diff options
Diffstat (limited to 'odb/boost/optional')
-rw-r--r-- | odb/boost/optional/wrapper-traits.hxx | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/odb/boost/optional/wrapper-traits.hxx b/odb/boost/optional/wrapper-traits.hxx new file mode 100644 index 0000000..04f4b55 --- /dev/null +++ b/odb/boost/optional/wrapper-traits.hxx @@ -0,0 +1,59 @@ +// file : odb/boost/optional/wrapper-traits.hxx +// author : Boris Kolpackov <boris@codesynthesis.com> +// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#ifndef ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX +#define ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX + +#include <odb/pre.hxx> + +#include <boost/none.hpp> +#include <boost/optional.hpp> + +#include <odb/wrapper-traits.hxx> + +namespace odb +{ + template <typename T> + class wrapper_traits< ::boost::optional<T> > + { + public: + typedef T wrapped_type; + typedef ::boost::optional<T> wrapper_type; + + static const bool null_handler = true; + static const bool null_default = true; + + static bool + get_null (const wrapper_type& o) + { + return !o; + } + + static void + set_null (wrapper_type& o) + { + o = ::boost::none; + } + + static const wrapped_type& + get_ref (const wrapper_type& o) + { + return *o; + } + + static wrapped_type& + set_ref (wrapper_type& o) + { + if (!o) + o = T (); + + return *o; + } + }; +} + +#include <odb/post.hxx> + +#endif // ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX |