Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Precomputed line, character, and UTF-16 offset tables for a source string.

Offsets passed to lookup methods are clamped to the source length. Returned line and column coordinates are always valid 1-based values.

Implementations

impl LineIndex

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

Builds line and column lookup tables for source.

pub fn line_col(&self, offset: TextSize) -> ByteLineCol

Maps a byte offset to a 1-based line and byte column, clamping past EOF.

pub fn char_line_col(&self, offset: TextSize) -> CharLineCol

Maps a byte offset to a 1-based line and Unicode scalar column.

Non-UTF-8-boundary offsets snap to the previous character boundary.

pub fn utf16_col(&self, line: LineNumber, byte_col: ByteColumn) -> Utf16Offset

Returns the UTF-16 code-unit offset from the start of line to byte_col.

Both coordinates must be valid 1-based values; zero cannot be represented by LineNumber or ByteColumn.

pub fn utf16_range(&self, range: TextRange) -> (Utf16Offset, Utf16Offset)

Maps a byte range to UTF-16 start/end offsets, clamping to source bounds.

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.

impl Eq for LineIndex

impl PartialEq for LineIndex

fn eq(&self, other: &LineIndex) -> 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 StructuralPartialEq for LineIndex