On Sep 17, 2023, at 12:20, Tom Lane <t...@sss.pgh.pa.us> wrote: > After thinking about it for awhile, I think we need some more > discursive explanation of what's allowed, perhaps along the lines > of the attached. (I still can't shake the feeling that this is > duplicative; but I can't find anything comparable until you get > into the weeds in Section V.) > > I put the new text at the end of section 11.1, but perhaps it > belongs a little further up in that section; it seems more > important than some of the preceding paras.
I think this is useful, but also that it’s worth calling out explicitly that functions do not count as indexable operators. True by definition, of course, but I at least had assumed that since an operator is, in a sense, syntax sugar for a function call, they are in some sense the same thing. A header might be useful, something like “What Counts as an indexable expression”. Best, David
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