Struct PosMap 

pub struct PosMap { /* private fields */ }

A flat position map over a batch of disjoint replacements, mapping pre-edit positions to post-edit ones. See the module docs.

Implementations

impl PosMap

pub fn new() -> Self

An empty map (the identity: every position maps to itself).

pub fn is_empty(&self) -> bool

Whether this map is the identity — it holds no steps, so every position maps to itself. (A same-length step still counts: it maps interior positions to an edge, so it is not empty.)

pub fn push(&mut self, start: usize, old_len: usize, new_len: usize)

Record a replacement: [start, start + old_len) (old coords) became new_len units. A no-op span (old_len == new_len == 0) is ignored. Steps are expected disjoint; they’re kept sorted by start.

pub fn map(&self, pos: usize, assoc: Assoc) -> usize

Map a flat position from pre-edit to post-edit coordinates. assoc decides which edge a position inside a replaced span lands on.

pub fn map_range(&self, range: PosRange, assoc: Assoc) -> PosRange

Map both endpoints of a PosRange with the same assoc (so a collapsed range stays collapsed).

pub fn from_pos_edits(edits: &[PosEdit]) -> Self

Build a map from a disjoint batch of edits (the same batch passed to apply_pos_edits). Positions are taken in the pre-edit coordinate system; mark/attr edits contribute no step.

Trait Implementations

impl Clone for PosMap

fn clone(&self) -> PosMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PosMap

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

Formats the value using the given formatter.

impl Default for PosMap

fn default() -> PosMap

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PosMap

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for PosMap

fn eq(&self, other: &PosMap) -> 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 Serialize for PosMap

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for PosMap

impl StructuralPartialEq for PosMap