On Thu, Oct 9, 2014 at 11:19 AM, John Myles White <[email protected]> wrote:
> People have started using isdefined in non-Base code, which I think is the > first step towards #undef becoming a de facto first-class citizen. This is actually not such a big deal since you still can't return it from a function or assign it anywhere – that's the real problem since it poisons all type analysis.
