1 | // |
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2 | // Copyright (c) 2006 João Abecasis |
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3 | // |
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4 | // Distributed under the Boost Software License, Version 1.0. (See |
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5 | // accompanying file LICENSE_1_0.txt or copy at |
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6 | // http://www.boost.org/LICENSE_1_0.txt) |
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7 | // |
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8 | |
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9 | //////////////////////////////////////////////////////////////////////////////// |
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10 | // |
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11 | // As reported by Jascha Wetzel, in |
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12 | // http://article.gmane.org/gmane.comp.parsers.spirit.general/9013, the |
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13 | // directives gen_ast_node_d and gen_pt_node_d were not working for lack of |
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14 | // appropriate conversion constructors in the underlying tree match policies. |
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15 | // |
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16 | //////////////////////////////////////////////////////////////////////////////// |
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17 | |
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18 | #include <boost/spirit/core.hpp> |
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19 | #include <boost/spirit/tree/ast.hpp> |
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20 | #include <boost/spirit/tree/parse_tree.hpp> |
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21 | |
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22 | using namespace boost::spirit; |
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23 | |
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24 | struct my_grammar : grammar<my_grammar> |
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25 | { |
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26 | template <class Scanner> |
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27 | struct definition |
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28 | { |
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29 | typedef |
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30 | scanner< |
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31 | typename Scanner::iterator_t, |
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32 | scanner_policies< |
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33 | typename Scanner::iteration_policy_t, |
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34 | ast_match_policy< |
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35 | typename Scanner::match_policy_t::iterator_t, |
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36 | typename Scanner::match_policy_t::factory_t |
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37 | >, |
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38 | typename Scanner::action_policy_t |
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39 | > |
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40 | > ast_scanner; |
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41 | |
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42 | typedef |
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43 | scanner< |
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44 | typename Scanner::iterator_t, |
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45 | scanner_policies< |
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46 | typename Scanner::iteration_policy_t, |
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47 | pt_match_policy< |
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48 | typename Scanner::match_policy_t::iterator_t, |
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49 | typename Scanner::match_policy_t::factory_t |
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50 | >, |
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51 | typename Scanner::action_policy_t |
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52 | > |
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53 | > pt_scanner; |
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54 | |
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55 | typedef rule<ast_scanner> ast_rule; |
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56 | typedef rule<pt_scanner> pt_rule; |
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57 | typedef rule<Scanner> rule_; |
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58 | |
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59 | definition(my_grammar const & /* self */) |
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60 | { |
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61 | start_ = gen_ast_node_d[ ast_rule_ ]; |
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62 | start_ = gen_pt_node_d[ pt_rule_ ]; |
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63 | } |
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64 | |
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65 | rule_ const & start() const |
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66 | { |
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67 | return start_; |
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68 | } |
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69 | |
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70 | rule_ start_; |
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71 | ast_rule ast_rule_; |
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72 | pt_rule pt_rule_; |
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73 | }; |
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74 | }; |
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75 | |
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76 | int main() |
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77 | { |
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78 | const char * begin, * end; |
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79 | |
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80 | pt_parse(begin, end, my_grammar()); |
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81 | ast_parse(begin, end, my_grammar()); |
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82 | } |
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