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Use GCC aligned attribute to simplify type_with_alignment

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[SVN r20690]
This commit is contained in:
Douglas Gregor
2003-11-06 01:25:30 +00:00
parent 5e66227e35
commit 314d866dc9
1 changed files with 25 additions and 0 deletions
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25
include/boost/type_traits/type_with_alignment.hpp
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@@ -141,6 +141,31 @@ class type_with_alignment
typedef align_t type;
};
#if defined(__GNUC__)
namespace align {
struct __attribute__((__aligned__(2))) a2 {};
struct __attribute__((__aligned__(4))) a4 {};
struct __attribute__((__aligned__(8))) a8 {};
struct __attribute__((__aligned__(16))) a16 {};
struct __attribute__((__aligned__(32))) a32 {};
}
template<> class type_with_alignment<1> { public: typedef char type; };
template<> class type_with_alignment<2> { public: typedef align::a2 type; };
template<> class type_with_alignment<4> { public: typedef align::a4 type; };
template<> class type_with_alignment<8> { public: typedef align::a8 type; };
template<> class type_with_alignment<16> { public: typedef align::a16 type; };
template<> class type_with_alignment<32> { public: typedef align::a32 type; };
namespace detail {
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a2,true)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a4,true)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a8,true)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a16,true)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,::boost::align::a32,true)
}
#endif
#else
//