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Subject: Re: [boost] [variant] Please vote for behavior
From: Dave Abrahams (dave_at_[hidden])
Date: 2013-01-31 15:17:44

on Thu Jan 31 2013, Paul Smith <> wrote:

> On Thu, Jan 31, 2013 at 9:24 AM, Antony Polukhin <antoshkka_at_[hidden]> wrote:
>> From theoretical point of view you are absolutely correct, and my
>> example is lame. Moreover, current implementation of move assignment
>> and move constructors for recursive_wrapper were implemented to model
>> that behavior.
> Just pointing out that move assignment is not affected by this
> discussion. Everything is already allocated so it's as efficient as a
> pointer swap.

Actually the correct semantics of move assignment is the same as "swap +
clear" if there's an empty state. See

I recommend reading the whole article.

Dave Abrahams
BoostPro Computing                  Software Development        Training             Clang/LLVM/EDG Compilers  C++  Boost

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