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eltype(Tuple{...}) less specific than 0.5 #20143

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TotalVerb opened this issue Jan 20, 2017 · 1 comment
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eltype(Tuple{...}) less specific than 0.5 #20143

TotalVerb opened this issue Jan 20, 2017 · 1 comment
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types and dispatch Types, subtyping and method dispatch

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@TotalVerb
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One consequence of new subtyping is that the eltype for certain non-concrete Tuple types no longer returns the most specific possible result; i.e. in 0.5

julia> eltype(Tuple{Integer})
Integer

whereas in 0.6

julia> eltype(Tuple{Integer})
Any

Related: #20140
@ararslan ararslan added the types and dispatch Types, subtyping and method dispatch label Jan 20, 2017
@vtjnash
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vtjnash commented Jan 20, 2017

This appears to be a direct consequence of #19998 (comment)

Maybe that condition needs more consideration, or it seems we might need to find a different way to express this.

@TotalVerb TotalVerb mentioned this issue Mar 20, 2017
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@vtjnash @ararslan @TotalVerb