1/*=============================================================================
2 Copyright (c) 2001-2011 Hartmut Kaiser
3 Copyright (c) 2001-2011 Joel de Guzman
4
5 Distributed under the Boost Software License, Version 1.0. (See accompanying
6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7==============================================================================*/
8#if !defined(BOOST_SPIRIT_ANY_IF_NS_NOVEMBER_04_2008_0906PM)
9#define BOOST_SPIRIT_ANY_IF_NS_NOVEMBER_04_2008_0906PM
10
11#if defined(_MSC_VER)
12#pragma once
13#endif
14
15#include <boost/spirit/home/support/algorithm/any_if.hpp>
16#include <boost/spirit/home/support/algorithm/any_ns.hpp>
17
18namespace boost { namespace spirit
19{
20 ///////////////////////////////////////////////////////////////////////////
21 // This is a special version for a binary fusion::any. The predicate
22 // is used to decide whether to advance the second iterator or not.
23 // This is needed for sequences containing components with unused
24 // attributes. The second iterator is advanced only if the attribute
25 // of the corresponding component iterator is not unused.
26 //
27 // This is a non-short circuiting (ns) version of the any_if algorithm.
28 // see any_if.hpp (uses | instead of ||).
29 ///////////////////////////////////////////////////////////////////////////
30 namespace detail
31 {
32 template <
33 typename Pred, typename First1, typename Last1, typename First2
34 , typename Last2, typename F
35 >
36 inline bool
37 any_if_ns(First1 const&, First2 const&, Last1 const&, Last2 const&
38 , F const&, mpl::true_)
39 {
40 return false;
41 }
42
43 template <
44 typename Pred, typename First1, typename Last1, typename First2
45 , typename Last2, typename F
46 >
47 inline bool
48 any_if_ns(First1 const& first1, First2 const& first2
49 , Last1 const& last1, Last2 const& last2, F& f, mpl::false_)
50 {
51 typename result_of::attribute_value<First1, First2, Last2, Pred>::type
52 attribute = spirit::detail::attribute_value<Pred, First1, Last2>(first2);
53
54 // cast bool to int to avoid -Wbitwise-instead-of-logical warning
55 return (0 != (static_cast<int>(f(*first1, attribute)) |
56 detail::any_if_ns<Pred>(
57 fusion::next(first1)
58 , attribute_next<Pred, First1, Last2>(first2)
59 , last1, last2
60 , f
61 , fusion::result_of::equal_to<
62 typename fusion::result_of::next<First1>::type, Last1>())));
63 }
64 }
65
66 template <typename Pred, typename Sequence1, typename Sequence2, typename F>
67 inline bool
68 any_if_ns(Sequence1 const& seq1, Sequence2& seq2, F f, Pred)
69 {
70 return detail::any_if_ns<Pred>(
71 fusion::begin(seq1), fusion::begin(seq2)
72 , fusion::end(seq1), fusion::end(seq2)
73 , f
74 , fusion::result_of::equal_to<
75 typename fusion::result_of::begin<Sequence1>::type
76 , typename fusion::result_of::end<Sequence1>::type>());
77 }
78
79 template <typename Pred, typename Sequence, typename F>
80 inline bool
81 any_if_ns(Sequence const& seq, unused_type const, F f, Pred)
82 {
83 return detail::any_ns(
84 fusion::begin(seq)
85 , fusion::end(seq)
86 , f
87 , fusion::result_of::equal_to<
88 typename fusion::result_of::begin<Sequence>::type
89 , typename fusion::result_of::end<Sequence>::type>());
90 }
91
92}}
93
94#endif
95
96

source code of boost/libs/spirit/include/boost/spirit/home/support/algorithm/any_if_ns.hpp