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// Copyright (c) 2001-2011 Hartmut Kaiser
//
// 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_LEX_PLAIN_TOKENID_NOV_26_2010_0944AM)
#define BOOST_SPIRIT_LEX_PLAIN_TOKENID_NOV_26_2010_0944AM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/qi/detail/attributes.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/qi/skip_over.hpp>
#include <boost/spirit/home/qi/domain.hpp>
#include <boost/spirit/home/qi/parser.hpp>
#include <boost/spirit/home/qi/meta_compiler.hpp>
#include <boost/spirit/home/qi/detail/assign_to.hpp>
#include <boost/range/iterator_range.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/fusion/include/at.hpp>
#include <boost/mpl/or.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_enum.hpp>
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
// enables tokenid
template <>
struct use_terminal<qi::domain, tag::tokenid>
: mpl::true_ {};
// enables tokenid(id)
template <typename A0>
struct use_terminal<qi::domain
, terminal_ex<tag::tokenid, fusion::vector1<A0> >
> : mpl::or_<is_integral<A0>, is_enum<A0> > {};
// enables *lazy* tokenid(id)
template <>
struct use_lazy_terminal<
qi::domain, tag::tokenid, 1
> : mpl::true_ {};
}}
namespace boost { namespace spirit { namespace qi
{
using spirit::tokenid;
///////////////////////////////////////////////////////////////////////////
// The plain_tokenid represents a simple token defined by the lexer inside
// a Qi grammar. The difference to plain_token is that it exposes the
// matched token id instead of the iterator_range of the matched input.
template <typename TokenId>
struct plain_tokenid
: primitive_parser<plain_tokenid<TokenId> >
{
template <typename Context, typename Iterator>
struct attribute
{
typedef TokenId type;
};
plain_tokenid(TokenId const& id)
: id(id) {}
template <typename Iterator, typename Context
, typename Skipper, typename Attribute>
bool parse(Iterator& first, Iterator const& last
, Context& /*context*/, Skipper const& skipper
, Attribute& attr) const
{
qi::skip_over(first, last, skipper); // always do a pre-skip
if (first != last) {
// simply match the token id with the id this component has
// been initialized with
typedef typename
boost::detail::iterator_traits<Iterator>::value_type
token_type;
typedef typename token_type::id_type id_type;
token_type const& t = *first;
if (std::size_t(~0) == t.id() || id_type(id) == t.id()) {
spirit::traits::assign_to(id, attr);
++first;
return true;
}
}
return false;
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("tokenid");
}
TokenId id;
};
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
template <typename Modifiers>
struct make_primitive<tag::tokenid, Modifiers>
{
typedef plain_token<std::size_t> result_type;
result_type operator()(unused_type, unused_type) const
{
return result_type(std::size_t(~0));
}
};
template <typename Modifiers, typename TokenId>
struct make_primitive<terminal_ex<tag::tokenid, fusion::vector1<TokenId> >
, Modifiers>
{
typedef plain_tokenid<TokenId> result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, unused_type) const
{
return result_type(fusion::at_c<0>(term.args));
}
};
}}}
#endif
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Swift