Enum pomsky_syntax::exprs::Rule

pub enum Rule<'i> {
    Literal(Literal<'i>),
    CharClass(CharClass),
    Group(Group<'i>),
    Alternation(Alternation<'i>),
    Repetition(Box<Repetition<'i>>),
    Boundary(Boundary),
    Lookaround(Box<Lookaround<'i>>),
    Variable(Variable<'i>),
    Reference(Reference<'i>),
    Range(Range),
    StmtExpr(Box<StmtExpr<'i>>),
    Grapheme,
}

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

Variants

Literal(Literal<'i>)

A string literal

CharClass(CharClass)

A character class

Group(Group<'i>)

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

Alternation(Alternation<'i>)

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

Repetition(Box<Repetition<'i>>)

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<'i>>)

A (positive or negative) lookahead or lookbehind.

Variable(Variable<'i>)

An variable that has been declared before.

Reference(Reference<'i>)

A backreference or forward reference.

Range(Range)

A range of integers

StmtExpr(Box<StmtExpr<'i>>)

An expression preceded by a modifier such as enable lazy;

Grapheme

A Unicode grapheme

Implementations

impl<'i> Rule<'i>

pub fn span(&self) -> Span

Returns the span of this rule

Trait Implementations

impl<'i> Clone for Rule<'i>

fn clone(&self) -> Rule<'i>

Returns a copy of the value.

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

Performs copy-assignment from source.