[julia-users] Issue with return values from subtypes

[Scott Jones]

I ran across something strange today, with some of the test code, that used 
something like:
for x in [subtypes(Real) ; subtypes(Complex)]
...
end

The issue is that subtypes(Real) returns:

*julia> **subtypes(Real)*

*4-element Array{Any,1}:*

* AbstractFloat       *

* Integer             *

* Irrational{sym}     *

* Rational{T<:Integer}*

If instead of having subtypes(Real), I try to put the types in directly, it 
won't accept either Irrational{sym} or Rational{T<:Integer}.
Is there a correct way to represent those?  Should Irrational{sym} be 
something like Irrational{::Symbol}?
Is this a bug in subtypes?

Thanks, Scott