Struct Span 

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

Lightweight source span for AST nodes. Stores byte offsets from the beginning of the source text.

Fields

start: usize

Start position (byte offset)

end: usize

End position (byte offset)

Implementations

impl Span

pub const DUMMY: Span

A dummy span for AST nodes without source location

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

Create a new span from start and end byte offsets

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

Merge two spans to create a span covering both

pub fn len(&self) -> usize

Get the length of the span in bytes

pub fn is_empty(&self) -> bool

Check if the span is empty

pub fn is_dummy(&self) -> bool

Check if this is a dummy span

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

Formats the value using the given formatter.

impl Default for Span

fn default() -> Span

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Span

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

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 Serialize for Span

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Span

impl Eq for Span

impl StructuralPartialEq for Span