLang

fn cmp(&self, other: &SymbolLang) -> 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<SymbolLang> for SymbolLang

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

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

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

This method tests for !=.

impl PartialOrd<SymbolLang> for SymbolLang

fn partial_cmp(&self, other: &SymbolLang) -> 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 SymbolLang

impl StructuralEq for SymbolLang

impl StructuralPartialEq for SymbolLang