Struct Selector 

pub struct Selector {
    pub parts: Vec<SimpleSelector>,
    pub combinators: Vec<Combinator>,
}

A compound selector — one or more SimpleSelectors joined by Combinators. parts.len() == combinators.len() + 1. parts[0] is the leftmost (ancestor/sibling) end; parts.last() is the subject that is matched against the target node.

For a simple flat selector (no combinator) parts has one entry and combinators is empty.

Fields

parts: Vec<SimpleSelector>

combinators: Vec<Combinator>

Implementations

impl Selector

pub fn specificity(&self) -> u32

CSS specificity: sum of each part’s specificity. Combinators contribute 0.

pub fn matches( &self, target: &Node<'_>, ancestors: &[Node<'_>], prev_siblings: &[Node<'_>], state: Option<PseudoClass>, ) -> bool

Match against target given its ancestors (root → parent, exclusive of the target) and prev_siblings (oldest → the immediately preceding sibling, exclusive of the target). state is the pseudo-class active on the target; ancestors are always matched without pseudo-class.

Sibling combinator limitation (v1)

AdjacentSibling and GeneralSibling match the sibling against prev_siblings. If the rule continues leftward past the sibling combinator into a Descendant or Child step (e.g. .grandparent > .prev + .target), the next combinator is evaluated against the target’s own ancestors rather than the sibling’s ancestors. This may false-negative when the continuation requires introspecting the sibling’s subtree context. Fully recursive sibling-vs-ancestor context requires the adapter to supply sibling-of-sibling data, which is out of scope for v1. Chained sibling combinators (.a + .b + .c) walk the prev-sibling list correctly and do not hit this limitation.

Trait Implementations

impl Clone for Selector

fn clone(&self) -> Selector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selector

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

Formats the value using the given formatter.

impl PartialEq for Selector

fn eq(&self, other: &Selector) -> 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 StructuralPartialEq for Selector