blob: dd0922bb2b6e788046eff44ef26453c3c15d50ca (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2014, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_DUPLICATES_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_DUPLICATES_HPP
#include <boost/range.hpp>
#include <boost/geometry/core/closure.hpp>
#include <boost/geometry/policies/compare.hpp>
#include <boost/geometry/views/closeable_view.hpp>
namespace boost { namespace geometry
{
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace is_valid
{
template <typename Range, closure_selector Closure>
struct has_duplicates
{
static inline bool apply(Range const& range)
{
typedef typename closeable_view<Range const, Closure>::type view_type;
typedef typename boost::range_iterator<view_type const>::type iterator;
view_type view(range);
if ( boost::size(view) < 2 )
{
return false;
}
geometry::equal_to<typename boost::range_value<Range>::type> equal;
iterator it = boost::begin(view);
iterator next = ++boost::begin(view);
for (; next != boost::end(view); ++it, ++next)
{
if ( equal(*it, *next) )
{
return true;
}
}
return false;
}
};
}} // namespace detail::is_valid
#endif // DOXYGEN_NO_DETAIL
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_HAS_DUPLICATES_HPP
|
