| 1 | /*============================================================================= |
|---|---|
| 2 | Copyright (c) 2001-2015 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_REPR_REXPR_DEF_HPP) |
| 8 | #define BOOST_SPIRIT_X3_REPR_REXPR_DEF_HPP |
| 9 | |
| 10 | #include "ast.hpp" |
| 11 | #include "ast_adapted.hpp" |
| 12 | #include "error_handler.hpp" |
| 13 | #include "rexpr.hpp" |
| 14 | |
| 15 | #include <boost/spirit/home/x3.hpp> |
| 16 | #include <boost/spirit/home/x3/support/utility/annotate_on_success.hpp> |
| 17 | |
| 18 | namespace rexpr { namespace parser |
| 19 | { |
| 20 | namespace x3 = boost::spirit::x3; |
| 21 | namespace ascii = boost::spirit::x3::ascii; |
| 22 | |
| 23 | using x3::lit; |
| 24 | using x3::lexeme; |
| 25 | |
| 26 | using ascii::char_; |
| 27 | using ascii::string; |
| 28 | |
| 29 | /////////////////////////////////////////////////////////////////////////// |
| 30 | // Rule IDs |
| 31 | /////////////////////////////////////////////////////////////////////////// |
| 32 | |
| 33 | struct rexpr_value_class; |
| 34 | struct rexpr_key_value_class; |
| 35 | struct rexpr_inner_class; |
| 36 | |
| 37 | /////////////////////////////////////////////////////////////////////////// |
| 38 | // Rules |
| 39 | /////////////////////////////////////////////////////////////////////////// |
| 40 | |
| 41 | x3::rule<rexpr_value_class, ast::rexpr_value> const |
| 42 | rexpr_value = "rexpr_value"; |
| 43 | |
| 44 | x3::rule<rexpr_key_value_class, ast::rexpr_key_value> const |
| 45 | rexpr_key_value = "rexpr_key_value"; |
| 46 | |
| 47 | x3::rule<rexpr_inner_class, ast::rexpr> const |
| 48 | rexpr_inner = "rexpr"; |
| 49 | |
| 50 | rexpr_type const rexpr = "rexpr"; |
| 51 | |
| 52 | /////////////////////////////////////////////////////////////////////////// |
| 53 | // Grammar |
| 54 | /////////////////////////////////////////////////////////////////////////// |
| 55 | |
| 56 | auto const quoted_string = |
| 57 | lexeme['"' >> *(char_ - '"') >> '"']; |
| 58 | |
| 59 | auto const rexpr_value_def = |
| 60 | quoted_string | rexpr_inner; |
| 61 | |
| 62 | auto const rexpr_key_value_def = |
| 63 | quoted_string > '=' > rexpr_value; |
| 64 | |
| 65 | auto const rexpr_inner_def = |
| 66 | '{' > *rexpr_key_value > '}'; |
| 67 | |
| 68 | auto const rexpr_def = rexpr_inner_def; |
| 69 | |
| 70 | BOOST_SPIRIT_DEFINE(rexpr_value, rexpr, rexpr_inner, rexpr_key_value); |
| 71 | |
| 72 | /////////////////////////////////////////////////////////////////////////// |
| 73 | // Annotation and Error handling |
| 74 | /////////////////////////////////////////////////////////////////////////// |
| 75 | |
| 76 | // We want these to be annotated with the iterator position. |
| 77 | struct rexpr_value_class : x3::annotate_on_success {}; |
| 78 | struct rexpr_key_value_class : x3::annotate_on_success {}; |
| 79 | struct rexpr_inner_class : x3::annotate_on_success {}; |
| 80 | |
| 81 | // We want error-handling only for the start (outermost) rexpr |
| 82 | // rexpr is the same as rexpr_inner but without error-handling (see error_handler.hpp) |
| 83 | struct rexpr_class : x3::annotate_on_success, error_handler_base {}; |
| 84 | }} |
| 85 | |
| 86 | namespace rexpr |
| 87 | { |
| 88 | parser::rexpr_type const& rexpr() |
| 89 | { |
| 90 | return parser::rexpr; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | #endif |
| 95 |