diff options
Diffstat (limited to 'contrib/src/boost/move/detail/type_traits.hpp')
| -rw-r--r-- | contrib/src/boost/move/detail/type_traits.hpp | 34 |
1 files changed, 14 insertions, 20 deletions
diff --git a/contrib/src/boost/move/detail/type_traits.hpp b/contrib/src/boost/move/detail/type_traits.hpp index 816fdca..1b5d838 100644 --- a/contrib/src/boost/move/detail/type_traits.hpp +++ b/contrib/src/boost/move/detail/type_traits.hpp @@ -55,8 +55,10 @@ // BOOST_MOVE_IS_POD(T) should evaluate to true if T is a POD type // BOOST_MOVE_HAS_TRIVIAL_CONSTRUCTOR(T) should evaluate to true if "T x;" has no effect // BOOST_MOVE_HAS_TRIVIAL_COPY(T) should evaluate to true if T(t) <==> memcpy +// (Note: this trait does not guarantee T is copy constructible, the copy constructor could be deleted but still be trivial) // BOOST_MOVE_HAS_TRIVIAL_MOVE_CONSTRUCTOR(T) should evaluate to true if T(boost::move(t)) <==> memcpy // BOOST_MOVE_HAS_TRIVIAL_ASSIGN(T) should evaluate to true if t = u <==> memcpy +// (Note: this trait does not guarantee T is assignable , the copy assignmen could be deleted but still be trivial) // BOOST_MOVE_HAS_TRIVIAL_MOVE_ASSIGN(T) should evaluate to true if t = boost::move(u) <==> memcpy // BOOST_MOVE_HAS_TRIVIAL_DESTRUCTOR(T) should evaluate to true if ~T() has no effect // BOOST_MOVE_HAS_NOTHROW_CONSTRUCTOR(T) should evaluate to true if "T x;" can not throw @@ -117,9 +119,7 @@ # define BOOST_MOVE_HAS_TRIVIAL_CONSTRUCTOR(T) __has_trivial_constructor(T) # endif # if __has_feature(has_trivial_copy) -# //There are problems with deleted copy constructors detected as trivially copyable. -# //http://stackoverflow.com/questions/12754886/has-trivial-copy-behaves-differently-in-clang-and-gcc-whos-right -# define BOOST_MOVE_HAS_TRIVIAL_COPY(T) (__has_trivial_copy(T) && ::boost::move_detail::is_copy_constructible<T>::value) +# define BOOST_MOVE_HAS_TRIVIAL_COPY(T) __has_trivial_copy(T) # endif # if __has_feature(has_trivial_assign) # define BOOST_MOVE_HAS_TRIVIAL_ASSIGN(T) (__has_trivial_assign(T) ) @@ -235,7 +235,9 @@ #endif #ifdef BOOST_MOVE_HAS_TRIVIAL_COPY - #define BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) BOOST_MOVE_HAS_TRIVIAL_COPY(T) + #define BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) ::boost::move_detail::is_pod<T>::value ||\ + (::boost::move_detail::is_copy_constructible<T>::value &&\ + BOOST_MOVE_HAS_TRIVIAL_COPY(T)) #else #define BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) ::boost::move_detail::is_pod<T>::value #endif @@ -246,12 +248,6 @@ #define BOOST_MOVE_IS_TRIVIALLY_DEFAULT_CONSTRUCTIBLE(T) ::boost::move_detail::is_pod<T>::value #endif -#ifdef BOOST_MOVE_HAS_TRIVIAL_COPY - #define BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) BOOST_MOVE_HAS_TRIVIAL_COPY(T) -#else - #define BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) ::boost::move_detail::is_pod<T>::value -#endif - #ifdef BOOST_MOVE_HAS_TRIVIAL_MOVE_CONSTRUCTOR #define BOOST_MOVE_IS_TRIVIALLY_MOVE_CONSTRUCTIBLE(T) BOOST_MOVE_HAS_TRIVIAL_MOVE_CONSTRUCTOR(T) #else @@ -259,7 +255,9 @@ #endif #ifdef BOOST_MOVE_HAS_TRIVIAL_ASSIGN - #define BOOST_MOVE_IS_TRIVIALLY_COPY_ASSIGNABLE(T) BOOST_MOVE_HAS_TRIVIAL_ASSIGN(T) + #define BOOST_MOVE_IS_TRIVIALLY_COPY_ASSIGNABLE(T) ::boost::move_detail::is_pod<T>::value ||\ + ( ::boost::move_detail::is_copy_assignable<T>::value &&\ + BOOST_MOVE_HAS_TRIVIAL_ASSIGN(T)) #else #define BOOST_MOVE_IS_TRIVIALLY_COPY_ASSIGNABLE(T) ::boost::move_detail::is_pod<T>::value #endif @@ -821,9 +819,7 @@ struct is_trivially_copy_constructible { //In several compilers BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE return true even with //deleted copy constructors so make sure the type is copy constructible. - static const bool value = ::boost::move_detail::is_pod<T>::value || - ( ::boost::move_detail::is_copy_constructible<T>::value && - BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) ); + static const bool value = BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T); }; ////////////////////////////////////// @@ -831,7 +827,7 @@ struct is_trivially_copy_constructible ////////////////////////////////////// template<class T> struct is_trivially_move_constructible -{ static const bool value = BOOST_MOVE_IS_TRIVIALLY_MOVE_CONSTRUCTIBLE(T); }; +{ static const bool value = BOOST_MOVE_IS_TRIVIALLY_MOVE_CONSTRUCTIBLE(T); }; ////////////////////////////////////// // is_trivially_copy_assignable @@ -841,9 +837,7 @@ struct is_trivially_copy_assignable { //In several compilers BOOST_MOVE_IS_TRIVIALLY_COPY_CONSTRUCTIBLE return true even with //deleted copy constructors so make sure the type is copy constructible. - static const bool value = ::boost::move_detail::is_pod<T>::value || - ( ::boost::move_detail::is_copy_assignable<T>::value && - BOOST_MOVE_IS_TRIVIALLY_COPY_ASSIGNABLE(T) ); + static const bool value = BOOST_MOVE_IS_TRIVIALLY_COPY_ASSIGNABLE(T); }; ////////////////////////////////////// @@ -1005,7 +999,7 @@ BOOST_MOVE_ALIGNED_STORAGE_WITH_BOOST_ALIGNMENT(0x1000) template<class T, std::size_t Len> union aligned_union -{ +{ T aligner; char dummy[Len]; }; @@ -1023,7 +1017,7 @@ struct aligned_next<Len, Align, T, true> //End of search defaults to max_align_t template<std::size_t Len, std::size_t Align> struct aligned_next<Len, Align, max_align_t, false> -{ typedef aligned_union<max_align_t, Len> type; }; +{ typedef aligned_union<max_align_t, Len> type; }; //Now define a search list through types #define BOOST_MOVE_ALIGNED_NEXT_STEP(TYPE, NEXT_TYPE)\ |