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