Enum RuleKind 

pub enum RuleKind {
    Sequence(Vec<Rule>),
    Choice(Vec<Rule>),
    Group(Delimiter, Box<Rule>),
    Repeat(RepeatRule),
    Optional(Box<Rule>),
    Punctuation(String),
    Keyword(String),
    Other(String),
    Builtin(String),
}

A specific grammar rule variant.

Variants

Sequence(Vec<Rule>)

Matches a sequence of rules, one after another.

Choice(Vec<Rule>)

Begins all rules at the same point, using the first one that matches.

Group(Delimiter, Box<Rule>)

Matches inside a token group.

Repeat(RepeatRule)

A repeating rule, delimited with * or +.

Optional(Box<Rule>)

Makes a rule optional (allowed to fail). Delimited with ?.

Punctuation(String)

Matches a punctuation token.

Keyword(String)

Matches a keyword token.

Other(String)

Matches a different rule.

Builtin(String)

Matches a built-in rule (denoted with @).

Implementations

impl RuleKind

pub fn with(self, span: impl Into<Span>) -> Rule

Trait Implementations

impl Clone for RuleKind

fn clone(&self) -> RuleKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RuleKind

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

Formats the value using the given formatter.

impl Display for RuleKind

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

Formats the value using the given formatter.

impl Hash for RuleKind

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 Ord for RuleKind

fn cmp(&self, other: &RuleKind) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RuleKind

fn eq(&self, other: &RuleKind) -> 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 PartialOrd for RuleKind

fn partial_cmp(&self, other: &RuleKind) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for RuleKind

impl StructuralPartialEq for RuleKind