| // Copyright (c) 2001, Daniel C. Nuffer |
| // Copyright (c) 2001-2008, Hartmut Kaiser |
| // http://spirit.sourceforge.net/ |
| // |
| // 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_LOOK_AHEAD_MAR_16_2007_1253PM) |
| #define BOOST_SPIRIT_ITERATOR_LOOK_AHEAD_MAR_16_2007_1253PM |
| |
| #include <boost/spirit/home/support/iterators/detail/input_iterator_policy.hpp> |
| #include <boost/spirit/home/support/iterators/detail/first_owner_policy.hpp> |
| #include <boost/spirit/home/support/iterators/detail/no_check_policy.hpp> |
| #include <boost/spirit/home/support/iterators/detail/fixed_size_queue_policy.hpp> |
| #include <boost/spirit/home/support/iterators/multi_pass.hpp> |
| |
| namespace boost { namespace spirit |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // this could be a template typedef, since such a thing doesn't |
| // exist in C++, we'll use inheritance to accomplish the same thing. |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename T, std::size_t N> |
| class look_ahead : |
| public multi_pass< |
| T, |
| multi_pass_policies::input_iterator, |
| multi_pass_policies::first_owner, |
| multi_pass_policies::no_check, |
| multi_pass_policies::fixed_size_queue<N> |
| > |
| { |
| private: |
| typedef multi_pass< |
| T, |
| multi_pass_policies::input_iterator, |
| multi_pass_policies::first_owner, |
| multi_pass_policies::no_check, |
| multi_pass_policies::fixed_size_queue<N> > |
| base_type; |
| |
| public: |
| look_ahead() |
| : base_type() {} |
| |
| explicit look_ahead(T x) |
| : base_type(x) {} |
| |
| look_ahead(look_ahead const& x) |
| : base_type(x) {} |
| |
| #if BOOST_WORKAROUND(__GLIBCPP__, == 20020514) |
| look_ahead(int) // workaround for a bug in the library |
| : base_type() {} // shipped with gcc 3.1 |
| #endif // BOOST_WORKAROUND(__GLIBCPP__, == 20020514) |
| |
| // default generated operators destructor and assignment operator are ok. |
| }; |
| |
| }} |
| |
| #endif |