Struct Span

pub struct Span { /* private fields */ }

A Span records what portion of the user’s input something (e.g. a lexeme or production) references (i.e. the Span doesn’t hold a reference / copy of the actual input).

Implementations

impl Span

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

Create a new span starting at byte start and ending at byte end.

Panics

If end is less than start.

pub fn start(&self) -> usize

Byte offset of the start of the span.

pub fn end(&self) -> usize

Byte offset of the end of the span.

pub fn len(&self) -> usize

Length in bytes of the span.

pub fn is_empty(&self) -> bool

Returns true if this Span covers 0 bytes, or false otherwise.

Trait Implementations

impl<'__de, __Context> BorrowDecode<'__de, __Context> for Span

fn borrow_decode<__D>(decoder: &mut __D) -> Result<Span, DecodeError>

where __D: BorrowDecoder<'__de, Context = __Context>,

Attempt to decode this type with the given BorrowDecode.

impl Clone for Span

fn clone(&self) -> Span

Returns a copy 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<__Context> Decode<__Context> for Span

fn decode<__D>(decoder: &mut __D) -> Result<Span, DecodeError>

where __D: Decoder<Context = __Context>,

Attempt to decode this type with the given Decode.

impl Encode for Span

fn encode<__E>(&self, encoder: &mut __E) -> Result<(), EncodeError>

where __E: Encoder,

Encode a given type.

impl Hash for Span

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

where __H: Hasher,

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 ToTokens for Span

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.

impl Copy for Span

impl Eq for Span

impl StructuralPartialEq for Span