| // |
| // Copyright (c) 2006 Joao Abecasis |
| // |
| // Distributed under 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) |
| // |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // As reported by Jascha Wetzel, in |
| // http://article.gmane.org/gmane.comp.parsers.spirit.general/9013, the |
| // directives gen_ast_node_d and gen_pt_node_d were not working for lack of |
| // appropriate conversion constructors in the underlying tree match policies. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| #include <boost/spirit/include/classic_core.hpp> |
| #include <boost/spirit/include/classic_ast.hpp> |
| #include <boost/spirit/include/classic_parse_tree.hpp> |
| |
| using namespace BOOST_SPIRIT_CLASSIC_NS; |
| |
| struct my_grammar : grammar<my_grammar> |
| { |
| template <class Scanner> |
| struct definition |
| { |
| typedef |
| scanner< |
| typename Scanner::iterator_t, |
| scanner_policies< |
| typename Scanner::iteration_policy_t, |
| ast_match_policy< |
| typename Scanner::match_policy_t::iterator_t, |
| typename Scanner::match_policy_t::factory_t |
| >, |
| typename Scanner::action_policy_t |
| > |
| > ast_scanner; |
| |
| typedef |
| scanner< |
| typename Scanner::iterator_t, |
| scanner_policies< |
| typename Scanner::iteration_policy_t, |
| pt_match_policy< |
| typename Scanner::match_policy_t::iterator_t, |
| typename Scanner::match_policy_t::factory_t |
| >, |
| typename Scanner::action_policy_t |
| > |
| > pt_scanner; |
| |
| typedef rule<ast_scanner> ast_rule; |
| typedef rule<pt_scanner> pt_rule; |
| typedef rule<Scanner> rule_; |
| |
| definition(my_grammar const & /* self */) |
| { |
| start_ = gen_ast_node_d[ ast_rule_ ]; |
| start_ = gen_pt_node_d[ pt_rule_ ]; |
| } |
| |
| rule_ const & start() const |
| { |
| return start_; |
| } |
| |
| rule_ start_; |
| ast_rule ast_rule_; |
| pt_rule pt_rule_; |
| }; |
| }; |
| |
| int main() |
| { |
| const char * begin, * end; |
| |
| pt_parse(begin, end, my_grammar()); |
| ast_parse(begin, end, my_grammar()); |
| } |
