I was thinking the same thing. That and I'm not understanding from the page how this is used in the first place. Is the `arguments` implicit variable being pas

I was thinking the same thing. That and I'm not understanding from the page how this is used in the first place. Is the `arguments` implicit variable being passed in some place? (EDIT: yes, via `Function.caller`.) Are the argument values accessed through the result of calling `Args`? For a non-macro implementation of this, it might be interesting to use function decorator syntax instead, to put the argument processing outside the function body entirely. Basically, the argument processor decorator function would take an options array and a target function, which has all possible parameters, explicitly named. The decorator would spit out a new function that invisibly does all of the wrangling of `arguments` and then finally calls the target function. An advantage is that I think this would be the most minimal pure JS solution from a syntax perspective, and it would keep the actual function body uncluttered. A disadvantage is that it could only really be used with function expressions (not declarations).