c++-mode/class11: turn Doxygen comments into placeholder fields
c++-mode/class11: turn Doxygen comments into placeholder fields

See AndreaCrotti/yasnippet-snippets#138

ageekymonk/yasnippet-snippets,cook/yasnippet-snippets,cook/yasnippet-snippets,ageekymonk/yasnippet-snippets,ageekymonk/yasnippet-snippets,cook/yasnippet-snippets