| // 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 |