Struct Span

pub struct Span(/* private fields */);

Implementations

impl Span

pub fn new(range: Range<usize>) -> Self

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

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

Methods from Deref<Target = Range<usize>>

pub fn contains<U>(&self, item: &U) -> bool

where Idx: PartialOrd<U>, U: PartialOrd<Idx> + ?Sized,

Returns true if item is contained in the range.

Examples

assert!(!(3..5).contains(&2));
assert!( (3..5).contains(&3));
assert!( (3..5).contains(&4));
assert!(!(3..5).contains(&5));

assert!(!(3..3).contains(&3));
assert!(!(3..2).contains(&3));

assert!( (0.0..1.0).contains(&0.5));
assert!(!(0.0..1.0).contains(&f32::NAN));
assert!(!(0.0..f32::NAN).contains(&0.5));
assert!(!(f32::NAN..1.0).contains(&0.5));

pub fn is_empty(&self) -> bool

Returns true if the range contains no items.

Examples

assert!(!(3..5).is_empty());
assert!( (3..3).is_empty());
assert!( (3..2).is_empty());

The range is empty if either side is incomparable:

assert!(!(3.0..5.0).is_empty());
assert!( (3.0..f32::NAN).is_empty());
assert!( (f32::NAN..5.0).is_empty());

Trait Implementations

impl AsMut<Range<usize>> for Span

fn as_mut(&mut self) -> &mut Range<usize>

Converts this type into a mutable reference of the (usually inferred) input type.

impl AsRef<Range<usize>> for Span

fn as_ref(&self) -> &Range<usize>

Converts this type into a shared reference of the (usually inferred) input type.

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 Default for Span

fn default() -> Span

Returns the “default value” for a type.

impl Deref for Span

type Target = Range<usize>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for Span

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl From<Range<usize>> for Span

fn from(value: Range<usize>) -> Self

Converts to this type from the input type.

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 Eq for Span

impl StructuralPartialEq for Span