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00c8da14
编写于
9月 03, 2021
作者:
M
Mara Bos
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Update primitive docs for rust 2021.
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fbdff7fa
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with
11 addition
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7 deletion
+11
-7
library/std/src/primitive_docs.rs
library/std/src/primitive_docs.rs
+11
-7
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library/std/src/primitive_docs.rs
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00c8da14
...
...
@@ -581,6 +581,8 @@ mod prim_pointer {}
/// might be made consistent to the behavior of later editions.
///
/// ```rust,edition2018
/// // Rust 2015 and 2018:
///
/// # #![allow(array_into_iter)] // override our `deny(warnings)`
/// let array: [i32; 3] = [0; 3];
///
...
...
@@ -604,11 +606,13 @@ mod prim_pointer {}
/// }
/// ```
///
/// Starting in the 2021 edition, `array.into_iter()`
will use
`IntoIterator` normally to iterate
/// Starting in the 2021 edition, `array.into_iter()`
uses
`IntoIterator` normally to iterate
/// by value, and `iter()` should be used to iterate by reference like previous editions.
///
/// ```rust,edition2021,ignore
/// # // FIXME: ignored because 2021 testing is still unstable
#[cfg_attr(bootstrap,
doc
=
"```rust,edition2021,ignore"
)]
#[cfg_attr(not(bootstrap),
doc
=
"```rust,edition2021"
)]
/// // Rust 2021:
///
/// let array: [i32; 3] = [0; 3];
///
/// // This iterates by reference:
...
...
@@ -631,12 +635,12 @@ mod prim_pointer {}
/// avoid the `into_iter` syntax on those editions. If an edition update is not
/// viable/desired, there are multiple alternatives:
/// * use `iter`, equivalent to the old behavior, creating references
/// * use [`
array::IntoIter`], equivalent to the post-2021 behavior (Rust 1.51
+)
/// * use [`
IntoIterator::into_iter`], equivalent to the post-2021 behavior (Rust 1.53
+)
/// * replace `for ... in array.into_iter() {` with `for ... in array {`,
/// equivalent to the post-2021 behavior (Rust 1.53+)
///
/// ```rust,edition2018
///
use std::array::IntoIter;
///
// Rust 2015 and 2018:
///
/// let array: [i32; 3] = [0; 3];
///
...
...
@@ -647,7 +651,7 @@ mod prim_pointer {}
/// }
///
/// // This iterates by value:
/// for item in IntoIter
::new
(array) {
/// for item in IntoIter
ator::into_iter
(array) {
/// let x: i32 = item;
/// println!("{}", x);
/// }
...
...
@@ -660,7 +664,7 @@ mod prim_pointer {}
///
/// // IntoIter can also start a chain.
/// // This iterates by value:
/// for item in IntoIter
::new
(array).enumerate() {
/// for item in IntoIter
ator::into_iter
(array).enumerate() {
/// let (i, x): (usize, i32) = item;
/// println!("array[{}] = {}", i, x);
/// }
...
...
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