Subject: Re: [boost] C++03 unique_ptr emulation
From: Howard Hinnant (hinnant_at_[hidden])
Date: 2009-01-08 12:52:02
On Jan 8, 2009, at 12:42 PM, Ion Gaztañaga wrote:
> is quite problematic for container implementation. With the old
> emulation (that returned detail::rv<T>) this was possible:
> class vector
> void push_back(const value_type &);
> void push_back(boost::detail::rv<value_type>);
Is it practical to do this instead?
void push_back(value_type x); // internally move construct from x
You take a performance hit on lvalue copyable expressions which are
expensive to move. But it gives you the functionality of:
void push_back(const value_type&);
And there is no hit on rvalue expressions (if I recall correctly, it
has been a little while since I did this survey).
I don't know, but from conversations with Sean, I suspect this is the
direction the Adobe move emulation took.
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