pub struct RangeFull;
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);
RunIt does not have an IntoIterator
implementation, so you can’t use it in
a for
loop directly. This won’t compile:
for i in .. {
// ...
}
RunUsed 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 ]);
RunTrait Implementations
1.28.0 · sourceimpl<T> RangeBounds<T> for RangeFull where
T: ?Sized,
impl<T> RangeBounds<T> for RangeFull where
T: ?Sized,
1.15.0 (const: unstable) · sourceimpl<T> SliceIndex<[T]> for RangeFull
impl<T> SliceIndex<[T]> for RangeFull
const: unstable · sourcefn get(self, slice: &[T]) -> Option<&[T]>
fn get(self, slice: &[T]) -> Option<&[T]>
slice_index_methods
)Returns a shared reference to the output at this location, if in bounds. Read more
const: unstable · sourcefn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
slice_index_methods
)Returns a mutable reference to the output at this location, if in bounds. Read more
const: unstable · sourceunsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
slice_index_methods
)Returns a shared reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
const: unstable · sourceunsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
slice_index_methods
)Returns a mutable reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
const: unstable · sourcefn index(self, slice: &[T]) -> &[T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
fn index(self, slice: &[T]) -> &[T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
slice_index_methods
)Returns a shared reference to the output at this location, panicking if out of bounds. Read more
const: unstable · sourcefn index_mut(self, slice: &mut [T]) -> &mut [T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
fn index_mut(self, slice: &mut [T]) -> &mut [T]ⓘNotable traits for &[u8]impl Read for &[u8]impl Write for &mut [u8]
slice_index_methods
)Returns a mutable reference to the output at this location, panicking if out of bounds. Read more
1.20.0 (const: unstable) · sourceimpl 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]
.
const: unstable · sourcefn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>
fn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>
slice_index_methods
)Returns a shared reference to the output at this location, if in bounds. Read more
const: unstable · sourcefn 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
)Returns a mutable reference to the output at this location, if in bounds. Read more
const: unstable · sourceunsafe 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
)Returns a shared reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
const: unstable · sourceunsafe 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
)Returns a mutable reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
impl Copy for RangeFull
impl Eq for RangeFull
impl StructuralEq for RangeFull
impl StructuralPartialEq for RangeFull
Auto Trait Implementations
impl RefUnwindSafe for RangeFull
impl Send for RangeFull
impl Sync for RangeFull
impl Unpin for RangeFull
impl UnwindSafe for RangeFull
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more