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Make sure that aligned_storage<>::type really is a POD type.

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[SVN r28475]
This commit is contained in:
John Maddock
2005-04-25 16:42:08 +00:00
parent 7c8c40f0fa
commit 74e3b91d8f
1 changed files with 26 additions and 10 deletions
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36
include/boost/aligned_storage.hpp
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@ -35,16 +35,15 @@ BOOST_STATIC_CONSTANT(
, alignment_of_max_align = ::boost::alignment_of<max_align>::value
);
}} // namespace detail::aligned_storage
//
// To be TR1 conforming this must be a POD type:
//
template <
std::size_t size_
, std::size_t alignment_ = std::size_t(-1)
, std::size_t alignment_
>
class aligned_storage
struct aligned_storage_imp
{
private: // representation
union data_t
{
char buf[size_];
@ -55,10 +54,23 @@ private: // representation
, type_with_alignment<alignment_>
>::type align_;
} data_;
};
}} // namespace detail::aligned_storage
template <
std::size_t size_
, std::size_t alignment_ = std::size_t(-1)
>
class aligned_storage
{
private: // representation
detail::aligned_storage::aligned_storage_imp<size_, alignment_> data_;
public: // constants
typedef aligned_storage<size_, alignment_> type;
typedef detail::aligned_storage::aligned_storage_imp<size_, alignment_> type;
BOOST_STATIC_CONSTANT(
std::size_t
@ -106,14 +118,14 @@ public: // accessors
void* address()
{
return &data_.buf[0];
return this;
}
#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
const void* address() const
{
return &data_.buf[0];
return this;
}
#else // MSVC6
@ -138,8 +150,12 @@ const void* aligned_storage<S,A>::address() const
#endif // MSVC6 workaround
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
//
// Make sure that is_pod recognises aligned_storage<>::type
// as a POD (Note that aligned_storage<> itself is not a POD):
//
template <std::size_t size_, std::size_t alignment_>
struct is_pod<boost::aligned_storage<size_,alignment_> >
struct is_pod<boost::detail::aligned_storage::aligned_storage_imp<size_,alignment_> >
BOOST_TT_AUX_BOOL_C_BASE(true)
{
BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(true)