Trouble with std::forward and fusion vector using clang 3.4 and older library - is there a workaround?
I am trying to compile using clang 3.4 and -std=c++11.
With the -std=c++11 it compiles and runs without any issue.
With -std=c++11 I get
boost_1_60_0\boost/fusion/container/vector/vector.hpp:126:20: error: no
template named 'forward' in namespace 'std'; did you mean
'advance_detail::forward'?
return std::forward<result>(*advance_c<N>(begin(seq)));
and many similar errors.
I have tried all the boost
BOOST_NO_CXX11_HDR_ macros but not found one that resolves this issue.
I don't have any choice about compiler version or library version due to
other constraints.
Any suggestions appreciated,
Stan
*#include*
Hi Stan, Sorry for quite late reply. On 2016/12/06 22:42, Stan Blakey wrote:
With the -std=c++11 it compiles and runs without any issue. With -std=c++11 I get Which line is correct?
boost_1_60_0\boost/fusion/container/vector/vector.hpp:126:20: error: no template named 'forward' in namespace 'std'; did you mean 'advance_detail::forward'?
return std::forward<result>(*advance_c<N>(begin(seq)));
and many similar errors. Which standard library (and its version) are you using?
If your standard library provides `std::forward` and it functions normally, try `BOOST_NO_CXX11_CONSTEXPR`. Kohei Takahashi
Hi Kohei,
Sorry it is without --std=c++11 that every thing is fine.
The boost code manages to solve not having std::forward when compiled
without the std=c++11 flag.
With --std=c++11 I get the compiler errors about missing std::forward.
I have tried all the boost macros that pertain to library features with
no success. I did at the option BOOST_NO_CXX11_CONSTEXPR and this doesn't
work either. The compiler is the full clang 3.4 and does support c++11
features such as constexpr. It is the library that is old.
std::printf("GLIBCXX: %d\n",__GLIBCXX__);
produces
GLIBCXX: 20070514
Below is the full source with all the macros I have on:
Stan
*#define* BOOST_NO_CXX11_HDR_TYPE_TRAITS
*#define* BOOST_NO_CXX11_HDR_ATOMIC
*#define* BOOST_NO_CXX11_HDR_ARRAY
*#define* BOOST_NO_CXX11_HDR_CHRONO
*#define* BOOST_NO_CXX11_HDR_CODECVT
*#define* BOOST_NO_CXX11_HDR_CONDITION_VARIABLE
*#define* BOOST_NO_CXX11_HDR_FORWARD_LIST
*#define* BOOST_NO_CXX11_HDR_FUNCTIONAL
*#define* BOOST_NO_CXX11_HDR_FUTURE
*#define* BOOST_NO_CXX11_HDR_INITIALIZER_LIST
*#define* BOOST_NO_CXX11_HDR_MUTEX
*#define* BOOST_NO_CXX11_HDR_RANDOM
*#define* BOOST_NO_CXX11_HDR_RATIO
*#define* BOOST_NO_CXX11_HDR_SYSTEM_ERROR
*#define* BOOST_NO_CXX11_HDR_THREAD
*#define* BOOST_NO_CXX11_HDR_TUPLE
*#define* BOOST_NO_CXX11_HDR_TYPEINDEX
*#define* BOOST_NO_CXX11_HDR_TYPE_TRAITS
*#define* BOOST_NO_CXX11_HDR_UNORDERED_MAP
*#define* BOOST_NO_CXX11_NUMERIC_LIMITS
*#define* BOOST_NO_CXX11_SMART_PTR
*#define* BOOST_NO_CXX11_STD_UNORDERED
*#define* BOOST_NO_CXX11_ADDRESSOF
*#define* BOOST_NO_CXX11_ALLOCATOR
*#define* BOOST_NO_CXX11_ATOMIC_SMART_PTR
*#undef* BOOST_FUSION_HAS_VARIADIC_VECTOR
*#include*
Hi Stan,
Sorry for quite late reply. On 2016/12/06 22:42, Stan Blakey wrote:
With the -std=c++11 it compiles and runs without any issue. With -std=c++11 I get
Which line is correct?
boost_1_60_0\boost/fusion/container/vector/vector.hpp:126:20: error: no template named 'forward' in namespace 'std'; did you mean 'advance_detail::forward'?
return std::forward<result>(*advance_c<N>(begin(seq))); and many similar errors.
Which standard library (and its version) are you using?
If your standard library provides `std::forward` and it functions normally, try `BOOST_NO_CXX11_CONSTEXPR`.
Kohei Takahashi
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Hi Stan, On 2016/12/15 20:42, Stan Blakey wrote:
I have tried all the boost macros that pertain to library features with no success. I did at the option BOOST_NO_CXX11_CONSTEXPR and this doesn't work either. The compiler is the full clang 3.4 and does support c++11 features such as constexpr. It is the library that is old.
std::printf("GLIBCXX: %d\n",__GLIBCXX__);
produces
GLIBCXX: 20070514
Wow... It's gcc4.2.0... OK, I think `BOOST_NO_CXX11_RVALUE_REFERENCES` will fix this issue (and disable variadic fusion::vector). Kohei
Kohei,
Yes that works. Thanks.
Stan
On Thu, Dec 15, 2016 at 8:03 PM, Kohei Takahashi
Hi Stan,
On 2016/12/15 20:42, Stan Blakey wrote:
I have tried all the boost macros that pertain to library features with no success. I did at the option BOOST_NO_CXX11_CONSTEXPR and this doesn't work either. The compiler is the full clang 3.4 and does support c++11 features such as constexpr. It is the library that is old.
std::printf("GLIBCXX: %d\n",__GLIBCXX__);
produces
GLIBCXX: 20070514
Wow... It's gcc4.2.0...
OK, I think `BOOST_NO_CXX11_RVALUE_REFERENCES` will fix this issue (and disable variadic fusion::vector).
Kohei
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
participants (2)
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Kohei Takahashi -
Stan Blakey