Packing of Struct Fields

[ag0aep6g]

On 17.10.20 14:35, Per Nordlöw wrote:
> 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?
> }
> 

c does come directly after s. The padding between b and c is part of s. 
If you don't want that padding, you can use `align(1)` to define S 
without padding. But then 75% of the ints in an S[] will be misaligned.