[Issue 3433] [tdpl] Comparing structs for equality is not member-by-member

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3433


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
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                 CC|                            |clugdbug at yahoo.com.au


--- Comment #5 from Don <clugdbug at yahoo.com.au> 2009-11-13 23:52:28 PST ---
This has some tricky points. The first is that it's recursive. As well as
structs, it also applies to fixed-length arrays: if either contains a struct
with an opEquals, the entire struct must be compared member-by-member; and this
check must be performed recursively.
Secondly, what happens with unions?

struct Rectangle {
   union {
      Point leftBottom;
      int problematic;
   }
}
I think this should probably be an error.
The third difficult part relates to protection. Any of the struct members may
be private and defined in a different module.

If a field in the struct is a class, it probably applies to it as well.

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