In particular, this comment has a work-around: https://github.com/JuliaLang/julia/issues/269#issuecomment-68421745
On Saturday, August 22, 2015, Stefan Karpinski <ste...@karpinski.org> wrote: > https://github.com/JuliaLang/julia/issues/269 > > On Sat, Aug 22, 2015 at 1:33 AM, Paul Thompson <pm...@case.edu > <javascript:_e(%7B%7D,'cvml','pm...@case.edu');>> wrote: > >> Hi: >> >> I want to define two types, and each will have a field that is the other >> type. For instance: >> >> type Foo >> bar::Bar >> otherfield1 >> otherfield2 >> end >> >> type Bar >> foo::Foo >> otherfield1 >> otherfield2 >> end >> >> >> The above results in an error when defining Foo because Bar is not >> defined. I could make the types parametric, and do something like Foo{T}, >> but I really don't need to, because that field will always be a Bar in my >> application. This is kind of an odd self-referential like problem, but at >> the definition step rather than initialization. >> >> Is there a way for Julia to know that the definition of the yet undefined >> type is on the way? >> >> Thanks, >> >> Paul >> > >
