unable to iterate through a "non-explicitly-declared" mpl::set

[wheber@…]

Iteration through the elements of an explicitly declared mpl::set works as advertised. However, if the set is not explicitly declared, iteration does not compile.

Here is a simple case:

typedef set<> empty_set;
BOOST_MPL_ASSERT_RELATION(size<empty_set>::value, ==, 0);

typedef insert<empty_set, char>::type set2_t;
BOOST_MPL_ASSERT_RELATION(size<set2_t>::value, ==, 1);
//test iterating through the mpl.set:
typedef begin<set2_t>::type set2_itr0_t;
BOOST_MPL_ASSERT((is_same<deref<set2_itr0_t>::type, char>::type));
typedef next<set2_itr0_t>::type set2_itr1_t;//compile error at this line
BOOST_MPL_ASSERT((is_same<set2_itr1_t, end<set2_t>::type>::type));

Both compilers I've been able to try report the error (msvc 8.0 and gcc 3.4.4).

[Aleksey Gurtovoy]

This bug has been fixed in 1.35 release.