Terje Slettebø wrote:
> The part about RVO was really concerned with the out() scenario, not
> in_out(). I'm not sure if passing a smart pointer buys you very much. In
> this case, the smart pointer is const but the pointee is not, so the "const"
> in the signature is really just masking what is go
>From: "Noel Yap" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> > The compiler may elide such copy, even if the temporary being returned
is a
> > named variable, and several compilers (such as g++ and the EDG based
ones),
> > does this optimisation (RVO). For example:
>
> Playing devil's advocate,
Terje Slettebø wrote:
> The compiler may elide such copy, even if the temporary being returned is a
> named variable, and several compilers (such as g++ and the EDG based ones),
> does this optimisation (RVO). For example:
>
>
Playing devil's advocate, I think RVO can easily be fooled with
not-so
Just to add some to my previous posting.
Also, from a maintenance POV, having variables that doesn't change
throughout a function (or program), tends to make it easier to understand.
Having functions which change their arguments goes rather against that.
One exception is input stream operators, w
>From: "Justin M. Lewis" <[EMAIL PROTECTED]>
> As for a function returning a single param, I agree, normally you'd just
> return it, UNLESS it's some big structure you don't want being copied
> all over the place, then passing it by reference to a function makes
> more sense.
The compiler may eli
on, it's explicit at the invocation.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bo Persson
Sent: Wednesday, April 23, 2003 11:32 AM
To: [EMAIL PROTECTED]
Subject: [boost] Re: Re: class proposal
"Justin M. Lewis" <[EMAIL PROTECTED]> s
"Justin M. Lewis" <[EMAIL PROTECTED]> skrev i meddelandet
news:[EMAIL PROTECTED]
> Not entirely, passing a pointer doesn't tell you that the parameter will
> change, it just tells you that it might, it still leaves you in the
position
> of having to track down the function and check it. But outsi
