On Fri, Jul 31, 2015 at 10:21 PM, Alex Merry <alex.me...@kde.org> wrote:
> On Friday 31 July 2015 21:27:45 Mark Gaiser wrote: > > So the one thing we know fairly certain right now is that MSVC 2012 is > not > > going to be the deal breaker here. > > I'm still not 100% sure about GCC and Clang though.. > > Well, the pages you linked to in your earlier email said GCC supports > rvalue > references since 4.3 (except *this, but I don't think that's a big deal) > [0], > while clang has supported them since 2.9 [1]. > > In fact, the compiler requirements page you linked says that rvalue > references > (except *this) are unconditionally supported in Frameworks. I guess you > were > looking for the text "move semantics", but they're essentially the same > thing > (rvalues are the language feature required to implement move semantics). > > I mean, I guess there's also standard library support, although we don't > care > that much about the containers, since we use Qt equivalent. > > libstdc++ (GNU's implementation) has supported the move and forward helpers > since at least GCC 4.6 [3] (that's the earliest version of the libstdc++ > manual that's online), and I would be surprised if they weren't in at least > GCC 4.4. > > MSVC has the move and forward helpers in 2010, as I've mentioned [4]. > > libc++ (LLVM's implementation for Clang) is irritatingly vague about when > any > particular feature was implemented, but I'd be highly surprised if whatever > libc++ shipped with Clang 3.0, let alone 3.1, didn't include move and > forward. > > tl;dr: yes, you can use move semantics. I'll make that more explicit on the > wiki page. > > Alex > > > [0]: https://gcc.gnu.org/projects/cxx0x.html > [1]: http://clang.llvm.org/cxx_status.html > [2]: https://community.kde.org/Frameworks/ > Policies#Frameworks_compiler_requirements_and_C.2B.2B11 > [3]: https://gcc.gnu.org/onlinedocs/gcc-4.6.4/libstdc++/manual/manual/ > status.html#status.iso.200x > [4]: https://msdn.microsoft.com/en-us/library/0ah2zh0s%28v=vs.100%29.aspx > > Funny, you're tl;dr is at the bottom ;) I'm glad you found more details on the rvalue references (i was indeed looking for move semantics). Thank you for your help and clarifying the wiki page!
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