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1 // (C) Copyright Jeremy Siek 2004
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2 // Distributed under the Boost Software License, Version 1.0. (See
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3 // accompanying file LICENSE_1_0.txt or copy at
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4 // http://www.boost.org/LICENSE_1_0.txt)
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5
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6 #ifndef BOOST_QUEUE_HPP
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7 #define BOOST_QUEUE_HPP
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8
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9 #include <deque>
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10 #include <algorithm>
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11
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12 namespace boost {
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13
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14 template <class _Tp,
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15 class _Sequence = std::deque<_Tp> >
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16 class queue;
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17
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18 template <class _Tp, class _Seq>
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19 inline bool operator==(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
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20
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21 template <class _Tp, class _Seq>
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22 inline bool operator<(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
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23
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24
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25 template <class _Tp, class _Sequence>
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26 class queue {
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27
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28 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
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29 template <class _Tp1, class _Seq1>
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30 friend bool operator== (const queue<_Tp1, _Seq1>&,
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31 const queue<_Tp1, _Seq1>&);
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32 template <class _Tp1, class _Seq1>
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33 friend bool operator< (const queue<_Tp1, _Seq1>&,
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34 const queue<_Tp1, _Seq1>&);
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35 #endif
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36 public:
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37 typedef typename _Sequence::value_type value_type;
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38 typedef typename _Sequence::size_type size_type;
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39 typedef _Sequence container_type;
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40
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41 typedef typename _Sequence::reference reference;
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42 typedef typename _Sequence::const_reference const_reference;
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43 #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
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44 protected:
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45 #endif
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46 _Sequence c;
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47 public:
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48 queue() : c() {}
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49 explicit queue(const _Sequence& __c) : c(__c) {}
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50
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51 bool empty() const { return c.empty(); }
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52 size_type size() const { return c.size(); }
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53 reference front() { return c.front(); }
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54 const_reference front() const { return c.front(); }
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55 reference top() { return c.front(); }
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56 const_reference top() const { return c.front(); }
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57 reference back() { return c.back(); }
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58 const_reference back() const { return c.back(); }
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59 void push(const value_type& __x) { c.push_back(__x); }
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60 void pop() { c.pop_front(); }
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61
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62 void swap(queue& other)
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63 {
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64 using std::swap;
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65 swap(c, other.c);
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66 }
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67 };
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68
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69 template <class _Tp, class _Sequence>
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70 bool
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71 operator==(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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72 {
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73 return __x.c == __y.c;
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74 }
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75
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76 template <class _Tp, class _Sequence>
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77 bool
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78 operator<(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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79 {
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80 return __x.c < __y.c;
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81 }
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82
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83 template <class _Tp, class _Sequence>
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84 bool
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85 operator!=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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86 {
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87 return !(__x == __y);
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88 }
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89
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90 template <class _Tp, class _Sequence>
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91 bool
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92 operator>(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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93 {
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94 return __y < __x;
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95 }
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96
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97 template <class _Tp, class _Sequence>
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98 bool
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99 operator<=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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100 {
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101 return !(__y < __x);
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102 }
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103
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104 template <class _Tp, class _Sequence>
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105 bool
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106 operator>=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
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107 {
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108 return !(__x < __y);
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109 }
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110
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111 template <class _Tp, class _Sequence>
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112 inline void
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113 swap(queue<_Tp, _Sequence>& __x, queue<_Tp, _Sequence>& __y)
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114 { __x.swap(__y); }
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115
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116 } /* namespace boost */
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117
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118 #endif /* BOOST_QUEUE_HPP */
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