gcc: json_parser_read.hpp:116: warning: unused parameter 'e' [-Wunused-parameter]

[anonymous]

gcc version 4.7.2 (Built by MinGW-builds project) i686-w64-mingw32

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/boost/property_tree/detail/json_parser_read.hpp: In instantiation of 'void boost::property_tree::json_parser::context<Ptree>::a_char::operator()(boost::property_tree::json_parser::context<Ptree>::It, boost::property_tree::json_parser::context<Ptree>::It) const [with Ptree = boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> >; boost::property_tree::json_parser::context<Ptree>::It = gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >]': boost/spirit/home/classic/core/scanner/scanner.hpp:148:13: required from 'static void boost::spirit::classic::attributed_action_policy<boost::spirit::classic::nil_t>::call(const ActorT&, boost::spirit::classic::nil_t, const IteratorT&, const IteratorT&) [with ActorT = boost::property_tree::json_parser::context<boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >::a_char; IteratorT = gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >]' boost/spirit/home/classic/core/scanner/scanner.hpp:163:13: required from 'void boost::spirit::classic::action_policy::do_action(const ActorT&, AttrT&, const IteratorT&, const IteratorT&) const [with ActorT = boost::property_tree::json_parser::context<boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >::a_char; AttrT = boost::spirit::classic::nil_t; IteratorT = gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >]' boost/spirit/home/classic/core/composite/actions.hpp:116:17: required from 'typename boost::spirit::classic::parser_result<boost::spirit::classic::action<ParserT, ActionT>, ScannerT>::type boost::spirit::classic::action<ParserT, ActionT>::parse(const ScannerT&) const [with ScannerT = boost::spirit::classic::scanner<gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >, boost::spirit::classic::scanner_policies<boost::spirit::classic::no_skipper_iteration_policy<boost::spirit::classic::skip_parser_iteration_policy<boost::spirit::classic::alternative<boost::spirit::classic::alternative<boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::alternative<boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::strlit<const char*>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::iteration_policy> >, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy> >; ParserT = boost::spirit::classic::difference<boost::spirit::classic::difference<boost::spirit::classic::anychar_parser, boost::spirit::classic::strlit<const char*> >, boost::spirit::classic::strlit<const char*> >; ActionT = boost::property_tree::json_parser::context<boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >::a_char; typename boost::spirit::classic::parser_result<boost::spirit::classic::action<ParserT, ActionT>, ScannerT>::type = boost::spirit::classic::match<boost::spirit::classic::nil_t>]' boost/spirit/home/classic/core/composite/alternative.hpp:67:59: required from 'typename boost::spirit::classic::parser_result<boost::spirit::classic::alternative<A, B>, ScannerT>::type boost::spirit::classic::alternative<A, B>::parse(const ScannerT&) const [with ScannerT = boost::spirit::classic::scanner<gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >, boost::spirit::classic::scanner_policies<boost::spirit::classic::no_skipper_iteration_policy<boost::spirit::classic::skip_parser_iteration_policy<boost::spirit::classic::alternative<boost::spirit::classic::alternative<boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::alternative<boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::strlit<const char*>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::iteration_policy> >, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy> >; A = boost::spirit::classic::action<boost::spirit::classic::difference<boost::spirit::classic::difference<boost::spirit::classic::anychar_parser, boost::spirit::classic::strlit<const char*> >, boost::spirit::classic::strlit<const char*> >, boost::property_tree::json_parser::context<boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >::a_char>; B = boost::spirit::classic::sequence<boost::spirit::classic::chlit<char>, boost::spirit::classic::assertive_parser<std::basic_string<char>, boost::spirit::classic::rule<boost::spirit::classic::scanner<__gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, boost::spirit::classic::scanner_policies<boost::spirit::classic::no_skipper_iteration_policy<boost::spirit::classic::skip_parser_iteration_policy<boost::spirit::classic::alternative<boost::spirit::classic::alternative<boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::alternative<boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::strlit<const char*>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::iteration_policy> >, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy> >, boost::spirit::classic::nil_t, boost::spirit::classic::nil_t> > >; typename boost::spirit::classic::parser_result<boost::spirit::classic::alternative<A, B>, ScannerT>::type = boost::spirit::classic::match<boost::spirit::classic::nil_t>]' boost/spirit/home/classic/core/non_terminal/impl/rule.ipp:240:36: required from 'typename boost::spirit::classic::match_result<ScannerT, ContextResultT>::type boost::spirit::classic::impl::concrete_parser<ParserT, ScannerT, AttrT>::do_parse_virtual(const ScannerT&) const [with ParserT = boost::spirit::classic::alternative<boost::spirit::classic::action<boost::spirit::classic::difference<boost::spirit::classic::difference<boost::spirit::classic::anychar_parser, boost::spirit::classic::strlit<const char*> >, boost::spirit::classic::strlit<const char*> >, boost::property_tree::json_parser::context<boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >::a_char>, boost::spirit::classic::sequence<boost::spirit::classic::chlit<char>, boost::spirit::classic::assertive_parser<std::basic_string<char>, boost::spirit::classic::rule<boost::spirit::classic::scanner<__gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, boost::spirit::classic::scanner_policies<boost::spirit::classic::no_skipper_iteration_policy<boost::spirit::classic::skip_parser_iteration_policy<boost::spirit::classic::alternative<boost::spirit::classic::alternative<boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::alternative<boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::strlit<const char*>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::iteration_policy> >, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy> >, boost::spirit::classic::nil_t, boost::spirit::classic::nil_t> > > >; ScannerT = boost::spirit::classic::scanner<gnu_cxx::normal_iterator<char*, std::vector<char, std::allocator<char> > >, boost::spirit::classic::scanner_policies<boost::spirit::classic::no_skipper_iteration_policy<boost::spirit::classic::skip_parser_iteration_policy<boost::spirit::classic::alternative<boost::spirit::classic::alternative<boost::spirit::classic::space_parser, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::alternative<boost::spirit::classic::eol_parser, boost::spirit::classic::end_parser>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::confix_parser<boost::spirit::classic::strlit<const char*>, boost::spirit::classic::kleene_star<boost::spirit::classic::anychar_parser>, boost::spirit::classic::strlit<const char*>, boost::spirit::classic::unary_parser_category, boost::spirit::classic::non_nested, boost::spirit::classic::is_lexeme> >, boost::spirit::classic::iteration_policy> >, boost::spirit::classic::match_policy, boost::spirit::classic::action_policy> >; AttrT = boost::spirit::classic::nil_t; typename boost::spirit::classic::match_result<ScannerT, ContextResultT>::type = boost::spirit::classic::match<boost::spirit::classic::nil_t>]' main.cpp:14:1: required from here boost/property_tree/detail/json_parser_read.hpp:116:18: warning: unused parameter 'e' [-Wunused-parameter]

116: void operator()(It b, It e) const