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// file : libbrep/wrapper-traits.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef LIBBREP_WRAPPER_TRAITS_HXX
#define LIBBREP_WRAPPER_TRAITS_HXX
#include <odb/pre.hxx>
#include <libbutl/optional.mxx>
#include <odb/wrapper-traits.hxx>
namespace odb
{
template <typename T>
class wrapper_traits<butl::optional<T>>
{
public:
typedef T wrapped_type;
typedef butl::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 = wrapper_type ();
}
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 // LIBBREP_WRAPPER_TRAITS_HXX
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