[patch] libstdc++/61143 make unordered containers usable after move

[François Dumont]

On 20/05/2014 21:36, Jonathan Wakely wrote:
>
> OK. My sketch above avoided calling _M_moved_from() more than once per
> object, but the compiler should be able to optimise your version to
> avoid multiple calls anyway.
>
>> Here is the new patch limited to what I really want to commit this time.
>
> Great. Please commit to trunk and the 4.9 branch - thanks!
>
>
     As I have integrated your remarks I won't have time to commit this 
evening. So I submit this update here, just in case you want to see it 
again and I will commit tomorrow.

     I finally use a simplified version of your sketch in the swap 
implementation.

François

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