Re: [Boost-users] [Serialization] Strange giant warning

On Wed, Mar 10, 2010 at 9:31 PM, Robert Ramey wrote:

OvermindDL1 wrote:

...

On Tue, Mar 9, 2010 at 6:38 AM, Avi Bahra wrote:

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This is caused by a bug in the boost serialisation, well at least in 1.39 Where is assumes that shared ptr must be polymorphic I have already reported a similar problem. i.e

Oh I *SO* hate that bug, so very much.

what makes you think it's a bug in serialization library?

If I recall correctly, the motivation for the warning is the following.

class base { // no virtual functions here !!    ... };

class derived : public base {    ... };

BOOST_CLASS_EXPORT(derived);

...

base * b = new derived; ar << b;  // b will be "sliced" - only the base class part will be serialized !!!

In this case the user is almost certainly making a mistake which will be exceeding difficult to find.  What's more, he well probably have to send inumermable emails to this list alleging that the serialization library has a bug and I will have do debug his program for him..  If you want

There is no hierarchy in my case, in fact it is just a struct with data members and shared_ptr's that link everything together, it does not compile, that is pretty irritating to have to create a freaking virtual function in a struct when it holds nothing but data.