1// Copyright (c) 2001 Daniel C. Nuffer
2// Copyright (c) 2001-2011 Hartmut Kaiser
3//
4// Distributed under the Boost Software License, Version 1.0. (See accompanying
5// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7#if !defined(BOOST_SPIRIT_ITERATOR_MULTI_PASS_MAR_16_2007_1122AM)
8#define BOOST_SPIRIT_ITERATOR_MULTI_PASS_MAR_16_2007_1122AM
9
10#include <boost/config.hpp>
11#include <boost/spirit/home/support/iterators/multi_pass_fwd.hpp>
12#include <boost/mpl/bool.hpp>
13#include <iterator>
14#include <algorithm>
15
16///////////////////////////////////////////////////////////////////////////////
17namespace boost { namespace spirit { namespace detail
18{
19
20 ///////////////////////////////////////////////////////////////////////////
21 // Default implementations of the different policies to be used with a
22 // multi_pass iterator
23 ///////////////////////////////////////////////////////////////////////////
24 struct default_input_policy
25 {
26 default_input_policy() {}
27
28 template <typename Functor>
29 default_input_policy(Functor const&) {}
30
31 template <typename MultiPass>
32 static void destroy(MultiPass&) {}
33
34 void swap(default_input_policy&) {}
35
36 template <typename MultiPass, typename TokenType>
37 static void advance_input(MultiPass& mp);
38
39 template <typename MultiPass>
40 static typename MultiPass::reference get_input(MultiPass& mp);
41
42 template <typename MultiPass>
43 static bool input_at_eof(MultiPass const& mp);
44
45 template <typename MultiPass, typename TokenType>
46 static bool input_is_valid(MultiPass& mp, TokenType& curtok);
47 };
48
49 struct default_ownership_policy
50 {
51 template <typename MultiPass>
52 static void destroy(MultiPass&) {}
53
54 void swap(default_ownership_policy&) {}
55
56 template <typename MultiPass>
57 static void clone(MultiPass&) {}
58
59 template <typename MultiPass>
60 static bool release(MultiPass& mp);
61
62 template <typename MultiPass>
63 static bool is_unique(MultiPass const& mp);
64 };
65
66 struct default_storage_policy
67 {
68 template <typename MultiPass>
69 static void destroy(MultiPass&) {}
70
71 void swap(default_storage_policy&) {}
72
73 template <typename MultiPass>
74 static typename MultiPass::reference dereference(MultiPass const& mp);
75
76 template <typename MultiPass>
77 static void increment(MultiPass&) {}
78
79 template <typename MultiPass>
80 static void clear_queue(MultiPass&) {}
81
82 template <typename MultiPass>
83 static bool is_eof(MultiPass const& mp);
84
85 template <typename MultiPass>
86 static bool equal_to(MultiPass const& mp, MultiPass const& x);
87
88 template <typename MultiPass>
89 static bool less_than(MultiPass const& mp, MultiPass const& x);
90 };
91
92 struct default_checking_policy
93 {
94 template <typename MultiPass>
95 static void destroy(MultiPass&) {}
96
97 void swap(default_checking_policy&) {}
98
99 template <typename MultiPass>
100 static void docheck(MultiPass const&) {}
101
102 template <typename MultiPass>
103 static void clear_queue(MultiPass&) {}
104 };
105
106}}}
107
108#endif
109