Fix type instability for exponent iterator with no variable #343
+21
−8
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The current approach causes small type instability which amplifies into bigger one down the line in JuliaAlgebra/MultivariateBases.jl#57 just for the sake of having
Base.IteratorSizetype-stable.Since
Base.IteratorSizeisn't so critical, it's probably better to have everything type-stable expectIteratorSize.This is the approach taken in this PR.