Ali Çehreli:
> I remember being a part of a discussion where D'is unions were told to be exactly the same as C's. That means, results of using a union is only specified when it's used through one its members. Writing to one member and reading from another is unspecified. It is clear that endianness and padding should complicate matters.

I have just written a post about this topic: http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=117675

Bye and thank you,
bearophile