on Fri Nov 02 2012, paul Fultz <pfultz2-AT-yahoo.com> wrote:
----- Original Message -----
From: Dave Abrahams <dave@boostpro.com> To: boost@lists.boost.org Cc: Sent: Thursday, November 1, 2012 2:53 PM Subject: Re: [boost] [variant] Basic rvalue and C++11 features support
on Thu Nov 01 2012, "Vicente J. Botet Escriba" <vicente.botet-AT-wanadoo.fr> wrote:
Le 01/11/12 18:57, Antony Polukhin a écrit :
Hi,
There is a patch in ticket #7620 that adds some rvalue assignment operators and rvalue constructors for Boost.Variant library.
I saw no activity from authors of Boost.Variant Eric Friedman and Itay Maman for a long time, so if there will be no objections, I'll commit patch to trunk in the middle of November.
Any suggestions and comments are welcomed.
Hi,
I have not analyzed completely the patch but I see that Boost.Move is not used to emulate move semantics on C++98. Is there a deep reason to don't use it?
Interesting, as this will compile:
struct foo { foo() {} boost::variant<int, float> x; };
int main() { foo a; a = foo(); }
But if it were to use Boost.Move, this will no longer compile, breaking barkwards compatibility.
Oh, *that* old problem again! I agree that it's searious. I guess Boost.Move is not-very-usable in that case. I wonder if Boost.Move could use whatever technique boost::variant does? -- Dave Abrahams BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost