Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/include/boost/spirit/home/x3/auxiliary/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

/*=============================================================================
    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_EPS_MARCH_23_2007_0454PM)
#define BOOST_SPIRIT_X3_EPS_MARCH_23_2007_0454PM

#include <boost/spirit/home/x3/core/skip_over.hpp>
#include <boost/spirit/home/x3/core/parser.hpp>
#include <boost/spirit/home/x3/support/unused.hpp>

namespace boost { namespace spirit { namespace x3
{
    struct rule_context_tag;

    struct semantic_predicate : parser<semantic_predicate>
    {
        typedef unused_type attribute_type;
        static bool const has_attribute = false;

        semantic_predicate(bool predicate)
          : predicate(predicate) {}

        template <typename Iterator, typename Context, typename Attribute>
        bool parse(Iterator& first, Iterator const& last
          , Context const& context, unused_type, Attribute&) const
        {
            x3::skip_over(first, last, context);
            return predicate;
        }

        bool predicate;
    };

    template <typename F>
    struct lazy_semantic_predicate : parser<lazy_semantic_predicate<F>>
    {
        typedef unused_type attribute_type;
        static bool const has_attribute = false;

        lazy_semantic_predicate(F f)
          : f(f) {}

        template <typename Iterator, typename Context, typename Attribute>
        bool parse(Iterator& first, Iterator const& last
          , Context const& context, unused_type, Attribute& /* attr */) const
        {
            x3::skip_over(first, last, context);
            return f(x3::get<rule_context_tag>(context));
        }

        F f;
    };

    struct eps_parser : parser<eps_parser>
    {
        typedef unused_type attribute_type;
        static bool const has_attribute = false;

        template <typename Iterator, typename Context
          , typename RuleContext, typename Attribute>
        bool parse(Iterator& first, Iterator const& last
          , Context const& context, RuleContext&, Attribute&) const
        {
            x3::skip_over(first, last, context);
            return true;
        }

        inline semantic_predicate operator()(bool predicate) const
        {
            return { predicate };
        }

        template <typename F>
        lazy_semantic_predicate<F> operator()(F f) const
        {
            return { f };
        }
    };

    auto const eps = eps_parser{};
}}}

#endif