Struct Span 

pub struct Span {
    pub lo: BytePos,
    pub hi: BytePos,
}

A span of source code, represented as a half-open byte range [lo, hi).

Fields

lo: BytePos

The start of the span (inclusive).

hi: BytePos

The end of the span (exclusive).

Implementations

impl Span

pub const DUMMY: Self

A dummy span for generated code or when location is irrelevant.

pub const fn new(lo: BytePos, hi: BytePos) -> Self

Create a new span from byte positions.

pub const fn from_raw(lo: u32, hi: u32) -> Self

Create a span from raw byte offsets.

pub const fn is_dummy(self) -> bool

Check if this is a dummy span.

pub const fn len(self) -> u32

Get the length of the span in bytes.

pub const fn is_empty(self) -> bool

Check if the span is empty.

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

Merge two spans into one that covers both.

pub const fn to(self, other: Self) -> Self

Create a span that covers from the start of self to the end of other.

pub const fn shrink_to_lo(self) -> Self

Shrink the span to a single point at the start.

pub const fn shrink_to_hi(self) -> Self

Shrink the span to a single point at the end.

pub const fn contains(self, pos: BytePos) -> bool

Check if this span contains the given byte position.

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() -> Self

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