31 Commits

Author SHA1 Message Date
Jethro Beekman
203cf2d366 Add rsplit_array variants to slices and arrays 2021-12-10 21:34:19 +01:00
Ralf Jung
b11d88006c disable tests in Miri that take too long 2021-12-01 22:48:59 -05:00
Matthias Krüger
9f1f42897d
Rollup merge of #88502 - ibraheemdev:slice-take, r=dtolnay
Add slice take methods

Revival of #62282

This PR adds the following slice methods:

- `take`
- `take_mut`
- `take_first`
- `take_first_mut`
- `take_last`
- `take_last_mut`

r? `@LukasKalbertodt`
2021-12-01 20:57:42 +01:00
The8472
3f9b26dc64 Fix Iterator::advance_by contract inconsistency
The `advance_by(n)` docs state that in the error case `Err(k)` that k is always less than n.
It also states that `advance_by(0)` may return `Err(0)` to indicate an exhausted iterator.
These statements are inconsistent.
Since only one implementation (Skip) actually made use of that I changed it to return Ok(()) in that case too.

While adding some tests I also found a bug in `Take::advance_back_by`.
2021-11-19 13:00:23 +01:00
Ibraheem Ahmed
8db85a3c78 add slice take methods 2021-11-12 23:08:27 -05:00
Matthias Krüger
c16ee19dd4
Rollup merge of #90162 - WaffleLapkin:const_array_slice_from_ref_mut, r=oli-obk
Mark `{array, slice}::{from_ref, from_mut}` as const fn

This PR marks the following APIs as `const`:
```rust
// core::array
pub const fn from_ref<T>(s: &T) -> &[T; 1];
pub const fn from_mut<T>(s: &mut T) -> &mut [T; 1];

// core::slice
pub const fn from_ref<T>(s: &T) -> &[T];
pub const fn from_mut<T>(s: &mut T) -> &mut [T];
```

Note that `from_ref` methods require `const_raw_ptr_deref` feature (which seems totally fine, since it's being stabilized, see #89551), `from_mut` methods require `const_mut_refs` (which seems fine too since this PR marks `from_mut` functions as const unstable).

r? ````@oli-obk````
2021-10-24 15:48:44 +02:00
Maybe Waffle
5f390cfb72 Add tests for const_slice_from_ref and const_array_from_ref 2021-10-23 22:51:22 +03:00
Jethro Beekman
4a439769ec Implement split_array and split_array_mut 2021-10-22 09:58:24 +02:00
Ibraheem Ahmed
c517a0de3e add slice::swap tests 2021-10-11 16:16:20 -04:00
Katherine Philip
5390ea4644 Move to the top of file 2021-08-31 08:28:51 -07:00
Katherine Philip
8cecac2602 Add test case for using slice::fill with MaybeUninit 2021-08-30 13:20:11 -07:00
lcnr
24aa45c95e add windows count test 2021-08-09 11:08:39 +02:00
Tim Vermeulen
5e90909f38 Add tests 2021-07-22 22:05:41 +02:00
AnthonyMikh
7efba4f982 Implement indexing slices with pairs of ops::Bound<usize> 2021-04-13 09:57:24 -04:00
Folyd
3eb5bee242 Fix binary_search_by() overflow issue in ZST case 2021-02-27 22:11:44 +08:00
Folyd
7d078cfb94 Simplify binary search logic to full branch code to let CPU guessing branch more precisely 2021-01-30 14:11:47 +08:00
Folyd
18e44a1be4 Improve slice.binary_search_by()'s best-case performance to O(1) 2021-01-30 14:11:47 +08:00
Josh Stone
9202fbdbdb Check for exhaustion in SliceIndex for RangeInclusive 2020-10-20 17:18:08 -07:00
James Gill
01ac5a97c9 Stabilize slice_select_nth_unstable
This stabilizes the functionality in slice_partition_at_index,
but under the names `select_nth_unstable*`.  The functions
`partition_at_index*` are left as deprecated, to be removed in
a later release.

Closes #55300
2020-10-12 00:07:41 -04:00
Alexis Bourget
a61b9638bb review: fix nits and move panic safety tests to the correct place 2020-09-25 23:10:24 +02:00
Alexis Bourget
275eed7eb1 Move vec-slice-drop test 2020-09-21 21:50:27 +02:00
kadmin
f240abc1dc Add array window fn
Updated issue to #75027

Update to rm oob access

And hopefully fix docs as well

Fixed naming conflict in test

Fix test which used 1-indexing

Nth starts from 0, woops

Fix a bunch of off by 1 errors

See https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=757b311987e3fae1ca47122969acda5a

Add even more off by 1 errors

And also write `next` and `next_back` in terms of `nth` and `nth_back`.

Run fmt

Fix forgetting to change fn name in test

add nth_back test & document unsafe

Remove as_ref().unwrap()
Documented occurrences of unsafe, noting what invariants are maintained
2020-09-16 14:52:20 +00:00
Josh Stone
b9fd6734e8 Add tests for array_chunks_mut 2020-09-04 19:51:29 -07:00
bors
ef55a0a92f Auto merge of #75207 - dylni:add-slice-check-range, r=KodrAus
Add `slice::check_range`

This method is useful for [`RangeBounds`] parameters. It's even been [rewritten](22ee68dc58/src/librustc_data_structures/sorted_map.rs (L214)) [many](22ee68dc58/library/alloc/src/vec.rs (L1299)) [times](22ee68dc58/library/core/src/slice/mod.rs (L2441)) in the standard library, sometimes assuming that the bounds won't be [`usize::MAX`].

For example, [`Vec::drain`] creates an empty iterator when [`usize::MAX`] is used as an inclusive end bound:

```rust
assert!(vec![1].drain(..=usize::max_value()).eq(iter::empty()));
```

If this PR is merged, I'll create another to use it for those methods.

[`RangeBounds`]: https://doc.rust-lang.org/std/ops/trait.RangeBounds.html
[`usize::MAX`]: https://doc.rust-lang.org/std/primitive.usize.html#associatedconstant.MAX
[`Vec::drain`]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.drain
2020-09-04 12:21:43 +00:00
Ralf Jung
6a06bfc252 enable align_to tests in Miri 2020-08-19 10:41:51 +02:00
dylni
d04e6b8de5 Replace ad hoc implementations with slice::check_range 2020-08-16 21:47:12 -04:00
Yuki Okushi
7d18040b0c
Rollup merge of #74974 - RalfJung:miri-tests, r=Mark-Simulacrum
Make tests faster in Miri

Reduce some test iteration counts in Miri.
2020-08-03 01:05:20 +09:00
Ralf Jung
ff0c3a9209 expand comments 2020-07-31 14:03:42 +02:00
Ralf Jung
7468f632ff also reduce some libcore test iteration counts 2020-07-31 11:56:08 +02:00
Bastian Kauschke
d27007fd6d add tests for array_chunks 2020-07-30 10:50:34 +02:00
mark
2c31b45ae8 mv std libs to library/ 2020-07-27 19:51:13 -05:00