I've created a simple reproduction on my box. It seems that checked_guard isn't causing the problem directly. It calls nil_guard, which uses std::bind.
I'm going to see if I can replace the std::bind call with one that captures appropriately. -Erich On Mon, 2015-08-03 at 22:36 +0530, ak.ashwini1981 wrote: > out parameter are due to the underlying C-API. > > the checked-guard mainly checks tge nullptr params... which i am > taking care of otherwise.. > > checked-guard takes in rvalue reference.. and forwards that. this > created the doubt. > > i will share the code snippet here.. > > thanks. > Ashwini > > On "Keane, Erich" <erich.keane at intel.com>, 3 Aug 2015 22:02 wrote: > We'd prefer to keep the checked-guard, since its purpose is to > ensure > that all errors are consistently thrown throughout the > process. > > We tend to avoid out-parameters so far in the C++ stack due to > the > inherent concerns with it, but if it is the only way to do it, > I'd wish > to see as soon as possible to make sure it is necessary. > > As far as std::forward, my understanding is that it should > maintain the > reference-ness of the parameters, so we could potentially have > an issue. > > Got a sample that you could share? If I get time I could take > a look. > > -Erich > > > On Mon, 2015-08-03 at 21:58 +0530, ak.ashwini1981 wrote: > > > > > > Hi Erich, List, > > > > > > > > I am working on the Provisioning Manager apis from C++ > space. > > > > > > > > Intention is to have an out parameter in the function. The > parameter > > is a vector. I am passing this by reference. Pushing objects > to vector > > are not reflecting at the calling point. > > > > > > > > On debugging found that the reference pointers are > different at two > > sides of the checked_guard() function. > > > > Guess the std::forward is doing the trick here. > > > > > > > > Can I do without the checked_guard() and do the required > param > > validation and call the InProcClientWrapper function. > > > > > > > > Share your inputs. > > > > > > > > Thanks, > > > > Ashwini > > >
