// Copyright (c) 2001, Daniel C. Nuffer | |
// Copyright (c) 2001-2011 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/first_owner_policy.hpp> | |
#include <boost/spirit/home/support/iterators/detail/no_check_policy.hpp> | |
#include <boost/spirit/home/support/iterators/detail/input_iterator_policy.hpp> | |
#include <boost/spirit/home/support/iterators/detail/fixed_size_queue_policy.hpp> | |
#include <boost/spirit/home/support/iterators/detail/combine_policies.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 | |
, iterator_policies::default_policy< | |
iterator_policies::first_owner | |
, iterator_policies::no_check | |
, iterator_policies::input_iterator | |
, iterator_policies::fixed_size_queue<N> > | |
> | |
{ | |
private: | |
typedef multi_pass<T | |
, iterator_policies::default_policy< | |
iterator_policies::first_owner | |
, iterator_policies::no_check | |
, iterator_policies::input_iterator | |
, iterator_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) | |
look_ahead operator= (base_type const& rhs) | |
{ | |
this->base_type::operator=(rhs); | |
return *this; | |
} | |
// default generated operators destructor and assignment operator are ok. | |
}; | |
}} | |
#endif |