spirit error reporting

parser.cxx

#include "spirit_inc.hxx"
#include <iostream>

namespace x3 = boost::spirit::x3;
using std::cout;
using std::endl;
using std::string;

struct name_class;
struct object_class;

struct objj {};

x3::rule<object_class, objj> const object("object");
x3::rule<name_class, string> const name("name");

auto const name_def = +x3::alnum;

auto const object_def = 
  x3::lit("Object") 
  > name
  >> -(x3::lit("(") > name > *( x3::lit(",") > *x3::alnum ) > x3::lit(")"))
  ;

BOOST_SPIRIT_DEFINE
(
  object = object_def,
  name = name_def
);

struct name_class
{
  template <class Iterator, class Exception, class Context>
  x3::error_handler_result
  on_error(Iterator&, Iterator const&, Exception const&, Context const&)
  {
    cout << "name parsing error" << endl;
    return x3::error_handler_result::fail;
  }
  
};

struct object_class
{
  template <class Iterator, class Exception, class Context>
  x3::error_handler_result
  on_error(Iterator&, Iterator const&, Exception const&, Context const&)
  {
    cout << "object parsing error" << endl;
    return x3::error_handler_result::fail;
  }
};


int main()
{
  string obj{"Object Mu#ffin(a,b,c)"};

  auto it = obj.begin(), end = obj.end();


  boost::spirit::x3::ascii::space_type space;
  bool r = phrase_parse(it, end, object, space);

  if(r && it == end)
  {
    cout << "Success" << endl;
  }

  else
  {
    cout << "Fail" << endl;
  }
}