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/*============================================================================= Copyright (c) 2002-2003 Hartmut Kaiser http://spirit.sourceforge.net/ Use, modification and distribution is subject to 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_FUNDAMENTAL_IPP) #define BOOST_SPIRIT_FUNDAMENTAL_IPP #include <boost/mpl/int.hpp> namespace boost { namespace spirit { BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN namespace impl { /////////////////////////////////////////////////////////////////////////// // // Helper template for counting the number of nodes contained in a // given parser type. // All parser_category type parsers are counted as nodes. // /////////////////////////////////////////////////////////////////////////// template <typename CategoryT> struct nodes; template <> struct nodes<plain_parser_category> { template <typename ParserT, typename LeafCountT> struct count { BOOST_STATIC_CONSTANT(int, value = (LeafCountT::value + 1)); }; }; template <> struct nodes<unary_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::subject_t subject_t; typedef typename subject_t::parser_category_t subject_category_t; BOOST_STATIC_CONSTANT(int, value = (nodes<subject_category_t> ::template count<subject_t, LeafCountT>::value + 1)); }; }; template <> struct nodes<action_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::subject_t subject_t; typedef typename subject_t::parser_category_t subject_category_t; BOOST_STATIC_CONSTANT(int, value = (nodes<subject_category_t> ::template count<subject_t, LeafCountT>::value + 1)); }; }; template <> struct nodes<binary_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::left_t left_t; typedef typename ParserT::right_t right_t; typedef typename left_t::parser_category_t left_category_t; typedef typename right_t::parser_category_t right_category_t; typedef count self_t; BOOST_STATIC_CONSTANT(int, leftcount = (nodes<left_category_t> ::template count<left_t, LeafCountT>::value)); BOOST_STATIC_CONSTANT(int, rightcount = (nodes<right_category_t> ::template count<right_t, LeafCountT>::value)); BOOST_STATIC_CONSTANT(int, value = ((self_t::leftcount) + (self_t::rightcount) + 1)); }; }; /////////////////////////////////////////////////////////////////////////// // // Helper template for counting the number of leaf nodes contained in a // given parser type. // Only plain_parser_category type parsers are counted as leaf nodes. // /////////////////////////////////////////////////////////////////////////// template <typename CategoryT> struct leafs; template <> struct leafs<plain_parser_category> { template <typename ParserT, typename LeafCountT> struct count { BOOST_STATIC_CONSTANT(int, value = (LeafCountT::value + 1)); }; }; template <> struct leafs<unary_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::subject_t subject_t; typedef typename subject_t::parser_category_t subject_category_t; BOOST_STATIC_CONSTANT(int, value = (leafs<subject_category_t> ::template count<subject_t, LeafCountT>::value)); }; }; template <> struct leafs<action_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::subject_t subject_t; typedef typename subject_t::parser_category_t subject_category_t; BOOST_STATIC_CONSTANT(int, value = (leafs<subject_category_t> ::template count<subject_t, LeafCountT>::value)); }; }; template <> struct leafs<binary_parser_category> { template <typename ParserT, typename LeafCountT> struct count { typedef typename ParserT::left_t left_t; typedef typename ParserT::right_t right_t; typedef typename left_t::parser_category_t left_category_t; typedef typename right_t::parser_category_t right_category_t; typedef count self_t; BOOST_STATIC_CONSTANT(int, leftcount = (leafs<left_category_t> ::template count<left_t, LeafCountT>::value)); BOOST_STATIC_CONSTANT(int, rightcount = (leafs<right_category_t> ::template count<right_t, LeafCountT>::value)); BOOST_STATIC_CONSTANT(int, value = (self_t::leftcount + self_t::rightcount)); }; }; } // namespace impl /////////////////////////////////////////////////////////////////////////////// BOOST_SPIRIT_CLASSIC_NAMESPACE_END }} // namespace boost::spirit #endif // !defined(BOOST_SPIRIT_FUNDAMENTAL_IPP)
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