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/*=============================================================================
Copyright (c) 2001-2014 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_X3_ALTERNATIVE_JAN_07_2013_1131AM)
#define BOOST_SPIRIT_X3_ALTERNATIVE_JAN_07_2013_1131AM
#include <boost/spirit/home/x3/support/traits/attribute_of.hpp>
#include <boost/spirit/home/x3/core/parser.hpp>
#include <boost/spirit/home/x3/operator/detail/alternative.hpp>
namespace boost { namespace spirit { namespace x3
{
template <typename Left, typename Right>
struct alternative : binary_parser<Left, Right, alternative<Left, Right>>
{
typedef binary_parser<Left, Right, alternative<Left, Right>> base_type;
alternative(Left const& left, Right const& right)
: base_type(left, right) {}
template <typename Iterator, typename Context, typename RContext>
bool parse(
Iterator& first, Iterator const& last
, Context const& context, RContext& rcontext, unused_type) const
{
return this->left.parse(first, last, context, rcontext, unused)
|| this->right.parse(first, last, context, rcontext, unused);
}
template <typename Iterator, typename Context
, typename RContext, typename Attribute>
bool parse(
Iterator& first, Iterator const& last
, Context const& context, RContext& rcontext, Attribute& attr) const
{
return detail::parse_alternative(this->left, first, last, context, rcontext, attr)
|| detail::parse_alternative(this->right, first, last, context, rcontext, attr);
}
};
template <typename Left, typename Right>
inline alternative<
typename extension::as_parser<Left>::value_type
, typename extension::as_parser<Right>::value_type>
operator|(Left const& left, Right const& right)
{
return { as_parser(left), as_parser(right) };
}
}}}
namespace boost { namespace spirit { namespace x3 { namespace traits
{
template <typename Left, typename Right, typename Context>
struct attribute_of<x3::alternative<Left, Right>, Context>
: x3::detail::attribute_of_alternative<Left, Right, Context> {};
}}}}
#endif
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