8000 Rollup of 6 pull requests by Dylan-DPC-zz · Pull Request #70800 · rust-lang/rust · GitHub
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Rollup of 6 pull requests #70800

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Merged
merged 12 commits into from
Apr 5, 2020
Merged

Rollup of 6 pull requests #70800

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6b6cb7b
Do not disable field reordering on enums with big discriminant
ogoffart Apr 3, 2020
2b718e8
use ManuallyDrop instead of forget inside collections
tspiteri Apr 4, 2020
cd79400
rustc_target: Rely on default value of `no_default_libraries` more
petrochenkov Mar 31, 2020
106b30e
macro_rules: `NtLifetime` cannot start with an identifier
petrochenkov Apr 4, 2020
636076a
comment refers to removed type
tshepang Apr 4, 2020
edabceb
Add slice::fill
yoshuawuyts Apr 3, 2020
9baba34
Rollup merge of #70635 - petrochenkov:nodefault, r=nagisa
Dylan-DPC Apr 5, 2020
630414d
Rollup merge of #70748 - ogoffart:enum-layout-optim2, r=eddyb
Dylan-DPC Apr 5, 2020
6ea2701
Rollup merge of #70752 - yoshuawuyts:slice_fill, r=dtolnay
Dylan-DPC Apr 5, 2020
590cb8b
Rollup merge of #70766 - tspiteri:forget-to-ManuallyDrop, r=Mark-Simu…
Dylan-DPC Apr 5, 2020
d0dda18
Rollup merge of #70768 - petrochenkov:macambig, r=Centril,mark-i-m
Dylan-DPC Apr 5, 2020
5c42faf
Rollup merge of #70783 - tshepang:deleted-types, r=Xanewok
Dylan-DPC Apr 5, 2020
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Add slice::fill
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@yoshuawuyts
yoshuawuyts committed Apr 4, 2020
commit edabceb4a3f0149323c381d5c75fe6957385addf
24 changes: 24 additions & 0 deletions src/libcore/slice/mod.rs
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< 3FC9 td class="blob-num blob-num-expandable" colspan="2"> Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
// * The `raw` and `bytes` submodules.
// * Boilerplate trait implementations.

use crate::borrow::Borrow;
use crate::cmp;
use crate::cmp::Ordering::{self, Equal, Greater, Less};
use crate::fmt;
Expand Down Expand Up @@ -2145,6 +2146,29 @@ impl<T> [T] {
}
}

/// Fills `self` with elements by cloning `value`.
///
/// # Examples
///
/// ```
/// #![feature(slice_fill)]
///
/// let mut buf = vec![0; 10];
/// buf.fill(1);
/// assert_eq!(buf, vec![1; 10]);
/// ```
#[unstable(feature = "slice_fill", issue = "70758")]
pub fn fill<V>(&mut self, value: V)
where
V: Borrow<T>,
T: Clone,
{
let value = value.borrow();
for el in self {
el.clone_from(value)
}
}

/// Copies the elements from `src` into `self`.
///
/// The length of `src` must be the same as `self`.
0