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Subject: Re: [boost] [shared_ptr] calling functions by reference
From: Olaf van der Spek (ml_at_[hidden])
Date: 2011-05-29 07:05:36

On Sun, May 29, 2011 at 4:36 AM, Sid Sacek <ssacek_at_[hidden]> wrote:
> This might be a unimportant question and may have already been answered many times before, but I was wondering about functions that take shared pointers as arguments. Is there ever a reason I would not want to use a shared_ptr reference as an argument? I can't think of any, but is there any?

Yes, I think. If the function makes a copy of the argument, passing by
value might allow you to take advantage of move semantics (if the
callee doesn't need the argument anymore), whereas passing by (const)
reference doesn't.


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