Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Sorted prefix-sums of line-start byte offsets in a single source file.

Cheap to clone (it owns one Vec<u32>); cheap to query (binary search).

Implementations

impl LineIndex

pub fn build(src: &str) -> Self

Build a LineIndex from a source string. O(n).

Files larger than u32::MAX saturate at the cap; the loader already rejects files above 4 MiB, so this is a defence-in-depth guard, not the primary cap.

pub fn locate(&self, byte: u32) -> LineCol

Resolve a byte offset to a 1-based LineCol.

Returns (1, 1) when byte == 0 and the file is empty. Out-of-range bytes (> file length) saturate at the last known line’s column.

Trait Implementations

impl Clone for LineIndex

fn clone(&self) -> LineIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LineIndex

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

Formats the value using the given formatter.