Struct BaseSpan 

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

A byte-offset range in source text.

Spans are Copy and cheap to pass around. Use Span::merge to combine spans when building compound expressions.

Fields

start: usize

Byte offset of the first character (inclusive).

end: usize

Byte offset past the last character (exclusive).

Implementations

impl Span

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

Creates a span from byte offsets.

No validation is performed; start may exceed end.

pub fn merge(self, other: Span) -> Span

Creates a span covering from the start of self to the end of other.

Useful for building compound expressions: the span of a + b is a.span.merge(b.span).

pub fn len(&self) -> usize

Returns the length of the span in bytes.

pub fn is_empty(&self) -> bool

Returns true if this span covers no bytes.

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 Default for Span

fn default() -> Span

Returns the “default value” for a type.

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 Copy for Span

impl Eq for Span

impl StructuralPartialEq for Span