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I wonder if there is a chance to get it expicitly stated in the standard
that, in  cases like the one below, the move constructor (or even higher
optimization, like re-use) should be used (not the copy constructor):
auto f()
{
    double a[] = {0.1, 2.0, 3.5};
    std::vector<double>v1(a,a+3);
    return [v1](){ return v1; };    // use move (or re-use) not copy
}

I have noticed that some developers started writing their own captures,
which explicitly use move.
At the same time, some compilers (like Visual C++) already provide
optimization.
I think the users should not re-invent the wheel.



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<DIV>I wonder if there is a chance to get it expicitly stated in the standard that, in&nbsp; cases like the one below, the move constructor (or even higher optimization, like re-use) should be used (not the copy constructor):</DIV>
<DIV>auto f()<BR>{<BR>&nbsp;&nbsp;&nbsp; double a[] = {0.1, 2.0, 3.5};<BR>&nbsp;&nbsp;&nbsp; std::vector&lt;double&gt;v1(a,a+3);<BR>&nbsp;&nbsp;&nbsp; return [v1](){ return v1; };&nbsp;&nbsp; &nbsp;// use move (or re-use) not copy<BR>}</DIV>
<DIV>&nbsp;</DIV>
<DIV>I have noticed that some&nbsp;developers started writing their own captures, which&nbsp;explicitly use move. </DIV>
<DIV>At the same time, some compilers (like Visual C++) already provide optimization.&nbsp; </DIV>
<DIV>I think the users should not re-invent the wheel.</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>

<p></p>

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