Struct Span 

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

Represents a span of text in the input for error reporting.

Spans provide precise location information including both byte positions and line/column coordinates for better error reporting and debugging.

Fields

start: usize

Start position in the input (byte offset)

end: usize

End position in the input (byte offset)

Implementations

impl Span

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

Creates a new span.

pub fn single(position: usize) -> Span

Creates a span for a single position.

pub fn len(&self) -> usize

Returns the length of the span.

pub fn is_empty(&self) -> bool

Checks if the span is empty.

pub fn contains(&self, position: usize) -> bool

Checks if this span contains the given position.

pub fn merge(&self, other: &Span) -> Span

Merges two spans into a single span covering both.

pub fn to_enhanced(&self, input: &str) -> EnhancedSpan

Converts this span to an enhanced span with line/column information.

pub fn extract<'a>(&self, input: &'a str) -> &'a str

Extracts the text covered by this span from the input.

pub fn context_window(&self, input: &str, context_size: usize) -> ContextWindow

Returns a context window around this span.

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<(), Error>

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Span