boost-spirit-qi

问题 I am playing with boost.spirit library and I cannot manage to report a simple error message from my semantic action. // supported parameter types (int or quoted strings) parameter = bsqi::int_ | bsqi::lexeme[L'"' > *(bsqi_coding::char_ - L'"') > L'"']; parameter.name("parameter"); // comma separator list of parameters (or no parameters) parameters = -(parameter % L','); parameters.name("parameters"); // action with parameters action = (Actions > L'(' > parameters > L')')[bsqi::_pass = boost:

问题 I am playing with boost.spirit library and I cannot manage to report a simple error message from my semantic action. // supported parameter types (int or quoted strings) parameter = bsqi::int_ | bsqi::lexeme[L'"' > *(bsqi_coding::char_ - L'"') > L'"']; parameter.name("parameter"); // comma separator list of parameters (or no parameters) parameters = -(parameter % L','); parameters.name("parameters"); // action with parameters action = (Actions > L'(' > parameters > L')')[bsqi::_pass = boost:

问题 This does not compile (code below). There was another question here with the same error. But I don't understand the answer. I already tried inserting qi::eps in places -- but without success. I also tried already adding meta functions (boost::spirit::raits::is_container) for the types used -- but this also does not help. I also tried using the same variant containing all types I need to use everywhere. Same problem. Has anybody gotten this working for a lexer returning something else than

问题 This does not compile (code below). There was another question here with the same error. But I don't understand the answer. I already tried inserting qi::eps in places -- but without success. I also tried already adding meta functions (boost::spirit::raits::is_container) for the types used -- but this also does not help. I also tried using the same variant containing all types I need to use everywhere. Same problem. Has anybody gotten this working for a lexer returning something else than

问题 I'm trying to extend the calculator example so that instead of parsing and evaluating an algebraic expression, the parser will determine if an algebraic statement is true or not. By this I mean statements like 1 + 5 * 5 - 10 = 19 - 3 (desired parser result is true ) and 3 - 1 = 9 (desired parser result is false ). I've got to admit I'm new to boost::spirit and it's all kind of overwhelming at the moment. However, I do feel I understand the calculator example good enough to at least make some

问题 If there's a structure: struct record { std::string type; std::string delimiter; uint32_t length; std::string name; record() { type = ""; delimiter = ""; length = 0; name = ""; } }; Which is adapted using boost::fusion, and the below grammar: struct record_parser : qi::grammar<Iterator, record(), ascii::space_type> { record_parser() : record_parser::base_type(start) { using qi::lit; using qi::uint_; using qi::lexeme; using ascii::char_; using ascii::blank; using ascii::string; using qi::attr;

问题 I have a case where I'd like to filter the value that comes up as a synthesized attribute inside of a rule through a std::map. The map is pre-generated and will not change during the parsing. The nature of the map and the real parser means that the lookup should never fail (although the actual number of elements may be quite large) The usual approach perfectly suited to this problem (use a symbol table) isn't appropriate for the real case. In the real problem, the lookup is conditional based

问题 I have a case where I'd like to filter the value that comes up as a synthesized attribute inside of a rule through a std::map. The map is pre-generated and will not change during the parsing. The nature of the map and the real parser means that the lookup should never fail (although the actual number of elements may be quite large) The usual approach perfectly suited to this problem (use a symbol table) isn't appropriate for the real case. In the real problem, the lookup is conditional based

问题 I have two problems with the following SQL grammar: #define BOOST_SPIRIT_QI_DEBUG #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/lex_lexertl.hpp> #include <boost/spirit/include/phoenix.hpp> #include <boost/spirit/include/karma.hpp> #include <boost/fusion/include/adapt_struct.hpp> #include <boost/fusion/include/std_pair.hpp> #include <boost/algorithm/string.hpp> #include <boost/shared_ptr.hpp> #include <boost/make_shared.hpp> #include <boost/lexical_cast.hpp> #include

问题 I have two problems with the following SQL grammar: #define BOOST_SPIRIT_QI_DEBUG #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/lex_lexertl.hpp> #include <boost/spirit/include/phoenix.hpp> #include <boost/spirit/include/karma.hpp> #include <boost/fusion/include/adapt_struct.hpp> #include <boost/fusion/include/std_pair.hpp> #include <boost/algorithm/string.hpp> #include <boost/shared_ptr.hpp> #include <boost/make_shared.hpp> #include <boost/lexical_cast.hpp> #include