Enum RKind 

pub enum RKind {
    Empty,
    Set(CharSet),
    Cat(Vec<RNode>),
    Alt(Vec<RNode>),
    Repeat {
        node: Box<RNode>,
        min: u64,
        max: Option<u64>,
        greedy: bool,
    },
    Assert(TermId),
    LookAhead {
        neg: bool,
        node: Box<RNode>,
    },
    LookBehind {
        neg: bool,
        node: Box<RNode>,
    },
}

Node shapes.

Variants

Empty

Matches the empty string.

Set(CharSet)

One symbol from the set.

Cat(Vec<RNode>)

Sequence.

Alt(Vec<RNode>)

Ordered alternation (backtracking engines try left to right).

Repeat

Repetition; max == None is unbounded.

Fields

node: Box<RNode>

Body.

min: u64

Minimum count.

max: Option<u64>

Maximum count.

greedy: bool

Greedy (try more first) or lazy.

Assert(TermId)

Zero-width assertion, evaluated by the term store at a position.

LookAhead

(?=x) / (?!x).

Fields

neg: bool

Negative form.

node: Box<RNode>

Body.

LookBehind

(?<=x) / (?<!x).

Fields

neg: bool

Negative form.

node: Box<RNode>

Body.

Trait Implementations

impl Clone for RKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RKind

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

Formats the value using the given formatter.