Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Pre-computed index of line-start byte offsets for a source string.

Construct with LineIndex::new, then call position or span to convert rowan TextRange values into AST Position / Span.

Implementations

impl LineIndex

pub fn new(source: &str) -> Self

Build a line index from the full source text.

pub fn position(&self, offset: usize) -> Position

Convert a byte offset to a 1-based Position.

pub fn span(&self, range: TextRange) -> Span

Convert a rowan TextRange to an AST Span.