LeechCraft  0.6.70-15082-g543737046d
Modular cross-platform feature rich live environment.
views.h
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1 /**********************************************************************
2  * LeechCraft - modular cross-platform feature rich internet client.
3  * Copyright (C) 2006-2014 Georg Rudoy
4  *
5  * Distributed under the Boost Software License, Version 1.0.
6  * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
7  **********************************************************************/
8 
9 #pragma once
10 
11 #include <iterator>
12 #include <boost/iterator/zip_iterator.hpp>
13 #include <boost/range.hpp>
14 
15 namespace LC
16 {
17 namespace Util
18 {
19 namespace Views
20 {
21  namespace detail
22  {
23  template<template<typename, typename> class PairType, typename FirstIt, typename SecondIt>
24  using ValueType_t = PairType<typename std::iterator_traits<FirstIt>::value_type, typename std::iterator_traits<SecondIt>::value_type>;
25 
26  template<template<typename, typename> class PairType, typename FirstIt, typename SecondIt>
27  class PairIterator : public std::iterator<std::forward_iterator_tag, ValueType_t<PairType, FirstIt, SecondIt>>
28  {
29  bool IsSentinel_;
30 
31  FirstIt First_;
32  FirstIt FirstEnd_;
33  SecondIt Second_;
34  SecondIt SecondEnd_;
35  public:
36  PairIterator ()
37  : IsSentinel_ { true }
38  {
39  }
40 
41  PairIterator (const FirstIt& first, const FirstIt& firstEnd,
42  const SecondIt& second, const SecondIt& secondEnd)
43  : IsSentinel_ { false }
44  , First_ { first }
45  , FirstEnd_ { firstEnd }
46  , Second_ { second }
47  , SecondEnd_ { secondEnd }
48  {
49  }
50 
51  bool operator== (const PairIterator& other) const
52  {
53  return (IsSentinel () && other.IsSentinel ()) ||
54  (First_ == other.First_ && Second_ == other.Second_);
55  }
56 
57  bool operator!= (const PairIterator& other) const
58  {
59  return !(*this == other);
60  }
61 
62  bool IsSentinel () const
63  {
64  return IsSentinel_ || First_ == FirstEnd_ || Second_ == SecondEnd_;
65  }
66 
68  {
69  ++First_;
70  ++Second_;
71  return *this;
72  }
73 
75  {
76  auto it = *this;
77 
78  ++First_;
79  ++Second_;
80 
81  return it;
82  }
83 
84  PairType<typename std::iterator_traits<FirstIt>::value_type, typename std::iterator_traits<SecondIt>::value_type> operator* () const
85  {
86  return { *First_, *Second_ };
87  }
88  };
89 
90  template<typename I1, typename I2, template<typename, typename> class PairType>
91  class ZipRange : public boost::iterator_range<PairIterator<PairType, I1, I2>>
92  {
93  using IteratorType_t = PairIterator<PairType, I1, I2>;
94  public:
95  template<typename C1, typename C2>
96  ZipRange (C1&& c1, C2&& c2)
98  {
99  IteratorType_t { c1.begin (), c1.end (), c2.begin (), c2.end () },
100  IteratorType_t {}
101  }
102  {
103  }
104  };
105  }
106 
107  template<template<typename, typename> class PairType = QPair, typename C1, typename C2>
109  {
110  return { c1, c2 };
111  }
112 }
113 }
114 }
LC::Util::Views::detail::ZipRange::ZipRange
ZipRange(C1 &&c1, C2 &&c2)
Definition: views.h:120
LC::Util::Views::detail::PairIterator::PairIterator
PairIterator()
Definition: views.h:60
LC::Util::Views::detail::PairIterator
Definition: views.h:51
LC::Util::Views::Zip
detail::ZipRange< typename C1::const_iterator, typename C2::const_iterator, PairType > Zip(const C1 &c1, const C2 &c2)
Definition: views.h:126
LC::Util::Views::detail::ZipRange
Definition: views.h:115
LC::Util::Views::detail::PairIterator::operator*
PairType< typename std::iterator_traits< FirstIt >::value_type, typename std::iterator_traits< SecondIt >::value_type > operator*() const
Definition: views.h:108
LC::Util::Views::detail::PairIterator::IsSentinel
bool IsSentinel() const
Definition: views.h:86
LC
Definition: constants.h:14
boost::iterator_range
Definition: prelude.h:26
LC::Util::Views::detail::ValueType_t
PairType< typename std::iterator_traits< FirstIt >::value_type, typename std::iterator_traits< SecondIt >::value_type > ValueType_t
Definition: views.h:48
LC::Util::Views::detail::PairIterator::operator==
bool operator==(const PairIterator &other) const
Definition: views.h:75
LC::Util::Views::detail::PairIterator::operator!=
bool operator!=(const PairIterator &other) const
Definition: views.h:81
LC::Util::Views::detail::PairIterator::operator++
PairIterator & operator++()
Definition: views.h:91