diff options
Diffstat (limited to 'boost/core/swap.hpp')
| -rw-r--r-- | boost/core/swap.hpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/boost/core/swap.hpp b/boost/core/swap.hpp index baa1be970d..eff6b978df 100644 --- a/boost/core/swap.hpp +++ b/boost/core/swap.hpp @@ -21,13 +21,19 @@ // avoid ambiguity when swapping objects of a Boost type that does // not have its own boost::swap overload. +#include <boost/core/enable_if.hpp> +#include <boost/config.hpp> #include <utility> //for std::swap (C++11) #include <algorithm> //for std::swap (C++98) #include <cstddef> //for std::size_t -#include <boost/config.hpp> namespace boost_swap_impl { + // we can't use type_traits here + + template<class T> struct is_const { enum _vt { value = 0 }; }; + template<class T> struct is_const<T const> { enum _vt { value = 1 }; }; + template<class T> BOOST_GPU_ENABLED void swap_impl(T& left, T& right) @@ -51,7 +57,8 @@ namespace boost { template<class T1, class T2> BOOST_GPU_ENABLED - void swap(T1& left, T2& right) + typename enable_if_c< !boost_swap_impl::is_const<T1>::value && !boost_swap_impl::is_const<T2>::value >::type + swap(T1& left, T2& right) { ::boost_swap_impl::swap_impl(left, right); } |