Struct Span 

#[non_exhaustive]
pub struct Span {
    pub file: Arc<Path>,
    pub byte_range: Range<u32>,
    pub line: u32,
    pub column: u32,
}

Byte-offset + line/column span into a source file.

Spans are cheap to clone (Arc<Path> is a single ref-count bump). Per [10-data-model.md § 2.5 (I-IR-1)], every Span in the workspace IR resolves to a path underneath the workspace root — discovery enforces this; Span itself does not validate the path (it accepts already-trusted values from the loader).

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

file: Arc<Path>

Path of the source file the span points into.

byte_range: Range<u32>

Half-open byte range [start, end) into the file’s contents.

line: u32

1-based line number of byte_range.start.

column: u32

1-based column (in bytes) of byte_range.start.

Implementations

impl Span

pub fn new( file: Arc<Path>, byte_range: Range<u32>, line: u32, column: u32, ) -> Result<Self, ValidationError>

Construct a span, validating that byte_range is well-ordered and line/column are 1-based.

Errors

Returns ValidationError::Shape if any invariant is violated.

pub fn synthetic() -> Self

A synthetic 1-byte span used for IR nodes that did not originate in a file (e.g. defaults injected by the evaluator). Carries an empty path.

pub fn byte_range_usize(&self) -> Range<usize>

Convenience accessor for the byte range as a usize slice into a source buffer.

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<'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 Eq for Span

impl StructuralPartialEq for Span