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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_MASK_JUN_03_2011_0929PM)
#define BOOST_SPIRIT_LEX_PLAIN_TOKENID_MASK_JUN_03_2011_0929PM
#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/support/handles_container.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>
#include <boost/lexical_cast.hpp>
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
// enables tokenid_mask(id)
template <typename A0>
struct use_terminal<qi::domain
, terminal_ex<tag::tokenid_mask, fusion::vector1<A0> >
> : mpl::or_<is_integral<A0>, is_enum<A0> > {};
// enables *lazy* tokenid_mask(id)
template <>
struct use_lazy_terminal<
qi::domain, tag::tokenid_mask, 1
> : mpl::true_ {};
}}
namespace boost { namespace spirit { namespace qi
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
using spirit::tokenid_mask;
#endif
using spirit::tokenid_mask_type;
///////////////////////////////////////////////////////////////////////////
// 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.
// Additionally it applies the given mask to the matched token id.
template <typename Mask>
struct plain_tokenid_mask
: primitive_parser<plain_tokenid_mask<Mask> >
{
template <typename Context, typename Iterator>
struct attribute
{
typedef Mask type;
};
plain_tokenid_mask(Mask const& mask)
: mask(mask) {}
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 mask 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 ((t.id() & mask) == id_type(mask))
{
spirit::traits::assign_to(t.id(), attr);
++first;
return true;
}
}
return false;
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("tokenid_mask",
"tokenid_mask(" + boost::lexical_cast<utf8_string>(mask) + ")");
}
Mask mask;
};
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
template <typename Modifiers, typename Mask>
struct make_primitive<terminal_ex<tag::tokenid_mask, fusion::vector1<Mask> >
, Modifiers>
{
typedef plain_tokenid_mask<Mask> result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, unused_type) const
{
return result_type(fusion::at_c<0>(term.args));
}
};
}}}
namespace boost { namespace spirit { namespace traits
{
///////////////////////////////////////////////////////////////////////////
template<typename Mask, typename Attr, typename Context, typename Iterator>
struct handles_container<qi::plain_tokenid_mask<Mask>, Attr, Context, Iterator>
: mpl::true_
{};
}}}
#endif
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Swift