Struct Highlighter 

pub struct Highlighter { /* private fields */ }

One language’s parser + highlight query. Reparses on demand; the incremental edit-diff feed (0001 pillar 4) lands when the core reports edits — prototype correctness first, per-frame cost is invisible at demo file sizes.

Implementations

impl Highlighter

pub fn for_path(path: &str) -> Option<Self>

pub fn highlight( &mut self, rope: &Rope, first_byte: usize, last_byte: usize, ) -> Vec<Span>

Highlight spans intersecting [first_byte, last_byte) of the rope. Reparses only when the text changed. Owned: callers hold buffer borrows, so the visible-window clone (small) keeps lifetimes flat.