1.0.0[−][src]Module alloc::slice
A dynamically-sized view into a contiguous sequence, [T]
.
See also the slice primitive type.
Slices are a view into a block of memory represented as a pointer and a length.
// slicing a Vec let vec = vec![1, 2, 3]; let int_slice = &vec[..]; // coercing an array to a slice let str_slice: &[&str] = &["one", "two", "three"];
Slices are either mutable or shared. The shared slice type is &[T]
,
while the mutable slice type is &mut [T]
, where T
represents the element
type. For example, you can mutate the block of memory that a mutable slice
points to:
let x = &mut [1, 2, 3]; x[1] = 7; assert_eq!(x, &[1, 7, 3]);
Here are some of the things this module contains:
Structs
There are several structs that are useful for slices, such as Iter
, which
represents iteration over a slice.
Trait Implementations
There are several implementations of common traits for slices. Some examples include:
Clone
Eq
,Ord
- for slices whose element type areEq
orOrd
.Hash
- for slices whose element type isHash
.
Iteration
The slices implement IntoIterator
. The iterator yields references to the
slice elements.
let numbers = &[0, 1, 2]; for n in numbers { println!("{} is a number!", n); }
The mutable slice yields mutable references to the elements:
let mut scores = [7, 8, 9]; for score in &mut scores[..] { *score += 1; }
This iterator yields mutable references to the slice's elements, so while
the element type of the slice is i32
, the element type of the iterator is
&mut i32
.
Structs
Chunks | An iterator over a slice in (non-overlapping) chunks ( |
ChunksExact | An iterator over a slice in (non-overlapping) chunks ( |
ChunksExactMut | An iterator over a slice in (non-overlapping) mutable chunks ( |
ChunksMut | An iterator over a slice in (non-overlapping) mutable chunks ( |
Iter | Immutable slice iterator |
IterMut | Mutable slice iterator. |
RChunks | An iterator over a slice in (non-overlapping) chunks ( |
RChunksExact | An iterator over a slice in (non-overlapping) chunks ( |
RChunksExactMut | An iterator over a slice in (non-overlapping) mutable chunks ( |
RChunksMut | An iterator over a slice in (non-overlapping) mutable chunks ( |
RSplit | An iterator over subslices separated by elements that match a predicate function, starting from the end of the slice. |
RSplitMut | An iterator over the subslices of the vector which are separated
by elements that match |
RSplitN | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits, starting from the end of the slice. |
RSplitNMut | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits, starting from the end of the slice. |
Split | An iterator over subslices separated by elements that match a predicate function. |
SplitMut | An iterator over the subslices of the vector which are separated
by elements that match |
SplitN | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits. |
SplitNMut | An iterator over subslices separated by elements that match a predicate function, limited to a given number of splits. |
Windows | An iterator over overlapping subslices of length |
Traits
SliceIndex | A helper trait used for indexing operations. |
SliceConcatExt | Experimental An extension trait for concatenating slices |
Functions
from_mut | Converts a reference to T into a slice of length 1 (without copying). |
from_raw_parts⚠ | Forms a slice from a pointer and a length. |
from_raw_parts_mut⚠ | Performs the same functionality as |
from_ref | Converts a reference to T into a slice of length 1 (without copying). |