Struct Span 

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

Byte-Offset-Bereich [start, end) im Source-Text.

Halb-offenes Intervall: start inklusive, end exklusive. Eine Zero-length-Span (start == end) markiert eine Position ohne Inhalt — typisch fuer EOF-Caret oder Insertion-Vorschlaege.

Fields

start: usize

Startposition (inklusive, byte-offset).

end: usize

Endposition (exklusive, byte-offset).

Implementations

impl Span

pub const SYNTHETIC: Self

Synthetische Span ohne Quellort. Wird fuer interne, nicht-quellbasierte Diagnostiken verwendet (z.B. Grammar-Konstruktionsfehler).

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

Konstruiert eine neue Span aus Start- und End-Offset.

pub const fn point(at: usize) -> Self

Span mit Laenge 0 an einer Position (z.B. EOF-Marker).

pub const fn len(&self) -> usize

Anzahl der ueberdeckten Bytes.

pub const fn is_empty(&self) -> bool

true, wenn Start == End (Zero-length).

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

Liefert die kleinste Span, die beide ueberdeckt. Symmetrisch.

pub const fn contains_offset(&self, byte_offset: usize) -> bool

true, wenn byte_offset innerhalb dieser Span liegt.

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 Display for Span

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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 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 Copy for Span

impl Eq for Span

impl StructuralPartialEq for Span