[Issue 4421] Union propagates copy constructors and destructors over all members

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4421


Maxim Fomin <maxim at maxim-fomin.ru> changed:

           What    |Removed                     |Added
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                 CC|                            |maxim at maxim-fomin.ru
           Severity|normal                      |major


--- Comment #4 from Maxim Fomin <maxim at maxim-fomin.ru> 2013-05-18 13:39:25 PDT ---
In the first order unions and structs both belong to aggregate type category.
Normally they should share few common characteristics, but currently in D they
are very close to each other so that when you use a union, you use a struct
except ctor ability and member storage. Following futures are supported by
unions:

* postblits
* dtors
* member functions
* operator overloading
* shared static constructors 
* invariants
* and other features...

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