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Make arrays and ranges hash and compare equal #16401

Merged
merged 11 commits into from
Dec 21, 2017
Merged

Make arrays and ranges hash and compare equal #16401

merged 11 commits into from
Dec 21, 2017

Commits on Dec 21, 2017

  1. Make vectors and ranges hash and compare equal 

    When hashing AbstractVectors, first check whether their first elements are equal
to a range, and hash them as a such if that's the case.
This allows for O(1) hashing of (some) ranges consistent with AbstractArrays,
which means they can now compare equal. Types which have a regular range
step have to use the new TypeRangeStep trait to enable O(1) hashing rather
than the O(N) AbstractArray fallback.

Apply the new trait to date ranges which have a regular step. Add tests
for the new behaviors.
    @nalimilan
    nalimilan committed Dec 21, 2017
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  2. Remove unneeded calls to collect() when comparing ranges with arrays 

    Ranges can now be tested for equality directly against arrays.
    @nalimilan
    nalimilan committed Dec 21, 2017
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  3. Use another strategy

    @nalimilan
    nalimilan committed Dec 21, 2017
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  4. Rebase fixes

    @nalimilan
    nalimilan committed Dec 21, 2017
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  5. New approach based on hash_sub()

    @nalimilan
    nalimilan committed Dec 21, 2017
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  6. tmp

    @nalimilan
    nalimilan committed Dec 21, 2017
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  7. tmp, fix tests using sign and cmp to detect overflow

    @nalimilan
    nalimilan committed Dec 21, 2017
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  8. Improve code logic

    @nalimilan
    nalimilan committed Dec 21, 2017
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  9. Use widen() rather than hash_sub()

    @nalimilan
    nalimilan committed Dec 21, 2017
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  10. Comment out a test which triggers an inference bug in numbers.jl (#25221 

    )
    @nalimilan
    nalimilan committed Dec 21, 2017
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  11. Use a single loop

    @nalimilan
    nalimilan committed Dec 21, 2017
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