Enum GenericExpr 

pub enum GenericExpr<Head, Leaf> {
    Var(Span, Leaf),
    Call(Span, Head, Vec<GenericExpr<Head, Leaf>>),
    Lit(Span, Literal),
}

Variants

Var(Span, Leaf)

Call(Span, Head, Vec<GenericExpr<Head, Leaf>>)

Lit(Span, Literal)

Implementations

impl<Head: Clone + Display, Leaf: Hash + Clone + Display + Eq> GenericExpr<Head, Leaf>

pub fn span(&self) -> Span

pub fn is_var(&self) -> bool

pub fn get_var(&self) -> Option<Leaf>

pub fn ast_size(&self) -> usize

pub fn walk(&self, pre: &mut impl FnMut(&Self), post: &mut impl FnMut(&Self))

pub fn fold<Out>(&self, f: &mut impl FnMut(&Self, Vec<Out>) -> Out) -> Out

pub fn visit_exprs(self, f: &mut impl FnMut(Self) -> Self) -> Self

Applys f to all sub-expressions (including self) bottom-up, collecting the results.

pub fn subst<Head2, Leaf2>( &self, subst_leaf: &mut impl FnMut(&Span, &Leaf) -> GenericExpr<Head2, Leaf2>, subst_head: &mut impl FnMut(&Head) -> Head2, ) -> GenericExpr<Head2, Leaf2>

subst replaces occurrences of variables and head symbols in the expression.

pub fn subst_leaf<Leaf2>( &self, subst_leaf: &mut impl FnMut(&Span, &Leaf) -> GenericExpr<Head, Leaf2>, ) -> GenericExpr<Head, Leaf2>

pub fn vars(&self) -> impl Iterator<Item = Leaf> + '_

Trait Implementations

impl<Head: Clone, Leaf: Clone> Clone for GenericExpr<Head, Leaf>

fn clone(&self) -> GenericExpr<Head, Leaf>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Head: Debug, Leaf: Debug> Debug for GenericExpr<Head, Leaf>

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

Formats the value using the given formatter.

impl<Head, Leaf> Display for GenericExpr<Head, Leaf>

where Head: Display, Leaf: Display,

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

Formats the value using the given formatter.

impl<Head: Hash, Leaf: Hash> Hash for GenericExpr<Head, Leaf>

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<Head: PartialEq, Leaf: PartialEq> PartialEq for GenericExpr<Head, Leaf>

fn eq(&self, other: &GenericExpr<Head, Leaf>) -> 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<Head: Eq, Leaf: Eq> Eq for GenericExpr<Head, Leaf>

impl<Head, Leaf> StructuralPartialEq for GenericExpr<Head, Leaf>