bors 5849a7eca9 Auto merge of #77594 - timvermeulen:chain_advance_by, r=scottmcm ...

Implement advance_by, advance_back_by for iter::Chain

Part of #77404.

This PR does two things:
- implement `Chain::advance[_back]_by` in terms of `advance[_back]_by` on `self.a` and `advance[_back]_by` on `self.b`
- change `Chain::nth[_back]` to use `advance[_back]_by` on `self.a` and `nth[_back]` on `self.b`

This ensures that `Chain::nth` can take advantage of an efficient `nth` implementation on the second iterator, in case it doesn't implement `advance_by`.

cc `@scottmcm` in case you want to review this

2020-10-06 10:17:48 +00:00

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fmt

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hash

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num

Rollup merge of #76745 - workingjubilee:move-wrapping-tests, r=matklad

2020-10-03 00:31:08 +02:00

alloc.rs

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any.rs

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array.rs

Rollup merge of #76454 - poliorcetics:ui-to-unit-test-1, r=matklad

2020-09-28 18:39:39 +02:00

ascii.rs

Move various ui const tests to library

2020-09-04 02:35:27 +02:00

atomic.rs

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bool.rs

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cell.rs

Move format-ref-cell test

2020-09-21 21:50:27 +02:00

char.rs

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clone.rs

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cmp.rs

Move const tests for Ordering to library\core

2020-09-04 00:40:11 +02:00

intrinsics.rs

move test to intergrated test in library/core

2020-09-24 14:46:57 +00:00

iter.rs

Test with non-fused iterators

2020-10-06 00:48:34 +02:00

lazy.rs

Make OnceCell<T> transparent to dropck

2020-08-18 00:34:54 +02:00

lib.rs

Rollup merge of #76909 - timvermeulen:advance_by, r=Amanieu

2020-10-01 02:13:29 +02:00

manually_drop.rs

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mem.rs

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nonzero.rs

Move various ui const tests to library

2020-09-04 02:35:27 +02:00

ops.rs

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option.rs

review: fix nits and move panic safety tests to the correct place

2020-09-25 23:10:24 +02:00

pattern.rs

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pin.rs

Make some methods of Pin<&mut T> unstable const

2020-09-18 19:23:50 +02:00

ptr.rs

enable align_to tests in Miri

2020-08-19 10:41:51 +02:00

result.rs

Auto merge of #76136 - CDirkx:const-result, r=dtolnay

2020-09-20 13:07:11 +00:00

slice.rs

review: fix nits and move panic safety tests to the correct place

2020-09-25 23:10:24 +02:00

str_lossy.rs

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str.rs

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time.rs

Make all methods of Duration const

2020-09-12 15:14:58 +02:00

tuple.rs

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