[Bug 210] [REG] Comparing identical unions with alignment holes may start failing

[via D.gnu]

http://bugzilla.gdcproject.org/show_bug.cgi?id=210

Johannes Pfau <johannespfau at gmail.com> changed:

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                 CC|                            |johannespfau at gmail.com

--- Comment #1 from Johannes Pfau <johannespfau at gmail.com> ---
> No, comparing Bar b1 == Bar b2 will not succeed in your case. Yes, this is different from dmd. Should it be considered a bug/regression? I don't mind reverting this for unions, but it might not always be correct anyway...

You're right. I didn't realize we can't actually compare unions in any other
way. For the record: As we don't know the 'active' union field we can't do
field-by-field comparisons of unions. So the only meaningful way to compare
unions is by memcmp. And then we'd have to fill the 'holes' in structs again...

I don't know if this corner-case is important enough  to really worry about
this.

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