pub struct RangeFull;
std
only.Expand description
An unbounded range (..
).
RangeFull
is primarily used as a slicing index, its shorthand is ..
.
It cannot serve as an Iterator
because it doesn’t have a starting point.
§Examples
The ..
syntax is a RangeFull
:
assert_eq!(.., std::ops::RangeFull);
It does not have an IntoIterator
implementation, so you can’t use it in
a for
loop directly. This won’t compile:
for i in .. {
// ...
}
Used as a slicing index, RangeFull
produces the full array as a slice.
let arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ .. ], [0, 1, 2, 3, 4]); // This is the `RangeFull`
assert_eq!(arr[ .. 3], [0, 1, 2 ]);
assert_eq!(arr[ ..=3], [0, 1, 2, 3 ]);
assert_eq!(arr[1.. ], [ 1, 2, 3, 4]);
assert_eq!(arr[1.. 3], [ 1, 2 ]);
assert_eq!(arr[1..=3], [ 1, 2, 3 ]);
Trait Implementations§
source§impl Archive for RangeFull
impl Archive for RangeFull
source§impl<C> CheckBytes<C> for RangeFullwhere
C: ?Sized,
impl<C> CheckBytes<C> for RangeFullwhere
C: ?Sized,
source§type Error = Infallible
type Error = Infallible
source§impl<D> Deserialize<RangeFull, D> for RangeFull
impl<D> Deserialize<RangeFull, D> for RangeFull
source§impl Index<RangeFull> for ArchivedCString
impl Index<RangeFull> for ArchivedCString
source§impl Index<RangeFull> for ArchivedString
impl Index<RangeFull> for ArchivedString
1.28.0 · source§impl<T> RangeBounds<T> for RangeFullwhere
T: ?Sized,
impl<T> RangeBounds<T> for RangeFullwhere
T: ?Sized,
1.15.0 (const: unstable) · source§impl<T> SliceIndex<[T]> for RangeFull
impl<T> SliceIndex<[T]> for RangeFull
source§fn get(self, slice: &[T]) -> Option<&[T]>
fn get(self, slice: &[T]) -> Option<&[T]>
slice_index_methods
)source§fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
slice_index_methods
)source§unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
slice_index_methods
)source§unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
slice_index_methods
)1.20.0 (const: unstable) · source§impl SliceIndex<str> for RangeFull
impl SliceIndex<str> for RangeFull
Implements substring slicing with syntax &self[..]
or &mut self[..]
.
Returns a slice of the whole string, i.e., returns &self
or &mut self
. Equivalent to &self[0 .. len]
or &mut self[0 .. len]
. Unlike
other indexing operations, this can never panic.
This operation is O(1).
Prior to 1.20.0, these indexing operations were still supported by
direct implementation of Index
and IndexMut
.
Equivalent to &self[0 .. len]
or &mut self[0 .. len]
.
source§fn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>
fn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>
slice_index_methods
)source§fn get_mut(
self,
slice: &mut str,
) -> Option<&mut <RangeFull as SliceIndex<str>>::Output>
fn get_mut( self, slice: &mut str, ) -> Option<&mut <RangeFull as SliceIndex<str>>::Output>
slice_index_methods
)source§unsafe fn get_unchecked(
self,
slice: *const str,
) -> *const <RangeFull as SliceIndex<str>>::Output
unsafe fn get_unchecked( self, slice: *const str, ) -> *const <RangeFull as SliceIndex<str>>::Output
slice_index_methods
)source§unsafe fn get_unchecked_mut(
self,
slice: *mut str,
) -> *mut <RangeFull as SliceIndex<str>>::Output
unsafe fn get_unchecked_mut( self, slice: *mut str, ) -> *mut <RangeFull as SliceIndex<str>>::Output
slice_index_methods
)impl Copy for RangeFull
impl Eq for RangeFull
impl StructuralPartialEq for RangeFull
Auto Trait Implementations§
impl Freeze for RangeFull
impl RefUnwindSafe for RangeFull
impl Send for RangeFull
impl Sync for RangeFull
impl Unpin for RangeFull
impl UnwindSafe for RangeFull
Blanket Implementations§
source§impl<T> ArchivePointee for T
impl<T> ArchivePointee for T
source§type ArchivedMetadata = ()
type ArchivedMetadata = ()
source§fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata,
) -> <T as Pointee>::Metadata
fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata
source§impl<T> ArchiveUnsized for Twhere
T: Archive,
impl<T> ArchiveUnsized for Twhere
T: Archive,
source§type Archived = <T as Archive>::Archived
type Archived = <T as Archive>::Archived
Archive
, it may be unsized. Read moresource§type MetadataResolver = ()
type MetadataResolver = ()
source§unsafe fn resolve_metadata(
&self,
_: usize,
_: <T as ArchiveUnsized>::MetadataResolver,
_: *mut <<T as ArchiveUnsized>::Archived as ArchivePointee>::ArchivedMetadata,
)
unsafe fn resolve_metadata( &self, _: usize, _: <T as ArchiveUnsized>::MetadataResolver, _: *mut <<T as ArchiveUnsized>::Archived as ArchivePointee>::ArchivedMetadata, )
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CallHasher for T
impl<T> CallHasher for T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<F, W, T, D> Deserialize<With<T, W>, D> for F
impl<F, W, T, D> Deserialize<With<T, W>, D> for F
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.