FM / auxiliary

/usr/include/boost/spirit/home/x3/auxiliary/

/usr/include/boost/spirit/home/x3/auxiliary

Name	Size	Mode	Actions
any_parser.hpp	4852	0644	edit dl rm
attr.hpp	4335	0644	edit dl rm
eoi.hpp	1392	0644	edit dl rm
eol.hpp	1779	0644	edit dl rm
eps.hpp	2701	0644	edit dl rm
guard.hpp	2367	0644	edit dl rm

Edit: /usr/include/boost/spirit/home/x3/auxiliary/guard.hpp (2367B)

/*=============================================================================
    Copyright (c) 2001-2014 Joel de Guzman

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)
=============================================================================*/
#if !defined(BOOST_SPIRIT_X3_GUARD_FERBRUARY_02_2013_0649PM)
#define BOOST_SPIRIT_X3_GUARD_FERBRUARY_02_2013_0649PM

#include <boost/spirit/home/x3/support/context.hpp>
#include <boost/spirit/home/x3/directive/expect.hpp>

namespace boost { namespace spirit { namespace x3
{
    enum class error_handler_result
    {
        fail
      , retry
      , accept
      , rethrow
    };

template <typename Subject, typename Handler>
    struct guard : unary_parser<Subject, guard<Subject, Handler>>
    {
        typedef unary_parser<Subject, guard<Subject, Handler>> base_type;
        static bool const is_pass_through_unary = true;

constexpr guard(Subject const& subject, Handler handler)
          : base_type(subject), handler(handler) {}

template <typename Iterator, typename Context
          , typename RuleContext, typename Attribute>
        bool parse(Iterator& first, Iterator const& last
          , Context const& context, RuleContext& rcontext, Attribute& attr) const
        {
            for (;;)
            {
                try
                {
                    Iterator i = first;
                    bool r = this->subject.parse(i, last, context, rcontext, attr);
                    if (r)
                        first = i;
                    return r;
                }
                catch (expectation_failure<Iterator> const& x)
                {
                    switch (handler(first, last, x, context))
                    {
                        case error_handler_result::fail:
                            return false;
                        case error_handler_result::retry:
                            continue;
                        case error_handler_result::accept:
                            return true;
                        case error_handler_result::rethrow:
                            throw;
                    }
                }
            }
            return false;
        }

Handler handler;
    };
}}}

#endif

/*============================================================================= Copyright (c) 2001-2014 Joel de Guzman 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) =============================================================================*/ #if !defined(BOOST_SPIRIT_X3_GUARD_FERBRUARY_02_2013_0649PM) #define BOOST_SPIRIT_X3_GUARD_FERBRUARY_02_2013_0649PM #include #include namespace boost { namespace spirit { namespace x3 { enum class error_handler_result { fail , retry , accept , rethrow }; template struct guard : unary_parser> { typedef unary_parser> base_type; static bool const is_pass_through_unary = true; constexpr guard(Subject const& subject, Handler handler) : base_type(subject), handler(handler) {} template bool parse(Iterator& first, Iterator const& last , Context const& context, RuleContext& rcontext, Attribute& attr) const { for (;;) { try { Iterator i = first; bool r = this->subject.parse(i, last, context, rcontext, attr); if (r) first = i; return r; } catch (expectation_failure const& x) { switch (handler(first, last, x, context)) { case error_handler_result::fail: return false; case error_handler_result::retry: continue; case error_handler_result::accept: return true; case error_handler_result::rethrow: throw; } } } return false; } Handler handler; }; }}} #endif