Struct Span 

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

Span represents a range of a piece of source code. It counts by byte offset, so it’s 0-based.

Offsets are u32 (matching oxc convention); sources larger than 4 GiB are rejected by the parser up front.

Every AST node carries spans into the original source, including inline nodes, whose offsets are never derived from a rebuilt buffer.

Fields

start: u32

Start offset. (Inclusive)

end: u32

End offset. (Exclusive)

Implementations

impl Span

pub fn new(start: u32, end: u32) -> Self

pub fn empty(at: u32) -> Self

A zero-width span at the given offset. Covers no characters, but its position may still be meaningful (e.g. a marker between two tokens).

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

Whether offset lies inside the span (start <= offset < end).

pub fn at(base: u32, range: Range<usize>) -> Self

A span for an in-line byte range relative to base.

pub fn slice(self, source: &str) -> &str

The source text this span covers.

pub fn is_empty(self) -> bool

Whether the span covers no characters.

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 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: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Span