[Boost-users] [serialization] The famous non-const value trap

Subject: [Boost-users] [serialization] The famous non-const value trap
From: cc caprani (cc.caprani_at_[hidden])
Date: 2011-08-25 20:45:02

Hi Boosters,

I had the compile time warning discussed here (
http://boost.2283326.n4.nabble.com/Serialization-C4308-warning-with-MSVC9-td2600175.html)
that Robert is probably fed up discussing. I've read for months, but didn't
want to const_cast my object (or is it ok sometimes?). However, making my
destructor virtual removed the warning. Here's my question: why does making
the object destructor virtual remove the warning, effectively making my
object instances const?

And the section on this trap from the Rationale section of the Serialization
documentation is not in the1.47 version (howcome?) but can be found in
previous version here:
http://www.boost.org/doc/libs/1_39_0/libs/serialization/doc/rationale.html#trap

Oh, and please forgive me if the answer is *obvious* - just an intermediate
programmer.

Colin