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Adjust docs and tests for new IntoIterator impl for arrays

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This commit is contained in:
Lukas Kalbertodt 2020-07-28 19:03:56 +02:00 • committed by Josh Stone
parent 32aaea9c8f
commit 35b1590223
5 changed files with 8 additions and 169 deletions
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23
library/std/src/primitive_docs.rs
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@ -498,7 +498,7 @@ mod prim_pointer {}
/// - [`Copy`]
/// - [`Clone`]
/// - [`Debug`]
/// - [`IntoIterator`] (implemented for `&[T; N]` and `&mut [T; N]`)
/// - [`IntoIterator`] (implemented for `[T; N]`, `&[T; N]` and `&mut [T; N]`)
/// - [`PartialEq`], [`PartialOrd`], [`Eq`], [`Ord`]
/// - [`Hash`]
/// - [`AsRef`], [`AsMut`]
@ -526,31 +526,16 @@ mod prim_pointer {}
/// assert_eq!([1, 2], &array[1..]);
///
/// // This loop prints: 0 1 2
/// for x in &array {
/// for x in array {
/// print!("{} ", x);
/// }
/// ```
///
/// An array itself is not iterable:
/// You can also iterate over reference to the array's elements:
///
/// ```compile_fail,E0277
/// ```
/// let array: [i32; 3] = [0; 3];
///
/// for x in array { }
/// // error: the trait bound `[i32; 3]: std::iter::Iterator` is not satisfied
/// ```
///
/// The solution is to coerce the array to a slice by calling a slice method:
///
/// ```
/// # let array: [i32; 3] = [0; 3];
/// for x in array.iter() { }
/// ```
///
/// You can also use the array reference's [`IntoIterator`] implementation:
///
/// ```
/// # let array: [i32; 3] = [0; 3];
/// for x in &array { }
/// ```
///