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@pabloferz
Last active January 31, 2017 21:30
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function unique_recursive(itr)
T = Base._default_eltype(typeof(itr))
out = Vector{T}()
seen = Set{T}()
i = start(itr)
if done(itr, i)
return out
end
x, i = next(itr, i)
if !isleaftype(T)
T = typeof(x)
return unique_recursive(itr, Set{T}(), Vector{T}(), x, i)
end
push!(seen, x)
push!(out, x)
while !done(itr, i)
x, i = next(itr, i)
S = typeof(x)
if !(S === T || S <: T)
T = typejoin(S, T)
return unique_recursive(itr, convert(Set{T}, seen), convert(Vector{T}, out), x, i)
end
if !in(x, seen)
push!(seen, x)
push!(out, x)
end
end
return out
end
function unique_recursive{T}(itr, seen, out::Vector{T}, x, i)
if !in(x, seen)
push!(seen, x)
push!(out, x)
end
while !done(itr, i)
x, i = next(itr, i); S = typeof(x)
if !(S === T || S <: T)
R = typejoin(S, T)
return unique_recursive(itr, convert(Set{R}, seen), convert(Vector{R}, out), x, i)
end
if !in(x, seen)
push!(seen, x)
push!(out, x)
end
end
return out
end
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