Date: Thu, 6 Mar 2014 17:28:29 +0400 From: Dmitry Marakasov <amdmi3@amdmi3.ru> To: =?utf-8?Q?Jean-S=C3=A9bastien_P=C3=A9dron?= <dumbbell@FreeBSD.org> Cc: Koop Mast <kwm@FreeBSD.org>, freebsd-toolchain@freebsd.org Subject: Re: Various issues with Clang and libc++ while playing with OpenCL (FYI) Message-ID: <20140306132829.GB92463@hades.panopticon> In-Reply-To: <53170AD1.4090506@FreeBSD.org> References: <53170AD1.4090506@FreeBSD.org>
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* Jean-S=C3=A9bastien P=C3=A9dron (dumbbell@FreeBSD.org) wrote: > 3. Our base libc++ has a bug in the <functional> header. I posted a PR > on Mesa bug tracker here, before I found out it was a problem with > libc++: > https://bugs.freedesktop.org/show_bug.cgi?id=3D75505 >=20 > Apparently, it's fixed in libc++ upstream, in r199848. Hm, is this by the chance the same bug as the following? Either way, it would be nice to get it fixed in 10-stable. --- % cat 1.cc=20 #include <functional> int main() { std::function<void()> f =3D [](){}; return 0; } % clang++ -std=3Dc++11 1.cc=20 % clang++34 -std=3Dc++11 1.cc=20 In file included from 1.cc:1: In file included from /usr/include/c++/v1/functional:465: In file included from /usr/include/c++/v1/memory:603: /usr/include/c++/v1/tuple:320:11: error: rvalue reference to type '<lambd= a at 1.cc:3:40>' cannot bind to lvalue of type '<lambda at 1.cc:3:40>' : value(__t.get()) ^ ~~~~~~~~~ /usr/include/c++/v1/tuple:444:8: note: in instantiation of member functio= n 'std::__1::__tuple_leaf<0, <lambda at 1.cc:3:40> &&, false>::__tuple_le= af' requested here struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...> ^ /usr/include/c++/v1/functional:1286:26: note: in instantiation of member = function 'std::__1::__function::__func<<lambda at 1.cc:3:40>, std::__1::a= llocator<<lambda at 1.cc:3:40> >, void ()>::__func' requested here ::new (__f_) _FF(_VSTD::move(__f)); ^ 1.cc:3:40: note: in instantiation of function template specialization 'st= d::__1::function<void ()>::function<<lambda at 1.cc:3:40> >' requested he= re int main() { std::function<void()> f =3D [](){}; return 0; } ^ In file included from 1.cc:1: In file included from /usr/include/c++/v1/functional:465: In file included from /usr/include/c++/v1/memory:603: /usr/include/c++/v1/tuple:321:10: error: static_assert failed "Can not co= py a tuple with rvalue reference member" {static_assert(!is_rvalue_reference<_Hp>::value, "Can not copy a = tuple with rvalue reference member");} ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/v1/tuple:320:11: error: rvalue reference to type 'alloca= tor<[...]>' cannot bind to lvalue of type 'allocator<[...]>' : value(__t.get()) ^ ~~~~~~~~~ /usr/include/c++/v1/tuple:444:8: note: in instantiation of member functio= n 'std::__1::__tuple_leaf<0, std::__1::allocator<<lambda at 1.cc:3:40> > = &&, false>::__tuple_leaf' requested here struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...> ^ /usr/include/c++/v1/functional:1294:34: note: in instantiation of member = function 'std::__1::__function::__func<<lambda at 1.cc:3:40>, std::__1::a= llocator<<lambda at 1.cc:3:40> >, void ()>::__func' requested here ::new (__hold.get()) _FF(_VSTD::move(__f), allocator<_Fp>(__a= )); ^ 1.cc:3:40: note: in instantiation of function template specialization 'st= d::__1::function<void ()>::function<<lambda at 1.cc:3:40> >' requested he= re int main() { std::function<void()> f =3D [](){}; return 0; } ^ In file included from 1.cc:1: In file included from /usr/include/c++/v1/functional:465: In file included from /usr/include/c++/v1/memory:603: /usr/include/c++/v1/tuple:321:10: error: static_assert failed "Can not co= py a tuple with rvalue reference member" {static_assert(!is_rvalue_reference<_Hp>::value, "Can not copy a = tuple with rvalue reference member");} ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4 errors generated. --- --=20 Dmitry Marakasov . 55B5 0596 FF1E 8D84 5F56 9510 D35A 80DD F9D2 F77D amdmi3@amdmi3.ru ..: jabber: amdmi3@jabber.ru http://www.amdmi3.ru
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