Struct Span 

pub struct Span {
    pub start: u32,
    pub end: u32,
    pub capture: String,
    pub pattern_index: u32,
}

A span of highlighted text.

Spans come from grammar parsers and contain the raw capture name (e.g., “keyword.function”, “include”, “string.special.symbol”). The capture name is later mapped to a theme slot for rendering.

Fields

start: u32

Byte offset where the span starts (inclusive).

end: u32

Byte offset where the span ends (exclusive).

capture: String

The capture name from the grammar’s highlight query.

Examples: “keyword”, “function.builtin”, “include”, “storageclass” All are mapped to theme slots via arborium_theme::tag_for_capture().

pattern_index: u32

Pattern index from the query (higher = later in highlights.scm = higher priority).

When two spans have the exact same (start, end) range, the one with higher pattern_index wins during deduplication. This matches the tree-sitter convention where later patterns in a query override earlier ones.

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Span

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

Formats the value using the given formatter.

impl PartialEq for Span

fn eq(&self, other: &Span) -> 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 Eq for Span

impl StructuralPartialEq for Span