/usr/include/odb/boost/optional/wrapper-traits.hxx is in libodb-boost-dev 2.4.0-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// copyright : Copyright (c) 2009-2015 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;
// T can be const.
//
typedef
typename odb::details::meta::remove_const<T>::result
unrestricted_wrapped_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 unrestricted_wrapped_type&
set_ref (wrapper_type& o)
{
if (!o)
o = unrestricted_wrapped_type ();
return const_cast<unrestricted_wrapped_type&> (*o);
}
};
}
#include <odb/post.hxx>
#endif // ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
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