cast ref pointer

[Luís Marques]

On Thursday, 18 January 2018 at 16:14:18 UTC, ag0aep6g wrote:
> On 01/18/2018 04:25 PM, Luís Marques wrote:
> You need a reinterpret-style cast here to get an lvalue:
>
>     foo(* cast(int**) &ptr);

Right, that's what I wanted. Ugh, for some reason I was totally 
confused about this :-)

>>          writeln(*cast(int*) *ptr);
>
> You're dereferencing twice here. Do it only once, after casting:

That was just a typo.

> That way, `ptr` itself won't be updated by `foo`, of course. 
> But `ptr` isn't a `ref` parameter, so this only affects the 
> insides of `bar` anyway.

Yeah, it was a bad example.