-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Stephan T. Lavavej Sent: Thursday, June 23, 2011 10:43 PM To: boost@lists.boost.org Subject: Re: [boost] numeric_cast
[Fernando Cacciola]
It looks fine to me (except maybe for the #pragma once... is that properly supported on all supported compilers?)
[Brandon Kohn]
Ah, right. We use that at my work (all MSVC). So I'm acclimated. I'll remove those.
Actually, the best thing to do is this:
#ifndef MYPROJECT_MYDIRECTORY_FOOBAR_HPP #define MYPROJECT_MYDIRECTORY_FOOBAR_HPP
#ifdef _MSC_VER #pragma once #endif // _MSC_VER
meow;
#endif // MYPROJECT_MYDIRECTORY_FOOBAR_HPP
This way, all compilers get the portable idempotency guard. Because it's on the outside, GCC (and
Sorry for last response (I have just got back from holiday :-) I suspect we are all agreed this is correct? If so should it go into our Boost style 'recommendations' docs somewhere? Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com possibly
other compilers) will magically recognize it and avoid opening the header file twice. And the #pragma once for MSVC also instructs it to avoid opening the header file twice, which can improve build perf and can't hurt.
Stephan T. Lavavej Visual C++ Libraries Developer _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost