Struct RopeIndex 

pub struct RopeIndex {
    pub line: usize,
    pub code_point: usize,
}

An index into a Rope data structure. Used to efficiently identify a particular position in a Rope. As Rope always uses Rust strings interally, code point indices represented in a RopeIndex are assumed to be UTF-8 code points (one byte each).

Note that it is possible for a RopeIndex to point past the end of the last line, as it can be used in exclusive ranges. In lines other than the last line, it should always refer to offsets before the trailing newline.

Fields

line: usize

The index of the line that this RopeIndex refers to.

code_point: usize

The index of the code point on the RopeIndex’s line in UTF-8 code points.

Note: This is not a Utf8CodeUnitLength in order to avoid continually having to unpack the inner value.

Implementations

impl RopeIndex

pub fn new(line: usize, code_point: usize) -> Self

Trait Implementations

impl Clone for RopeIndex

fn clone(&self) -> RopeIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RopeIndex

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

Formats the value using the given formatter.

impl Default for RopeIndex

fn default() -> RopeIndex

Returns the “default value” for a type.

impl MallocSizeOf for RopeIndex

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl Ord for RopeIndex

fn cmp(&self, other: &RopeIndex) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RopeIndex

fn eq(&self, other: &RopeIndex) -> 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 PartialOrd for RopeIndex

fn partial_cmp(&self, other: &RopeIndex) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for RopeIndex

impl Eq for RopeIndex

impl StructuralPartialEq for RopeIndex