Enum Expr 

pub enum Expr {
    Alt {
        alts: Vec<Expr>,
    },
    Seq {
        items: Vec<Expr>,
    },
    Match {
        arms: Vec<Expr>,
    },
    Repeat {
        min: Option<u64>,
        max: Option<u64>,
        body: Box<Expr>,
    },
    Optional {
        body: Box<Expr>,
    },
    Ref {
        name: String,
        span: Span,
    },
    Literal {
        value: String,
        span: Span,
    },
    Group {
        body: Box<Expr>,
    },
}

Variants

Alt

Alternatives separated by |.

Fields

alts: Vec<Expr>

Seq

Juxtaposed sequence.

Fields

items: Vec<Expr>

Match

match a | b | c — first-class choice of match arms.

Fields

arms: Vec<Expr>

Repeat

repeat { ... } or repeat(0..) { ... }

Fields

min: Option<u64>

max: Option<u64>

body: Box<Expr>

Optional

optional { ... }

Fields

body: Box<Expr>

Ref

Reference to a rule or token name.

Fields

name: String

span: Span

Literal

String literal (auto-inferred token).

Fields

value: String

span: Span

Group

Fields

body: Box<Expr>

Implementations

impl Expr

pub fn seq(items: Vec<Expr>) -> Self

pub fn alt(alts: Vec<Expr>) -> Self

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl Eq for Expr

impl PartialEq for Expr

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Expr

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Expr