-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathreverse_iterator.hpp
224 lines (210 loc) · 5.14 KB
/
reverse_iterator.hpp
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
#pragma once
#include <iostream>
#include "iterator_traits.hpp"
namespace ft
{
//!#Reverse Iterator
//?https://www.cplusplus.com/reference/iterator/reverse_iterator/
template <typename iterator>
class reverse_iterator
{
public:
typedef iterator iterator_type;
typedef typename ft::iterator_traits<iterator>::pointer pointer;
typedef typename ft::iterator_traits<iterator>::reference reference;
typedef typename ft::iterator_traits<iterator>::value_type value_type;
typedef typename ft::iterator_traits<iterator>::iterator_category iterator_category;
typedef ptrdiff_t difference_type;
explicit reverse_iterator(iterator x = NULL)
{
it = x;
}
template <class Iter>
reverse_iterator (reverse_iterator<Iter> const &rev_it) : it(rev_it.base())
{
}
iterator base() const
{
return (it);
}
reference operator*() const
{
iterator it2(it);
--it2;
return (*it2);
}
template <class Iter>
reverse_iterator& operator=(reverse_iterator<Iter> const &rev_it)
{
this->it = rev_it.base();
return (*this);
}
pointer operator->() const
{
//iterator it2(it);
//--it2;
return (&(operator*()));
//return &(*(it2));
}
reverse_iterator& operator++()
{
--it;
return (*this);
}
reverse_iterator operator++(int)
{
reverse_iterator abc(*this);
this->it--;
return abc;
}
reverse_iterator& operator--() { it++; return *this;}
reverse_iterator operator--(int)
{
reverse_iterator abc = *this;
this->it++;
return abc;
}
reverse_iterator &operator-=(const int &a)
{
this->it = this->it + a;
return (*this);
}
reverse_iterator &operator+= (difference_type n)
{
this->it = this->it - n;
return (*this);
}
reverse_iterator operator+ (difference_type n) const
{
reverse_iterator<iterator> it(*this);
this->it = this->it - n;
return (it);
}
reverse_iterator operator-(difference_type n) const
{
reverse_iterator<iterator> it(*this);
for (int i = 0;i < n; i++)
it--;
return (it);
}
reference operator[](const int &a)
{
iterator it2(it);
it2--;
return (it2[a]);
}
const iterator& operator[](const int &a) const
{
return it[a];
}
//template<typename S>
//bool operator==(const reverse_iterator<S>& a)
//{
// if (this->it.base() == a.base())
// return (true);
// return (false);
//}
//template<typename S>
//bool operator!=(const reverse_iterator<S>& a)
//{
// if (this->it != a)
// return (true);
// return (false);
//}
//template<typename S>
//bool operator>(const reverse_iterator<S>& a)
//{
// if (this->it < a)
// return (true);
// return (false);
//}
//template<typename S>
//bool operator<(const reverse_iterator<S>& a)
//{
// if (this->it > a)
// return (true);
// return (false);
//}
//template<typename S>
//bool operator<=(const reverse_iterator<S>& a)
//{
// if (this->it >= a)
// return (true);
// return (false);
//}
//template<typename S>
//bool operator>=(const reverse_iterator<S>& a)
//{
// if (this->it <= a)
// return (true);
// return (false);
//}
private:
iterator it;
};
template <typename T>
reverse_iterator<T> operator-(const reverse_iterator<T> &it, const int &a)
{
reverse_iterator<T> abc(it);
for (int i = 0; i < a; i++)
abc--;
return (abc);
}
template <typename T>
reverse_iterator<T> operator+(const reverse_iterator<T> &it, const int &a)
{
reverse_iterator<T> abc(it);
for (int i = 0; i < a; i++)
abc++;
return (abc);
}
template <typename T>
reverse_iterator<T> operator+(const int &a, const reverse_iterator<T> &it)
{
reverse_iterator<T> abc(it);
for (int i = 0; i < a; i++)
abc++;
return (abc);
}
template <class InputIterator, class Distance>
void advance (InputIterator& it, Distance n)
{
for (Distance i = 0; i < n; i++)
it++;
}
template <class it1, class it2>
bool operator==(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit1.base() == myit2.base());
}
template <class it1, class it2>
bool operator<(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit1.base() > myit2.base());
}
template <class it1, class it2>
bool operator>(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit1.base() < myit2.base());
}
template <class it1, class it2>
bool operator!=(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return myit1.base() != myit2.base();
}
template <class it1, class it2>
bool operator<=(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit1.base() >= myit2.base());
}
template <class it1, class it2>
bool operator>=(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit1.base() <= myit2.base());
}
template <class it1, class it2>
typename reverse_iterator<it1>::difference_type operator-(const reverse_iterator<it1>& myit1, const reverse_iterator<it2>& myit2)
{
return (myit2.base()) - (myit1.base());
}
}