Struct Span 

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

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: usize

end: usize

Implementations

impl Span

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

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 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 StructuralPartialEq for Span