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/classic/dynamic/impl/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

/*=============================================================================
    Copyright (c) 2003 Hartmut Kaiser
    http://spirit.sourceforge.net/

    Use, modification and distribution is subject to 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)
=============================================================================*/
#ifndef BOOST_SPIRIT_SELECT_IPP
#define BOOST_SPIRIT_SELECT_IPP

#include <boost/spirit/home/classic/core/parser.hpp>
#include <boost/spirit/home/classic/core/composite/composite.hpp>
#include <boost/spirit/home/classic/meta/as_parser.hpp>

///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit {

BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN

///////////////////////////////////////////////////////////////////////////////
namespace impl {

///////////////////////////////////////////////////////////////////////////////
template <typename ParserT>
struct as_embedded_parser : public as_parser<ParserT>
{
    typedef typename as_parser<ParserT>::type::derived_t::embed_t type;
};

///////////////////////////////////////////////////////////////////////////////

// no implementation here to catch unknown BehaviourT template arguments
template <typename ResultT, typename BehaviourT>
struct select_match_gen;

// implementation for the select_default_no_fail behaviour
template <typename ResultT>
struct select_match_gen<ResultT, select_default_no_fail> {

    template <typename ScannerT>
    static ResultT
    do_ (ScannerT const &scan)
    {
        return scan.create_match(0, -1, scan.first, scan.first);
    }
};

// implementation for the select_default_fail behaviour
template <typename ResultT>
struct select_match_gen<ResultT, select_default_fail> {

    template <typename ScannerT>
    static ResultT
    do_ (ScannerT const &scan)
    {
        return scan.no_match();
    }
};

///////////////////////////////////////////////////////////////////////////////
template <int N, typename ResultT, typename TupleT, typename BehaviourT>
struct parse_tuple_element {

    BOOST_STATIC_CONSTANT(int, index = (TupleT::length - N));
    
    template <typename ScannerT>
    static ResultT
    do_(TupleT const &t, ScannerT const &scan)
    {
        typedef typename ::phoenix::tuple_element<index, TupleT>::type parser_t;
        typedef typename ScannerT::iterator_t                       iterator_t;
        typedef typename parser_result<parser_t, ScannerT>::type    result_t;
    
    iterator_t save(scan.first);
    result_t result(t[::phoenix::tuple_index<index>()].parse(scan));

        if (result) {
            return scan.create_match(result.length(), TupleT::length - N, 
                save, scan.first);
        }
        scan.first = save;    // reset the input stream 
        return parse_tuple_element<N-1, ResultT, TupleT, BehaviourT>::
            do_(t, scan);
    }
};

template <typename ResultT, typename TupleT, typename BehaviourT>
struct parse_tuple_element<1, ResultT, TupleT, BehaviourT> {

    BOOST_STATIC_CONSTANT(int, index = (TupleT::length - 1));
    
    template <typename ScannerT>
    static ResultT
    do_(TupleT const &t, ScannerT const &scan)
    {
        typedef typename ::phoenix::tuple_element<index, TupleT>::type  parser_t;
        typedef typename ScannerT::iterator_t                       iterator_t;
        typedef typename parser_result<parser_t, ScannerT>::type    result_t;
        
    iterator_t save(scan.first);
    result_t result(t[::phoenix::tuple_index<index>()].parse(scan));

        if (result) {
            return scan.create_match(result.length(), TupleT::length - 1, 
                save, scan.first);
        }
        scan.first = save;    // reset the input stream 
        return select_match_gen<ResultT, BehaviourT>::do_(scan);
    }
};

///////////////////////////////////////////////////////////////////////////////
}   // namespace impl

BOOST_SPIRIT_CLASSIC_NAMESPACE_END

}}  // namespace boost::spirit

#endif  // BOOST_SPIRIT_SELECT_IPP