Packing of Struct Fields
per.nordlow at gmail.com
Sat Oct 17 12:44:44 UTC 2020
On Saturday, 17 October 2020 at 12:35:37 UTC, Per Nordlöw wrote:
> On Friday, 16 October 2020 at 21:26:12 UTC, Steven
> Schveighoffer wrote:
>> To further explain this -- the padding is added so things like
>> pointer arithmetic on an array work.
> In my code sample above one can only access the first element
> anyhow so I don't understand why this restriction is imposed
> struct S
> int i;
> bool b;
> struct T
> S s; // reinterpreting this as an array can only access
> this first element anyway
> char c; // so why can't this be aligned directly after `s`
> without any padding?
So AFAICT the key question becomes:
Can `align`s be inserted in S or/and T so that T is packed to 8
bytes but still aligned to 8 bytes? I don't see why this
shouldn't be the default behaviour...
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