53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
// Copyright (c) 2001-2011 Hartmut Kaiser
|
|
//
|
|
// 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_ITERATOR_MULTI_PASS_WRAPPER_JUL_12_2009_0914PM)
|
|
#define BOOST_SPIRIT_ITERATOR_MULTI_PASS_WRAPPER_JUL_12_2009_0914PM
|
|
|
|
#if defined(_MSC_VER)
|
|
#pragma once
|
|
#endif
|
|
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/spirit/home/support/detail/scoped_enum_emulation.hpp>
|
|
|
|
namespace boost { namespace spirit { namespace traits
|
|
{
|
|
// declare special functions allowing to integrate any multi_pass iterator
|
|
// with expectation points
|
|
|
|
// normal iterators require no special handling
|
|
BOOST_SCOPED_ENUM_START(clear_mode)
|
|
{
|
|
clear_if_enabled,
|
|
clear_always
|
|
};
|
|
BOOST_SCOPED_ENUM_END
|
|
|
|
template <typename Iterator>
|
|
void clear_queue(Iterator&
|
|
, BOOST_SCOPED_ENUM(clear_mode) /*mode*/ = clear_mode::clear_if_enabled)
|
|
{}
|
|
|
|
template <typename Iterator>
|
|
void inhibit_clear_queue(Iterator&, bool)
|
|
{}
|
|
|
|
template <typename Iterator>
|
|
bool inhibit_clear_queue(Iterator&)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// Helper template to recognize a multi_pass iterator. This specialization
|
|
// will be instantiated for any non-multi_pass iterator.
|
|
template <typename Iterator>
|
|
struct is_multi_pass : mpl::false_ {};
|
|
|
|
}}}
|
|
|
|
#endif
|
|
|