Enum Rule 

pub enum Rule {
    Literal(Literal),
    CharClass(CharClass),
    Group(Group),
    Alternation(Alternation),
    Intersection(Intersection),
    Repetition(Box<Repetition>),
    Boundary(Boundary),
    Lookaround(Box<Lookaround>),
    Variable(Variable),
    Reference(Reference),
    Range(Range),
    StmtExpr(Box<StmtExpr>),
    Negation(Box<Negation>),
    Regex(Regex),
    Recursion(Recursion),
    Grapheme,
    Codepoint,
    Dot,
}

A parsed pomsky expression, which might contain more sub-expressions.

Variants

Literal(Literal)

A string literal

CharClass(CharClass)

A character class

Group(Group)

A group, i.e. a sequence of rules, possibly wrapped in parentheses.

Alternation(Alternation)

An alternation, i.e. a list of alternatives; at least one of them has to match.

Intersection(Intersection)

An intersection, i.e. a list of rules that all have to match at the same time.

Repetition(Box<Repetition>)

A repetition, i.e. a expression that must be repeated. The number of required repetitions is constrained by a lower and possibly an upper bound.

Boundary(Boundary)

A boundary (start of string, end of string or word boundary).

Lookaround(Box<Lookaround>)

A (positive or negative) lookahead or lookbehind.

Variable(Variable)

An variable that has been declared before.

Reference(Reference)

A backreference or forward reference.

Range(Range)

A range of integers

StmtExpr(Box<StmtExpr>)

An expression preceded by a modifier such as enable lazy;

Negation(Box<Negation>)

Negated expression

Regex(Regex)

A regex string, which is not escaped

Recursion(Recursion)

A regex string, which is not escaped

Grapheme

A Unicode grapheme

Codepoint

A Unicode code point

Dot

The dot

Implementations

impl Rule

pub fn span(&self) -> Span

Returns the span of this rule

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Rule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rule

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

Formats the value using the given formatter.