Re: [Boost-users] [multi_index] MSVS 2005 visualizers?

Bill Buklis 29.5.2007 18:56:

Sub-patterns are done by using independent visualizer patterns for that type. Of course, this isn't always practical when using complex templates. I ran into this problem for ptr_map. I wanted to express ptr_map's underyling std::map, but couldn't because there was no way to include a visualizer just for std::map. How could I possibly convert void* without knowing what it is?

Sure, but I needed to pattern-match the watched expression's parent class in this way, which is not possible. The primary pattern in my example was multi_index_container<*,*,*>, and I wanted another match as header_holder<*,*> or something like this. The debugger just can not match the header_holder. The problem is that the pattern matching mechanism works at the most-derived-class level, and the parent classes can not be accessed AFAIK.

My workaround was to display the "keys" in the preview and the "values" in the expansion. If I could've defined a sub-pattern than I could've done the same thing as std::map and show both keys and values in the preview and in expansion.

For multi-index the templates are complex enough that I'm not sure you'll be able to separate out the sub-members and express them using a unique visualizer. Maybe.

All I wanted was a simple list-like view of the members, which is possible with indexed_by >. So I hoped that there would be a way to (perhaps) utilize the raw store, or something like this... Cheers, Filip