That goes back to what Greg was saying that structs are named after the module itself. This is no different than if you want to use a module within itself: you either have to use __MODULE__ or you can type the full name verbatim.
As I said in my previous answer, Foo.Bar and Foo are completely different modules. It sounds like you are still thinking of it as Bar is a module within Foo. This is not the case, they are totally independent. Just think of . as an underscore. The . between the module name and the function, however, is an operator, though. It’s separating module and function name.
Sorry for the all the edits but I perhaps it’s clearer to say that the Foo in Foo and the Foo in Foo.Bar also have absolutely no relation.
