Struct Span 

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

A half-open byte range start..end into the original source string. These are absolute UTF-8 byte offsets from the start of the document (not line/column); use LineIndex to translate an offset into a line and column.

Fields

start: usize

Inclusive start byte offset.

end: usize

Exclusive end byte offset (one past the last byte).

Implementations

impl Span

pub const fn new(start: usize, end: usize) -> Self

Construct a span from a start and end byte offset.

pub const fn len(self) -> usize

The length of the span in bytes (0 if end <= start).

pub const fn is_empty(self) -> bool

Whether the span covers zero bytes.

pub const fn contains(self, other: Span) -> bool

Whether other lies entirely within this span.

pub const fn is_valid(self) -> bool

Whether start <= end (a well-formed range).

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 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() -> Span

Returns the “default value” for a type.

impl Eq for Span

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: &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 StructuralPartialEq for Span