Struct Classes 

pub struct Classes<'a> { /* private fields */ }

A borrowable view over an element’s class list.

Two representations back the same query surface:

• Classes::from_slice borrows a &'a [&'a str] directly — used by NodeRef, it is zero-allocation (a compile-time guarantee when the source is &'static str).
• Classes::from_vec owns a Vec<&'a str> — used by OwnedNode, it costs one Vec allocation per call (acceptable; the hot path uses NodeRef).

Use as_slice for iteration (&[&str]) rather than iter() so both representations unify behind a single concrete return type.

Implementations

impl<'a> Classes<'a>

pub fn from_slice(slice: &'a [&'a str]) -> Self

Zero-allocation view over a borrowed slice. The NodeRef path uses this — when slice is &'static [&'static str] no heap allocation occurs at any point.

pub fn from_vec(v: Vec<&'a str>) -> Self

Owning view built from an existing Vec<&str>. Used by OwnedNode which stores Strings and must materialize &str borrows per call.

pub fn as_slice(&self) -> &[&'a str]

Unified read-only access to the underlying class names, regardless of representation. Prefer this over an iter() — both reprs return the same concrete &[&str].

pub fn contains(&self, name: &str) -> bool

Whether name is present (case-sensitive).

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize