Struct Span 

pub struct Span { /* private fields */ }

Represents a span of source.

Implementations

impl Span

pub const fn new(start: usize, len: usize) -> Span

Creates a new span from the given start and length.

pub fn start(&self) -> usize

Gets the start of the span.

pub fn end(&self) -> usize

Gets the noninclusive end of the span.

pub fn len(&self) -> usize

Gets the length of the span.

pub fn is_empty(&self) -> bool

Determines if the span is empty.

pub fn contains(&self, offset: usize) -> bool

Determines if the span contains the given offset.

pub fn intersect(self, other: Span) -> Option<Span>

Calculates an intersection of two spans, if one exists.

If spans are adjacent, a zero-length span is returned.

Returns None if the two spans are disjoint.

Examples

assert_eq!(
    Span::intersect(Span::new(0, 10), Span::new(5, 10)),
    Some(Span::new(5, 5)),
);

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Span

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

Formats the value using the given formatter.

impl Display for Span

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

Formats the value using the given formatter.

impl From<Range<usize>> for Span

fn from(value: Range<usize>) -> Span

Converts to this type from the input type.

impl From<TextRange> for Span

fn from(value: TextRange) -> Span

Converts to this type from the input type.

impl Ord for Span

fn cmp(&self, other: &Span) -> 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 Span

fn eq(&self, other: &Span) -> 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 Span

fn partial_cmp(&self, other: &Span) -> 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 Span

impl Eq for Span

impl StructuralPartialEq for Span