Hi Szymon,

On 16 November 2011 10:40, Szymon Gatner <szymon.gatner@gmail.com> wrote:

I realize this is not really a multi-index bug but after I updated
from 1.47 to 1.48
my code no longer compiles due to this code:

template<typename SuperMeta,typename TagList>
inline boost::mpl::true_* boost_foreach_is_noncopyable(
boost::multi_index::detail::sequenced_index<SuperMeta,TagList>*&,
boost::foreach::tag)
{
return 0;
}

...snip...

this happens because as suggested in boost.foreach docs I have this earlier:

#define foreach BOOST_FOREACH

I'm not certain whether there's anything under-the-hood of multi_index that could do this, but since #define foreach BOOST_FOREACH was just an example, and the user could define any PP token to expand as such, a change to multi_index could only ever work around that one example.

I see a couple of possibilities for you: either #undef foreach before the above code, then #define it again afterwards, or use a name other than 'foreach'. Unfortunately (or not) this is just the way PP macros work, and why avoiding them is desirable - they are not namespaceable unlike real types & names.

--rob

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Rob Desbois
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