blob: 7f38db8c1eb2802320fd334a1464a637b4845a6f (
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
71
72
73
74
75
76
|
// Boost.Range library
//
// Copyright Thorsten Ottosen 2003-2004. Use, modification and
// distribution is subject to 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)
//
// For more information, see http://www.boost.org/libs/range/
//
#ifndef BOOST_RANGE_SIZE_HPP
#define BOOST_RANGE_SIZE_HPP
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/range/config.hpp>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/range/size_type.hpp>
#include <boost/range/detail/has_member_size.hpp>
#include <boost/assert.hpp>
#include <boost/cstdint.hpp>
#include <boost/utility.hpp>
namespace boost
{
namespace range_detail
{
template<class SinglePassRange>
inline typename ::boost::enable_if<
has_member_size<SinglePassRange>,
typename range_size<const SinglePassRange>::type
>::type
range_calculate_size(const SinglePassRange& rng)
{
return rng.size();
}
template<class SinglePassRange>
inline typename disable_if<
has_member_size<SinglePassRange>,
typename range_size<const SinglePassRange>::type
>::type
range_calculate_size(const SinglePassRange& rng)
{
return std::distance(boost::begin(rng), boost::end(rng));
}
}
template<class SinglePassRange>
inline typename range_size<const SinglePassRange>::type
size(const SinglePassRange& rng)
{
// Very strange things happen on some compilers that have the range concept
// asserts disabled. This preprocessor condition is clearly redundant on a
// working compiler but is vital for at least some compilers such as clang 4.2
// but only on the Mac!
#if BOOST_RANGE_ENABLE_CONCEPT_ASSERT == 1
BOOST_RANGE_CONCEPT_ASSERT((boost::SinglePassRangeConcept<SinglePassRange>));
#endif
#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
!BOOST_WORKAROUND(__GNUC__, < 3) \
/**/
using namespace range_detail;
#endif
return range_calculate_size(rng);
}
} // namespace 'boost'
#endif
|
