[Boost-users] [multi_index] MSVC 8.0 visualizer for indexed_by<sequenced<>, ...> containers

31 May 2007

      Hello all,

for those interested, here is an alpha version of a MSVC-8.0 visualizer
for multi_index_containers whose first index is sequenced<>. To try it
out, insert autoexp.dat.txt contents into your

   Microsoft Visual Studio 8\Common7\Packages\Debugger\autoexp.dat

For your container to be visualized, you need to call the
VISUALIZE_MULTI_INDEX_CONTAINER macro at the global namespace level (see
the attached example, test2.cpp, and the screenshot of a test2.cpp
debugging session, sample.png).

Comments / suggestions are welcome!

Things that need attention:
- of course, containers whose first index is not sequenced<>
- maybe there is a better way of enforcing template instantiation...?
- possible name conflict issues, you guys probably know better than I do :-)

Cheers,
Filip

P.S.: My colleague says that this is black magic, so beware :-)

#include "common.hpp"

int wmain() {
  cont test_cont;
  test_cont.push_back(test(L"aaa"));
  test_cont.push_back(test(L"bbb"));
  test_cont.push_back(test(L"bbbx"));
  test_cont.push_back(test(L"bbbss"));
 test_cont.push_back(test(L"ccc", L"ddd"));
  return 0; // see screenshot
}

#ifndef MIC_VISUALIZER_HPP
#define MIC_VISUALIZER_HPP

template<typename T>
struct multi_index_helper {
};
template<typename T>
struct multi_index_helper_2 {
};
template<typename T>
struct multi_index_helper_3 {
};

#define __VISUALIZE_MIC_INDEX_DEF(Type)                         \
          boost::multi_index::detail::multi_index_node_type<    \
            Type::value_type,                                   \
            Type::index_specifier_type_list,                    \
            std::allocator<Type::value_type> >::type

/// Enables MSVC visualizers for multi_index_container Type
#define VISUALIZE_MULTI_INDEX_CONTAINER(Type)                   \
template<>                                                      \
struct multi_index_helper_2<Type> {                             \
  typedef __VISUALIZE_MIC_INDEX_DEF(Type) index_node_type;      \
  typedef                                                       \
    boost::base_from_member<                                    \
      boost::detail::allocator::rebind_to<                      \
        std::allocator<Type::value_type>,                       \
        index_node_type                                         \
      >::type>                                                  \
  base_type;                                                    \
  typedef                                                       \
    boost::multi_index::detail::header_holder<                  \
      index_node_type, Type>                                    \
  header_holder_type;                                           \
  typedef                                                       \
    boost::multi_index::detail::multi_index_base_type<          \
      Type::value_type,                                         \
      Type::index_specifier_type_list,                          \
      std::allocator<Type::value_type> >::type                  \
  index_type;                                                   \
  /* mimic multi_index_container layout */                      \
  base_type          base;                                      \
  header_holder_type header;                                    \
  index_type         index;                                     \
  unsigned int       node_count;                                \
  /* ensure that the debugger sees this template instance */    \
  static void get() {                                           \
    multi_index_helper_2<Type> *ensure_inst=0;                  \
  }                                                             \
};                                                              \
template<>                                                      \
struct multi_index_helper_3<Type> {                             \
  typedef __VISUALIZE_MIC_INDEX_DEF(Type) index_node_type;      \
  typedef                                                       \
    boost::multi_index::detail::header_holder<                  \
      index_node_type, Type>                                    \
  header_holder_type;                                           \
  typedef                                                       \
    boost::multi_index::detail::multi_index_base_type<          \
      Type::value_type,                                         \
      Type::index_specifier_type_list,                          \
      std::allocator<Type::value_type> >::type                  \
  index_type;                                                   \
  /* mimic multi_index_container layout from header field */    \
  header_holder_type header;                                    \
  index_type         index;                                     \
  unsigned int       node_count;                                \
  /* ensure that the debugger sees this template instance */    \
  static void get() {                                           \
    multi_index_helper_3<Type> *ensure_inst=0;                  \
  }                                                             \
};                                                              \
template<>                                                      \
struct multi_index_helper<__VISUALIZE_MIC_INDEX_DEF(Type)> {    \
  typedef __VISUALIZE_MIC_INDEX_DEF(Type) index_node_type;      \
  /* mimic index_node_base<Type::value_type> layout */          \
  Type::value_type value;                                       \
  /* ensure that the debugger sees this template instance */    \
  static void get() {                                           \
    multi_index_helper<index_node_type> *ensure_inst=0;         \
  }                                                             \
};

#endif

;-------------------------------
; boost::multi_index_container
;
boost::multi_index::detail::header_holder<boost::multi_index::detail::sequenced_index_node<*>,*>{
  preview(#("multi_index_container data"))
  children(
    #(
      #list(
            head : *(((boost::multi_index::detail::sequenced_index_node_impl*)(boost::multi_index::detail::sequenced_index_node_trampoline<$T1>*)($c.member))->next_),
            size : ((multi_index_helper_3<$T2>*)&$c)->node_count,
            next : next_
      ) : *(multi_index_helper<boost::multi_index::detail::sequenced_index_node<$T1> >*)(boost::multi_index::detail::sequenced_index_node<$T1>*)(boost::multi_index::detail::sequenced_index_node_trampoline<$T1>*)(&$e)
    )
  )
}
multi_index_helper<*> {
 preview(#($c.value))
 children(#(value:$c.value))
}
boost::multi_index::multi_index_container<*,*,*>{
  preview(#($c.node_count, " nodes"))
  children(
    #(
      data:((multi_index_helper_2<boost::multi_index::multi_index_container<$T1,$T2,$T3> >*)&$c)->header,
      original members: [$c,!]
    )
  )
}

[Boost-users] [multi_index] MSVC 8.0 visualizer for indexed_by<sequenced<>, ...> containers

Filip Konvička