85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
==============================================================================*/
|
|
#if !defined(BOOST_SPIRIT_EXTENDED_VARIANT_AUGUST_6_2011_0859AM)
|
|
#define BOOST_SPIRIT_EXTENDED_VARIANT_AUGUST_6_2011_0859AM
|
|
|
|
#if defined(_MSC_VER)
|
|
#pragma once
|
|
#endif
|
|
|
|
#include <boost/variant.hpp>
|
|
#include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
namespace boost { namespace spirit
|
|
{
|
|
template <
|
|
BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(
|
|
BOOST_VARIANT_LIMIT_TYPES,
|
|
typename T, boost::detail::variant::void_)
|
|
// We should not be depending on detail::variant::void_
|
|
// but I'm not sure if this can fixed. Any other way is
|
|
// clumsy at best.
|
|
>
|
|
struct extended_variant
|
|
{
|
|
// tell spirit that this is an adapted variant
|
|
struct adapted_variant_tag;
|
|
|
|
typedef boost::variant<
|
|
BOOST_VARIANT_ENUM_PARAMS(T)>
|
|
variant_type;
|
|
typedef typename variant_type::types types;
|
|
|
|
typedef extended_variant<BOOST_VARIANT_ENUM_PARAMS(T)> base_type;
|
|
|
|
extended_variant() : var() {}
|
|
|
|
template <typename T>
|
|
extended_variant(T const& var)
|
|
: var(var) {}
|
|
|
|
template <typename F>
|
|
typename F::result_type apply_visitor(F const& v)
|
|
{
|
|
return var.apply_visitor(v);
|
|
}
|
|
|
|
template <typename F>
|
|
typename F::result_type apply_visitor(F const& v) const
|
|
{
|
|
return var.apply_visitor(v);
|
|
}
|
|
|
|
template <typename F>
|
|
typename F::result_type apply_visitor(F& v)
|
|
{
|
|
return var.apply_visitor(v);
|
|
}
|
|
|
|
template <typename F>
|
|
typename F::result_type apply_visitor(F& v) const
|
|
{
|
|
return var.apply_visitor(v);
|
|
}
|
|
|
|
variant_type const& get() const
|
|
{
|
|
return var;
|
|
}
|
|
|
|
variant_type& get()
|
|
{
|
|
return var;
|
|
}
|
|
|
|
variant_type var;
|
|
};
|
|
}}
|
|
|
|
#endif
|