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| author | Boris Kolpackov <boris@codesynthesis.com> | 2010-07-30 13:23:50 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2010-07-30 13:23:50 +0200 |
| commit | 08de79b43a09b02a7b8feae2a9c12005d4bbb878 (patch) | |
| tree | 6d593ddd026faf67627c3574461ab8e12e23b642 | |
| parent | a902c57dbe101a698101d601ce69df1cda038701 (diff) | |
Add value type traits
| -rw-r--r-- | odb/traits.hxx | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/odb/traits.hxx b/odb/traits.hxx index 8aee00c..aa98ae1 100644 --- a/odb/traits.hxx +++ b/odb/traits.hxx @@ -7,6 +7,7 @@ #define ODB_TRAITS_HXX #include <odb/forward.hxx> +#include <odb/buffer.hxx> #include <odb/shared-ptr.hxx> #include <odb/pointer-traits.hxx> @@ -88,6 +89,30 @@ namespace odb pointer_traits<typename access::object_traits<T>::pointer_type> pointer_ops; }; + + template <typename V> + struct value_traits + { + typedef V value_type; + + template <typename I> + static void + set_value (value_type& v, I i, bool is_null) + { + if (!is_null) + v = value_type (i); + else + v = value_type (); + } + + template <typename I> + static void + set_image (I& i, bool& is_null, value_type v) + { + is_null = false; + i = I (v); + } + }; } #endif // ODB_TRAITS_HXX |