On Saturday, 16 July 2022 at 12:40:06 UTC, Tejas wrote: > It doens't compile when I run it on run.dlang.io, erroring out > with: > ``` > onlineapp.d(11): Error: cannot take address of parameter `x` in > `@safe` function `isNull` > ``` Oh sorry, it needs `-preview=dip1000`