add iterator traits for #8

Author: stevengj

src/Sobol.jl

@@ -104,6 +104,11 @@ end
 start(s::SobolSeq) = s
 next(s::SobolSeq, s_::SobolSeq) = (next(s), s_)
 done(s::SobolSeq, s_::SobolSeq) = false
+Base.eltype{N}(::Type{SobolSeq{N}}) = Vector{Float64}
+if VERSION >= v"0.5.0-dev+3305" # Julia #15123
+    Base.iteratorsize{N}(::Type{SobolSeq{N}}) = Base.IsInfinite()
+    Base.iteratoreltype{N}(::Type{SobolSeq{N}}) = Base.HasEltype()
+end
 
 # Convenience wrapper for scaled Sobol sequences
 

test/runtests.jl

@@ -46,3 +46,6 @@ for i = 1:length(N)
         @test_approx_eq_eps t JoeKuo[i,j] 1e-4
     end
 end
+
+# issue #8
+@test [x[1] for x in take(Sobol.SobolSeq(1),5)] == [0.5,0.75,0.25,0.375,0.875]