On Mon, Aug 8, 2016 at 3:57 AM, Andrei Zh <faithlessfri...@gmail.com> wrote:
> While parsing Julia expressions, I noticed that sometimes calls to > This shouldn't happen. > global functions resolve to `GloablRef` and sometimes to > and GlobalRef should only happen during lowering. > getfield(Module, func). Could somebody please clarify: > > 1. Why do we need both? > GlobalRef is essentially an optimization. It's more restricted and easier to interpret/codegen and is emitted by lowering/type inference when it is legal to do so. > 2. Is it safe to replace one by the other (assuming only modules and > functions are involved)? > Not always. There are certainly cases where a GlobalRef currently can't be used (method definition for example) I'm not sure if there's cases the other way around.
