Re: [boost] [move] moving temporaries of copyable types

Subject: Re: [boost] [move] moving temporaries of copyable types
From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2009-08-10 11:07:10

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On Monday 10 August 2009, Ion Gaztañaga wrote:
> David Abrahams escribió:
> >
> > In both cases the temporary should get RVO'd (i.e. the copy should be
> > elided) on all modern compilers.  If you can find a modern compiler
> > where Boost.Move does not RVO, then its design needs to be fixed.

Does Boost.Move support moveable-but-not-copyable types?  Could this cause 
compile errors for such types when compiling with optimization turned off?

> Yes in case of constructors but not with assigments:
>
> clone_ptr<MyClass> p;
>
> for(){
>    p = return_rvalue();
> }
>
> Although I guess that this missed optimization might not be so
> important. The same could be applied to containers
>
> //With old approach, copied instead
> vector.push_back(return_rvalue());

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