Enum exprz::Expr

pub enum Expr<E> where
    E: Expression,  {
    Atom(E::Atom),
    Group(E::Group),
}

Canonical Concrete Expression Type

Variants

Atom(E::Atom)

Atomic element

Group(E::Group)

Grouped expression

Implementations

impl<E> Expr<E> where
    E: Expression, 

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

Checks if the Expr is an atomic expression.

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

Checks if the Expr is a grouped expression.

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

Converts from an Expr<E> to an Option<E::Atom>.

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

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

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

Converts from an Expr<E> to an Option<E::Group>.

#[must_use]pub fn group_ref(&self) -> Option<&E::Group>

Converts from an &Expr<E> to an Option<&E::Group>.

pub fn map<O, F>(self, f: F) -> O where
    E::Group: IntoIterator<Item = E>,
    O: Expression,
    O::Group: FromIterator<O>,
    F: FnMut(E::Atom) -> O::Atom, 

Extends a function on Atoms to a function on Expressions.

pub fn substitute<F>(self, f: F) -> E where
    E::Group: FromIterator<E> + IntoIterator<Item = E>,
    F: FnMut(E::Atom) -> E, 

Substitutes an Expression into each Atom of self.

Trait Implementations

impl<E> Clone for Expr<E> where
    E: Expression,
    E::Atom: Clone,
    E::Group: FromIterator<E>, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<E: Debug> Debug for Expr<E> where
    E: Expression,
    E::Atom: Debug,
    E::Group: Debug, 

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

Formats the value using the given formatter.

impl<E> Default for Expr<E> where
    E: Expression,
    E::Group: FromIterator<E>, 

fn default() -> Self

Returns the empty group expression.

impl<E> Eq for Expr<E> where
    E: Expression,
    E::Atom: PartialEq, 

impl<'e, E> From<&'e Expr<E>> for ExprRef<'e, E> where
    E: Expression, 

#[must_use]fn from(expr: &'e Expr<E>) -> Self

Performs the conversion.

impl<A> From<Expr<A>> for Expr<Expr<A>>

This is supported on crate feature alloc only.

fn from(expr: Expr<A>) -> Self

Performs the conversion.

impl<T> From<Expr<T, usize, usize>> for Expr<Expr<T>>

This is supported on crate feature buffered only.

fn from(expr: Expr<T>) -> Self

Performs the conversion.

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

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

Performs the conversion.

impl<A, G> From<MultiExpr<A, G>> for Expr<MultiExpr<A, G>>

This is supported on crate features multi and alloc only.

fn from(expr: MultiExpr<A, G>) -> Self

Performs the conversion.

impl<E> FromStr for Expr<E> where
    E: Expression,
    E::Atom: FromIterator<char>,
    E::Group: FromIterator<E>, 

This is supported on crate feature parse only.

type Err = Error<FromCharactersParseError>

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl<L, R> PartialEq<Expr<R>> for Expr<L> where
    L: Expression,
    R: Expression,
    L::Atom: PartialEq<R::Atom>, 

fn eq(&self, other: &Expr<R>) -> bool

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

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

This method tests for !=.