On Saturday, 3 September 2022 at 14:37:16 UTC, Steven
Schveighoffer wrote:
On 9/2/22 3:15 PM, cc wrote:
Tried casting away shared as a workaround but I assume that
will cause some kind of TLS catastrophe.
I think it will be fine, but you may have an issue. You are
returning a non-shared `VAL`, but your class is `shared`, which
means `table`, and all the `VAL` and `KEY` inside must also be
`shared`.
If you cast away `shared` you have to put it back upon return.
TLS should not be involved here at all, so there is no problem
there.
-Steve
Alright, so this is safe then?
```d
alias VAL[KEY] T;
auto require(KEY key) {
auto unsharedT = cast(T) table;
auto r = unsharedT.require(key);
table = cast(shared) unsharedT;
return cast(shared) r;
}
```
Was a bit surprised to see mutating `unsharedT` left `table`
unchanged and needed reassigning.
