[Bug libstdc++/19510] [4.0 regression] Warning using list iterators

[gdr at integrable-solutions dot net]

------- Additional Comments From gdr at integrable-solutions dot net  2005-01-18 21:46 -------
Subject: Re:  [4.0 regression] Warning using list iterators

"pcarlini at suse dot de" <gcc-bugzilla@gcc.gnu.org> writes:

| > I think your patch is OK and should be applied.
| 
| First blush, I agree. Is it 100% safe wrt the ABI? (I remember tricky details
| only about copy constructor and assignment, actually)

Careless addition of constructors or destructors can indeed change an ABI.

However in the specific case at hand,  the addition is that of a
non-copy default constructor whose only potential impact is that
of changing a POD to non-POD.  However, both _List_iterator and
_List_const_iterator are already non-POD as they have a constructor to
convert from a _List_node_base*.

So the patch is ABI-neutral.

-- Gaby


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19510