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Rollup merge of #28759 - steveklabnik:gh28359, r=nikomatsakis

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Fixes #28359

I'm not doing more here because it's unclear that `as_slice()` is even going to stick around, see https://github.com/rust-lang/rust/issues/27729
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Steve Klabnik 2015-09-30 14:51:54 -04:00
commit d1137d634b
1 changed files with 8 additions and 3 deletions
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11
src/doc/trpl/primitive-types.md
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@ -162,13 +162,18 @@ A ‘slice’ is a reference to (or “view” into) another data structure. The
useful for allowing safe, efficient access to a portion of an array without
copying. For example, you might want to reference just one line of a file read
into memory. By nature, a slice is not created directly, but from an existing
variable. Slices have a length, can be mutable or not, and in many ways behave
like arrays:
variable binding. Slices have a defined length, can be mutable or immutable.
## Slicing syntax
You can use a combo of `&` and `[]` to create a slice from various things. The
`&` indicates that slices are similar to references, and the `[]`s, with a
range, let you define the length of the slice:
```rust
let a = [0, 1, 2, 3, 4];
let middle = &a[1..4]; // A slice of a: just the elements 1, 2, and 3
let complete = &a[..]; // A slice containing all of the elements in a
let middle = &a[1..4]; // A slice of a: just the elements 1, 2, and 3
```
Slices have type `&[T]`. We’ll talk about that `T` when we cover