| // Copyright (c) 2001-2010 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 |
| |