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  1. //#include <boost/config/warning_disable.hpp>
  2. //#define BOOST_SPIRIT_DEBUG_PRINT_SOME 80
  3. //#define BOOST_SPIRIT_DEBUG // before including Spirit
  4. #include <boost/spirit/include/lex_lexertl.hpp>
  5. #include <boost/spirit/include/qi.hpp>
  6. #include <fstream>
  7. #ifdef MEMORY_MAPPED
  8. #   include <boost/iostreams/device/mapped_file.hpp>
  9. #endif
  10. //#include <boost/spirit/include/lex_generate_static_lexertl.hpp>
  11.  
  12. namespace /*anon*/
  13. {
  14.     namespace phx=boost::phoenix;
  15.     namespace qi =boost::spirit::qi;
  16.     namespace lex=boost::spirit::lex;
  17.  
  18.     static bool undoublequote(std::string& val)
  19.     {
  20.         auto outidx = 0;
  21.         for(auto in = val.begin(); in!=val.end(); ++in) {
  22.             switch(*in) {
  23.                 case '"': 
  24.                     if (++in == val.end()) { // eat the escape
  25.                         // end of input reached
  26.                         val.resize(outidx); // resize to effective chars
  27.                         return true;
  28.                     }
  29.                     // fall through
  30.                 default:
  31.                     val[outidx++] = *in; // append the character
  32.             }
  33.         }
  34.  
  35.         return false; // not ended with double quote as expected
  36.     }
  37.  
  38.     template <typename Lexer>
  39.         struct mylexer_t : lex::lexer<Lexer>
  40.     {
  41.         struct undoublequote_lex_type {
  42.             template <typename, typename, typename, typename> struct result { typedef void type; };
  43.  
  44.             template <typename It, typename IdType, typename pass_flag, typename Ctx>
  45.                 void operator()(It& f, It& l, pass_flag& pass, IdType& id, Ctx& ctx) const {
  46.                     std::string raw(f,l);
  47.                     if (undoublequote(raw))
  48.                         ctx.set_value(raw);
  49.                     else
  50.                         pass = lex::pass_flags::pass_fail;
  51.                 }
  52.         } undoublequote_lex;
  53.  
  54.         mylexer_t()
  55.         {
  56.             string_quote_double = "\\\"([^\"]|\\\"\\\")*\\\"";
  57.  
  58.             const static undoublequote_lex_type undoublequote_lex;
  59.             this->self("INITIAL")
  60.                 = string_quote_double [ undoublequote_lex ]
  61.                 | lex::token_def<>("[ \t\r\n]") [ lex::_pass = lex::pass_flags::pass_ignore ]
  62.                 ;
  63.         }
  64.  
  65.         lex::token_def<std::string> string_quote_double;
  66.     };
  67.  
  68.     template <typename Iterator> struct mygrammar_t
  69.         : public qi::grammar<Iterator, std::vector<std::string>()>
  70.     {
  71.         typedef mygrammar_t<Iterator> This;
  72.  
  73.         template <typename TokenDef>
  74.             mygrammar_t(TokenDef const& tok) : mygrammar_t::base_type(start)
  75.         {
  76.             using namespace qi;
  77.  
  78.             string_quote_double = tok.string_quote_double;
  79.             start = *string_quote_double;
  80.  
  81.             BOOST_SPIRIT_DEBUG_NODES((start)(string_quote_double));
  82.         }
  83.  
  84.       private:
  85.         qi::rule<Iterator, std::vector<std::string>()> start;
  86.         qi::rule<Iterator, std::string()> string_quote_double;
  87.     };
  88. }
  89.  
  90. std::vector<std::string> do_test_parse(const std::string& v)
  91. {
  92.     char const *first = &v[0];
  93.     char const *last = first+v.size();
  94.  
  95.     typedef lex::lexertl::token<char const*, boost::mpl::vector<char, std::string> > token_type;
  96.     typedef lex::lexertl::actor_lexer<token_type> lexer_type;
  97.  
  98.     typedef mylexer_t<lexer_type>::iterator_type iterator_type;
  99.     const static mylexer_t<lexer_type> mylexer;
  100.     const static mygrammar_t<iterator_type> parser(mylexer);
  101.  
  102.     auto iter = mylexer.begin(first, last);
  103.     auto end = mylexer.end();
  104.  
  105.     std::vector<std::string> data;
  106.     bool r = qi::parse(iter, end, parser, data);
  107.  
  108.     r = r && (iter == end);
  109.  
  110.     if (!r)
  111.         std::cerr << "parsing (" << iter->state() << ") failed at: '" << std::string(first, last) << "'\n";
  112.  
  113.     return data;
  114. }
  115.  
  116. int main(int argc, const char *argv[])
  117. {
  118.     for (auto&& s : do_test_parse( "\"bla\"\"blo\""))
  119.         std::cout << s << std::endl;
  120. }
  121.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:4:48: fatal error: boost/spirit/include/lex_lexertl.hpp: No such file or directory
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/BGXH9W
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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