On Saturday, 7 August 2021 at 14:34:49 UTC, Tejas wrote:
Umm, the ```align array``` solution is flat out wrong, please
ignore it. Most likely a bug in the compiler.
Also, why will the address of the first element of the array
```modulo``` alignment be 0? The address of the array has
absolutely nothing to do with the alignment.
You say that the ```align array``` solution has the expected
spacing, but it is default aligned, totally ignoring your 64
byte requirement.
Don't use ```x.PTR%ALIGNMENT```
Use ```(&x[1]-&[2])%ALIGNMENT```
You will get ALIGNMENT*(2 -1)(since you took difference of 2nd
and 1st elem)
For the array as a whole to be aligned, not only must the spacing
between the elements respect the alignment, but starting address
of the array itself must be a multiple of the alignment. So it is
correct to check that `x.ptr%ALIGNMENT == 0`.
The issue with `align` attributes being ignored for stack
variables is apparently a known bug, first reported in 2016:
https://issues.dlang.org/show_bug.cgi?id=16098
The issue with `align` attributes being ignored by `new` is also
a known bug, and was also first reported in 2016:
https://issues.dlang.org/show_bug.cgi?id=16508
