Struct Span 

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

Byte span of an AST node.

[start, end) into the original source, same basis as Token::start/ Token::end. Covers every (non-virtual) token that belongs to the node — first token’s start to last token’s end.

Invariants the parser maintains (checked over the corpus by render_from_ast): a child’s span is contained in its parent’s span, and sibling spans are ordered and non-overlapping. Trivia (comments, blank lines) live between sibling spans.

Fields

start: ByteOffset

Inclusive byte offset at which the node starts.

end: ByteOffset

Exclusive byte offset at which the node ends.

Implementations

impl Span

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

Create a span from already-typed byte offsets.

Use Self::from_usize only at parser/source-slicing boundaries where raw byte offsets are being converted deliberately.

use daml_parser::ast::Span;

let _ = Span::new(1usize, 2usize);

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

Convert raw byte offsets into a typed parser span.

pub const fn start_usize(self) -> usize

Raw start byte offset for source slicing and external interop.

pub const fn end_usize(self) -> usize

Raw exclusive end byte offset for source slicing and external interop.

pub const fn is_valid(&self) -> bool

True when the span is well-formed (start <= end).

pub const fn is_empty(&self) -> bool

True for a zero-width but still valid span.

pub const fn range(&self) -> Range<usize>

pub fn get<'a>(&self, source: &'a str) -> Option<&'a str>

pub const fn contains(&self, other: &Self) -> bool

self fully contains other.

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 Copy for Span

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 Eq for Span

impl Ord for Span

fn cmp(&self, other: &Span) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

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 PartialOrd for Span

fn partial_cmp(&self, other: &Span) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Span