Enum exprz_core::ExprRef

pub enum ExprRef<'e, E> where
    E: 'e + Expression,  {
    Atom(&'e E::Atom),
    Group(<E::Group as IntoIteratorGen<E>>::IterGen),
}

Internal Reference to an Expression Type

Variants

Atom(&'e E::Atom)

Reference to an atomic expression

Group(<E::Group as IntoIteratorGen<E>>::IterGen)

Grouped expression IteratorGen

Implementations

impl<'e, E> ExprRef<'e, E> where
    E: Expression, 

#[must_use]pub fn is_atom(&self) -> bool

Check if the ExprRef is atomic.

#[must_use]pub fn is_group(&self) -> bool

Check if the ExprRef is a grouped expression IteratorGen.

#[must_use]pub fn atom(self) -> Option<&'e E::Atom>

Converts from an ExprRef<E> to an Option<&E::Atom>.

#[must_use]pub fn group(self) -> Option<<E::Group as IntoIteratorGen<E>>::IterGen>

Converts from an ExprRef<E> to an Option<E::Group::IterGen>.

pub fn unwrap_atom(self) -> &'e E::Atom

Returns the contained Atom value, consuming the self value.

Panics

Panics if the self value is a Group.

pub fn unwrap_group(self) -> <E::Group as IntoIteratorGen<E>>::IterGen

Returns the contained Group value, consuming the self value.

Panics

Panics if the self value is an Atom.

pub fn is_subexpression<'r, R>(&self, other: &ExprRef<'r, R>) -> bool where
    R: Expression,
    E::Atom: PartialEq<R::Atom>, 

Check if an Expression is a sub-tree of another Expression using PartialEq on their Atoms.

pub fn map_ref<O, F>(&self, f: F) -> O where
    O: Expression,
    O::Group: FromIterator<O>,
    F: FnMut(&E::Atom) -> O::Atom, 

Extend a function on &Atoms to a function on &Expressions.

pub fn substitute_ref<F>(&self, f: F) -> E where
    E::Group: FromIterator<E>,
    F: FnMut(&E::Atom) -> E, 

Substitute an Expression into each Atom of &self.

Trait Implementations

impl<'e, E> From<ExprRef<'e, E>> for Expr<E> where
    E::Atom: Clone,
    E::Group: FromIterator<E>,
    E: Expression, 

#[must_use]pub fn from(expr_ref: ExprRef<'e, E>) -> Self

Performs the conversion.

impl<'l, 'r, L, R> PartialEq<ExprRef<'r, R>> for ExprRef<'l, L> where
    L: Expression,
    R: Expression,
    L::Atom: PartialEq<R::Atom>, 

pub fn eq(&self, other: &ExprRef<'r, R>) -> bool

Check if two Expressions are equal using PartialEq on their Atoms.

#[must_use]pub fn ne(&self, other: &Rhs) -> bool

This method tests for !=.