On Tuesday, 17 April 2018 at 20:49:30 UTC, Steven Schveighoffer
wrote:
Not as straightforward, but it can be done:
bool inserted = false;
auto p = aa.getOrAdd("key", {inserted = true; return new
Person; });
Yes, I like that approach. I don't want to bloat the feature at
this stage, although there is nothing stopping adding an overload
later. I agree returning ref makes sense since we never return
null. Consequently, I am leaning toward thinking it should be
called getOrCreate now though.
Rust calls its version of this function `or_insert_with` (blegh)
https://doc.rust-lang.org/std/collections/hash_map/enum.Entry.html#method.or_insert_with
