Struct Span 

pub struct Span {
    pub start: u32,
    pub end: u32,
}

Fields

start: u32

end: u32

Implementations

impl Span

pub const fn empty() -> Self

pub fn is_empty(&self) -> bool

pub fn len(&self) -> u32

pub fn or(&self, other: Self) -> Self

Return self if not empty, or the other span if self is empty

pub fn to(&self, other: Self) -> Self

Get the combined span that encompasses both spans. The order does not matter.

pub fn skip(&self, skip: Self) -> Self

Take the current span, but skip the start until the skip span has been passed

pub fn start_from(&self, start: Self) -> Self

Take the current span, but skip the first part and start from the given start span

pub fn collapse_to_end(&self) -> Span

Discard the span and keep a zero-length span at the end value

pub fn collapse_to_start(&self) -> Span

Discard the span and keep a zero-length span at the start value

pub fn overlaps(&self, other: Self) -> bool

Returns true if the two spans have some overlap

pub fn is_selected_at(&self, offset: u32) -> bool

Returns true if a cursor at the given offset would select the span

Note that one offset can select multiple non-overlapping (but touching) spans!

pub fn until_end_of(&self, other: Self) -> Self

Take the start of self until the end of other (max is end of self)

pub fn until_start_of(&self, other: Self) -> Self

Take the start of self until the start of other (max is end of self)

Trait Implementations

impl Clone for Span

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Span

impl Debug for Span

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

Formats the value using the given formatter.

impl Default for Span

fn default() -> Self

Returns the “default value” for a type.

impl Display for Span

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

Formats the value using the given formatter.

impl Eq for Span

impl<'a> From<&'a Span> for Range<u32>

fn from(value: &'a Span) -> Self

Converts to this type from the input type.

impl<'a> From<&'a Span> for Range<usize>

fn from(value: &'a Span) -> Self

Converts to this type from the input type.

impl From<(u32, u32)> for Span

fn from(value: (u32, u32)) -> Self

Converts to this type from the input type.

impl From<Range<u32>> for Span

fn from(value: Range<u32>) -> Self

Converts to this type from the input type.

impl From<Range<usize>> for Span

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

Converts to this type from the input type.

impl From<Span> for Range<u32>

fn from(value: Span) -> Self

Converts to this type from the input type.

impl From<Span> for Range<usize>

fn from(value: Span) -> Self

Converts to this type from the input type.

impl Hash for Span

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Span

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl Span for Span

type Context = ()

Extra context used in a span.

type Offset = u32

A type representing a span’s start or end offset from the start of the input.

fn new(_context: Self::Context, range: Range<Self::Offset>) -> Self

Create a new span given a context and an offset range.

fn context(&self) -> Self::Context

Return the span’s context.

fn start(&self) -> Self::Offset

Return the start offset of the span.

fn end(&self) -> Self::Offset

Return the end offset of the span.

fn to_end(&self) -> Self

where Self: Sized,

Turn this span into a zero-width span that starts and ends at the end of the original.

fn union(&self, other: Self) -> Self

where Self::Context: PartialEq + Debug, Self::Offset: Ord, Self: Sized,

Combine two assumed-contiguous spans together into a larger span that encompasses both (and anything between).

impl StructuralPartialEq for Span