54 lines
2.2 KiB
C++
54 lines
2.2 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_SPIRIT_CALC7_EXPRESSION_HPP)
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#define BOOST_SPIRIT_CALC7_EXPRESSION_HPP
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///////////////////////////////////////////////////////////////////////////////
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// Spirit v2.5 allows you to suppress automatic generation
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// of predefined terminals to speed up complation. With
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// BOOST_SPIRIT_NO_PREDEFINED_TERMINALS defined, you are
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// responsible in creating instances of the terminals that
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// you need (e.g. see qi::uint_type uint_ below).
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#define BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// Uncomment this if you want to enable debugging
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// #define BOOST_SPIRIT_QI_DEBUG
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/spirit/include/qi.hpp>
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#include "ast.hpp"
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#include "error_handler.hpp"
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#include <vector>
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namespace client { namespace parser
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{
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namespace qi = boost::spirit::qi;
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namespace ascii = boost::spirit::ascii;
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///////////////////////////////////////////////////////////////////////////////
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// The expression grammar
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///////////////////////////////////////////////////////////////////////////////
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template <typename Iterator>
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struct expression : qi::grammar<Iterator, ast::expression(), ascii::space_type>
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{
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expression(error_handler<Iterator>& error_handler);
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qi::rule<Iterator, ast::expression(), ascii::space_type> expr;
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qi::rule<Iterator, ast::expression(), ascii::space_type> additive_expr;
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qi::rule<Iterator, ast::expression(), ascii::space_type> multiplicative_expr;
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qi::rule<Iterator, ast::operand(), ascii::space_type> unary_expr;
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qi::rule<Iterator, ast::operand(), ascii::space_type> primary_expr;
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qi::rule<Iterator, std::string(), ascii::space_type> identifier;
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};
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}}
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#endif
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