ambiguous member when calling upper_bound_rank

[Rob Rose <rrose@…>]

When using a boost::multi_index::multi_index_container with ranked indices, trying to call upper_bound_rank on any but the last ranked index listed in the indexed_by template parameter of the multi_index_container gives the following compiler error (in gcc 4.9, and MSVC 14 gives a similar error):

/usr/local/boost_1_63_0/boost/multi_index/detail/rnk_index_ops.hpp:216:22: error: request for member ‘size’ is ambiguous
   std::size_t s=top->size;
                      ^
In file included from /home/aqsystem/repos/md/cpp/test_proj/main.cpp:2:0:
/usr/local/boost_1_63_0/boost/multi_index/ranked_index.hpp:32:15: note: candidates are: std::size_t boost::multi_index::detail::ranked_node<boost::multi_index::detail::ordered_index_node_compressed_base<boost::multi_index::detail::rank_policy, std::allocator<char> > >::size
   std::size_t size;
               ^
/usr/local/boost_1_63_0/boost/multi_index/ranked_index.hpp:32:15: note:                 std::size_t boost::multi_index::detail::ranked_node<boost::multi_index::detail::ordered_index_node_compressed_base<boost::multi_index::detail::rank_policy, std::allocator<char> > >::size
make[3]: *** [test_proj/CMakeFiles/test_proj.dir/main.cpp.o] Error 1

Attached is code that exhibits this error- you can see that trying to call upper_bound_rank on the first or second index of the multi_index_container produces the compiler error given above, and that calling it on the third (and final ranked) index does not. Changing the fourth index to be ranked_unique or ranked_non_unique will cause the third index to also product the above compiler error.

[Joaquín M López Muñoz]

Hi Rob, thanks for reporting this bug, fixed at:

​https://github.com/boostorg/multi_index/commit/3e1095d6098a2ef28c796be4a99371a82b4ebd3e

Will try to push the commit to Boost 1.64, otherwise it'll go with Boost 1.65.

[Rob Rose <rrose@…>]

Replying to joaquin: thanks joaquin, that was fast!

Hi Rob, thanks for reporting this bug, fixed at:

​https://github.com/boostorg/multi_index/commit/3e1095d6098a2ef28c796be4a99371a82b4ebd3e

Will try to push the commit to Boost 1.64, otherwise it'll go with Boost 1.65.