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Add by-value iterator for arrays #62959

Merged
merged 3 commits into from Oct 25, 2019
Merged

Add by-value iterator for arrays #62959

merged 3 commits into from Oct 25, 2019

Commits on Oct 24, 2019

  1. Add array::IntoIter as a consuming/by-value array iterator 

    The iterator is implemented using const generics. It implements the
traits `Iterator`, `DoubleEndedIterator`, `ExactSizeIterator`,
`FusedIterator` and `TrustedLen`. It also contains a public method
`new` to create it from an array.

`IntoIterator` was not implemented for arrays yet, as there are still
some open questions regarding backwards compatibility. This commit
only adds the iterator impl and does not yet offer a convenient way
to obtain that iterator.
    @LukasKalbertodt
    LukasKalbertodt committed Oct 24, 2019
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  2. Add unit tests for array::IntoIter 

    Many tests are based on tests by Josh Stone <cuviper@gmail.com>
    @LukasKalbertodt
    LukasKalbertodt committed Oct 24, 2019
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  3. Add UI tests for array::IntoIter impls 

    This it to make sure traits are implemented for arrays with length 32
and below, while they are not implemented for >= 33.
    @LukasKalbertodt
    LukasKalbertodt committed Oct 24, 2019
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