| /*============================================================================= |
| Copyright (c) 2014 Eric Niebler |
| Copyright (c) 2014 Kohei Takahashi |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| #if !defined(FUSION_SUPPORT_CONFIG_01092014_1718) |
| #define FUSION_SUPPORT_CONFIG_01092014_1718 |
| |
| #include <boost/config.hpp> |
| #include <boost/detail/workaround.hpp> |
| |
| #ifndef BOOST_FUSION_GPU_ENABLED |
| #define BOOST_FUSION_GPU_ENABLED BOOST_GPU_ENABLED |
| #endif |
| |
| // Enclose with inline namespace because unqualified lookup of GCC < 4.5 is broken. |
| // |
| // namespace detail { |
| // struct foo; |
| // struct X { }; |
| // } |
| // |
| // template <typename T> void foo(T) { } |
| // |
| // int main() |
| // { |
| // foo(detail::X()); |
| // // prog.cc: In function 'int main()': |
| // // prog.cc:2: error: 'struct detail::foo' is not a function, |
| // // prog.cc:6: error: conflict with 'template<class T> void foo(T)' |
| // // prog.cc:10: error: in call to 'foo' |
| // } |
| namespace boost { namespace fusion { namespace detail |
| { |
| namespace barrier { } |
| using namespace barrier; |
| }}} |
| #define BOOST_FUSION_BARRIER_BEGIN namespace barrier { |
| #define BOOST_FUSION_BARRIER_END } |
| |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1900)) |
| // All of rvalue-reference ready MSVC don't perform implicit conversion from |
| // fundamental type to rvalue-reference of another fundamental type [1]. |
| // |
| // Following example doesn't compile |
| // |
| // int i; |
| // long &&l = i; // sigh..., std::forward<long&&>(i) also fail. |
| // |
| // however, following one will work. |
| // |
| // int i; |
| // long &&l = static_cast<long &&>(i); |
| // |
| // OK, now can we replace all usage of std::forward to static_cast? -- I say NO! |
| // All of rvalue-reference ready Clang doesn't compile above static_cast usage [2], sigh... |
| // |
| // References: |
| // 1. https://connect.microsoft.com/VisualStudio/feedback/details/1037806/implicit-conversion-doesnt-perform-for-fund |
| // 2. http://llvm.org/bugs/show_bug.cgi?id=19917 |
| // |
| // Tentatively, we use static_cast to forward if run under MSVC. |
| # define BOOST_FUSION_FWD_ELEM(type, value) static_cast<type&&>(value) |
| #else |
| # define BOOST_FUSION_FWD_ELEM(type, value) std::forward<type>(value) |
| #endif |
| |
| |
| // Workaround for LWG 2408: C++17 SFINAE-friendly std::iterator_traits. |
| // http://cplusplus.github.io/LWG/lwg-defects.html#2408 |
| // |
| // - GCC 4.5 enables the feature under C++11. |
| // https://gcc.gnu.org/ml/gcc-patches/2014-11/msg01105.html |
| // |
| // - MSVC 10.0 implements iterator intrinsics; MSVC 13.0 implements LWG2408. |
| #if (defined(BOOST_LIBSTDCXX_VERSION) && (BOOST_LIBSTDCXX_VERSION < 40500) && \ |
| defined(BOOST_LIBSTDCXX11)) || \ |
| (defined(BOOST_MSVC) && (1600 <= BOOST_MSVC || BOOST_MSVC < 1900)) |
| # define BOOST_FUSION_WORKAROUND_FOR_LWG_2408 |
| namespace std |
| { |
| template <typename> |
| struct iterator_traits; |
| } |
| #endif |
| |
| #endif |