220 5216 <aa993593-2e71-4c1e-a510-d678672e5c17@isocpp.org> article
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From: Mikhail Semenov <mikhailsemenov1957@gmail.com>
Newsgroups: gmane.comp.lang.c++.isocpp.proposals
Subject: Re: Teachability problems with std::move
Date: Tue, 25 Jun 2013 10:55:47 -0700 (PDT)
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I would suggest writing something like that:
 
*std::unique_ptr<const Foo> FooFactory() {*
*  std::unique_ptr<const Foo> result(static_cast<const Foo*>(new Foo));*
*  // ...*
*  return result;*
*}*
 
Then you don't need to deal with implicit conversions and writing *return 
std::move(result);*.
 
On the other hand, if you need to change the newly created Foo value: just 
deal with it first and then create the unique_ptr and return it.

 

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<div>I would suggest writing something like that:</div><div><div>&nbsp;</di=
v><div><strong>std::unique_ptr&lt;const Foo&gt; FooFactory() {</strong></di=
v><div><strong>&nbsp; std::unique_ptr&lt;const Foo&gt; result(static_cast&l=
t;const Foo*&gt;(new Foo));</strong></div><div><strong>&nbsp; // ...</stron=
g></div><div><strong>&nbsp; return result;</strong></div><div><strong>}</st=
rong></div></div><div>&nbsp;</div><div>Then you don't need to deal with imp=
licit conversions and writing <strong>return std::move(result);</strong>.</=
div><div>&nbsp;</div><div>On the other hand, if you need to change the newl=
y created Foo value: just deal with it first and then create the unique_ptr=
 and return it.</div><div><br>
</div>

<p></p>

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