| 1 | /*============================================================================= |
|---|---|
| 2 | Copyright (c) 2001-2014 Joel de Guzman |
| 3 | |
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 6 | =============================================================================*/ |
| 7 | #if !defined(BOOST_SPIRIT_X3_CALC8_EXPRESSION_DEF_HPP) |
| 8 | #define BOOST_SPIRIT_X3_CALC8_EXPRESSION_DEF_HPP |
| 9 | |
| 10 | #include <boost/spirit/home/x3.hpp> |
| 11 | #include <boost/spirit/home/x3/support/utility/annotate_on_success.hpp> |
| 12 | #include "ast.hpp" |
| 13 | #include "ast_adapted.hpp" |
| 14 | #include "expression.hpp" |
| 15 | #include "common.hpp" |
| 16 | #include "error_handler.hpp" |
| 17 | |
| 18 | namespace client { namespace parser |
| 19 | { |
| 20 | using x3::uint_; |
| 21 | using x3::char_; |
| 22 | using x3::raw; |
| 23 | using x3::lexeme; |
| 24 | using namespace x3::ascii; |
| 25 | |
| 26 | struct additive_expr_class; |
| 27 | struct multiplicative_expr_class; |
| 28 | struct unary_expr_class; |
| 29 | struct primary_expr_class; |
| 30 | |
| 31 | typedef x3::rule<additive_expr_class, ast::expression> additive_expr_type; |
| 32 | typedef x3::rule<multiplicative_expr_class, ast::expression> multiplicative_expr_type; |
| 33 | typedef x3::rule<unary_expr_class, ast::operand> unary_expr_type; |
| 34 | typedef x3::rule<primary_expr_class, ast::operand> primary_expr_type; |
| 35 | |
| 36 | expression_type const expression = "expression"; |
| 37 | additive_expr_type const additive_expr = "additive_expr"; |
| 38 | multiplicative_expr_type const multiplicative_expr = "multiplicative_expr"; |
| 39 | unary_expr_type unary_expr = "unary_expr"; |
| 40 | primary_expr_type primary_expr = "primary_expr"; |
| 41 | |
| 42 | auto const additive_expr_def = |
| 43 | multiplicative_expr |
| 44 | >> *( (char_('+') > multiplicative_expr) |
| 45 | | (char_('-') > multiplicative_expr) |
| 46 | ) |
| 47 | ; |
| 48 | |
| 49 | auto const multiplicative_expr_def = |
| 50 | unary_expr |
| 51 | >> *( (char_('*') > unary_expr) |
| 52 | | (char_('/') > unary_expr) |
| 53 | ) |
| 54 | ; |
| 55 | |
| 56 | auto const unary_expr_def = |
| 57 | primary_expr |
| 58 | | (char_('-') > primary_expr) |
| 59 | | (char_('+') > primary_expr) |
| 60 | ; |
| 61 | |
| 62 | auto const primary_expr_def = |
| 63 | uint_ |
| 64 | | identifier |
| 65 | | '(' > expression > ')' |
| 66 | ; |
| 67 | |
| 68 | auto const expression_def = additive_expr; |
| 69 | |
| 70 | BOOST_SPIRIT_DEFINE( |
| 71 | expression |
| 72 | , additive_expr |
| 73 | , multiplicative_expr |
| 74 | , unary_expr |
| 75 | , primary_expr |
| 76 | ); |
| 77 | |
| 78 | struct unary_expr_class : x3::annotate_on_success {}; |
| 79 | struct primary_expr_class : x3::annotate_on_success {}; |
| 80 | |
| 81 | }} |
| 82 | |
| 83 | namespace client |
| 84 | { |
| 85 | parser::expression_type const& expression() |
| 86 | { |
| 87 | return parser::expression; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | #endif |
| 92 |