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Inference for splatting numbers (and more) #27434

Merged
merged 4 commits into from
Jun 26, 2018
Merged

Inference for splatting numbers (and more) #27434

merged 4 commits into from
Jun 26, 2018

Commits on Jun 26, 2018

  1. Improve abstract_iteration 

    Exploit the fact that the (minimum) number of elements obtained from
iteration can be derived from the types in certain cases and hence, a
more exact type can be inferred for splatting them.
    @martinholters
    martinholters committed Jun 26, 2018
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  2. Let splatting of infinite iterators be inferred as Bottom

    @martinholters
    martinholters committed Jun 26, 2018
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  3. Use Base.iterate instead of topmod().iterate in abstract_iteration

    @martinholters
    martinholters committed Jun 26, 2018
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  4. Make iterate(::Number) more digestible by abstract_iteration 

    Letting the presence of a second argument alone decide whether iteration
is done lets `abstract_iteration` determine that splatting a `Number`
yields exactly one `Number`.
    @martinholters
    martinholters committed Jun 26, 2018
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