Struct GeneratedOffsetLookup 

pub struct GeneratedOffsetLookup<'a> { /* private fields */ }

Converts generated UTF-8 byte offsets into source-map generated positions.

V8 coverage ranges are often reported as byte offsets in generated code, while source maps use generated line and UTF-16 column pairs. This helper builds a reusable line index for one generated asset and converts offsets before forwarding them to a source map lookup.

Implementations

impl<'a> GeneratedOffsetLookup<'a>

pub fn new(generated_source: &'a str) -> Self

Create a lookup for one generated source asset.

pub fn line_count(&self) -> usize

Number of generated lines tracked by this lookup.

pub fn total_bytes(&self) -> usize

Total byte length of the generated source.

pub fn byte_offset_to_position( &self, byte_offset: u32, ) -> Option<GeneratedLocation>

Convert a generated UTF-8 byte offset to a 0-based line and UTF-16 column.

Returns None when the offset is out of bounds, does not fit in u32, or points into the middle of a UTF-8 code point. Offsets that point at a line terminator resolve to the end column of that line. Offsets after a line terminator resolve to column 0 of the next line.

pub fn original_position_for_offset<M>( &self, source_map: &M, byte_offset: u32, ) -> Option<OriginalLocation>

where M: OriginalPositionLookup + ?Sized,

Look up the original source position for a generated byte offset.

pub fn byte_offsets_to_positions( &self, byte_offsets: &[u32], ) -> Option<Vec<GeneratedLocation>>

Convert multiple generated byte offsets to generated positions.

Returns None if any offset is invalid.

pub fn original_positions_for_offsets<M>( &self, source_map: &M, byte_offsets: &[u32], ) -> Vec<Option<OriginalLocation>>

where M: OriginalPositionLookup + ?Sized,

Look up original source positions for multiple generated byte offsets.

Trait Implementations

impl<'a> Clone for GeneratedOffsetLookup<'a>

fn clone(&self) -> GeneratedOffsetLookup<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for GeneratedOffsetLookup<'a>

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

Formats the value using the given formatter.