diff options
| author | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-20 11:53:03 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-20 11:53:03 +0200 |
| commit | 8c257b1754ed55280c39e69a9b83065f4ca7fc80 (patch) | |
| tree | 9224f9a00b065ed19cf73ace6bc31f7a6e58e9a9 | |
| parent | 3b728e0a21245871db9f70ba15a00e45f9741698 (diff) | |
Change query syntax to use . for composite and -> for object pointer access
Also make non-inverse query columns act as both an object pointer and a
normal column. The latter allows us to use natural expressions such as
query<employee>::employer.is_null ().
| -rw-r--r-- | odb/query.hxx | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/odb/query.hxx b/odb/query.hxx index 82fb411..d89a4e6 100644 --- a/odb/query.hxx +++ b/odb/query.hxx @@ -23,6 +23,24 @@ namespace odb template <typename T, const char* table> struct pointer_query_columns; + // Object pointer syntax wrapper. + // + template <typename T> + struct query_pointer + { + query_pointer () + { + // For some reason GCC needs this dummy c-tor if we make a static + // data member of this type const. + } + + T* + operator-> () const + { + return 0; // All members in T are static. + } + }; + // // template <typename T, class_kind kind = class_traits<T>::kind> |