Hi again,
I am doing some helper class that will pad the space after a given type
until it reaches a machine word boundary. This word boundary would be the
maximum of (alignment_of<T>::value - sizeof(char)) where T is any
'typename', 'typename' is one of {is_class<U>::value == false} and U is any
type.
I would like some help to isolate the most effective way to define
BOOST_DATA_ALIGNMENT in the following example (defined by default to 8 --
based on std headers).
I would like to propose padding_of<> at the same time.
template <typename T>
struct padding_of
{
size_t const BOOST_DATA_ALIGNMENT = 8;
size_t const value = (BOOST_DATA_ALIGNMENT - sizeof(T) %
BOOST_DATA_ALIGNMENT) % BOOST_DATA_ALIGNMENT;
};
template <typename T>
struct padded
{
T type;
char padding[padding_of<T>::value]; // can be of size 0!
};
template <typename T>
struct shifted_object : padded<counted_base>
{
T value;
};
Thanks,
Philippe A. Bouchard
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