As far as I can tell the value associated with each entry in STD_NAMES is **not used**. So it's perfectly fair to question the need for STD_NAMES to be a dictionary *at all*, let alone a dictionary with unused dictionaries as the values. At the moment I'd be :+1: on converting STD_NAMES to a `set`.

But, I wouldn't want to make that change in the same Iris PR as the one which switches from the current auto-generated code to the new auto-generated code. So the logical route seems to be to make the change in follow-up PRs - first to the "iris-code-generators" repo and then to the "iris" repo.