1 /*
2 Copyright (c) Alexander Zaitsev <zamazan4ik@gmail.by>, 2016
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6
7 For more information, see http://www.boost.org
8 */
9
10 #include <vector>
11 #include <list>
12 #include <iterator>
13 #include <functional>
14 #include <iostream>
15
16 #include <boost/algorithm/is_palindrome.hpp>
17
18
19 namespace ba = boost::algorithm;
20
21 template <typename T>
funcComparator(const T & v1,const T & v2)22 bool funcComparator(const T& v1, const T& v2)
23 {
24 return v1 == v2;
25 }
26
27 struct functorComparator
28 {
29 template <typename T>
operator ()functorComparator30 bool operator()(const T& v1, const T& v2) const
31 {
32 return v1 == v2;
33 }
34 };
35
36
main(int,char * [])37 int main ( int /*argc*/, char * /*argv*/ [] )
38 {
39 //You can this algorithm with iterators(minimum Bidirectional)
40 std::vector<int> vec{1,2,1};
41 if(ba::is_palindrome(vec.begin(), vec.end()))
42 std::cout << "This container is palindrome" << std::endl;
43 else
44 std::cout << "This container is not palindrome" << std::endl;
45
46
47 //Of course, you can use const iterators
48 if(ba::is_palindrome(vec.cbegin(), vec.cend()))
49 std::cout << "This container is palindrome" << std::endl;
50 else
51 std::cout << "This container is not palindrome" << std::endl;
52
53
54 //Example with bidirectional iterators
55 std::list<int> list{1,2,1};
56 if(ba::is_palindrome(list.begin(), list.end()))
57 std::cout << "This container is palindrome" << std::endl;
58 else
59 std::cout << "This container is not palindrome" << std::endl;
60
61
62 //You can use custom comparators like functions, functors, lambdas
63 auto lambdaComparator = [](int v1, int v2){ return v1 == v2; };
64 auto objFunc = std::function<bool(int, int)>(lambdaComparator);
65
66 if(ba::is_palindrome(vec.begin(), vec.end(), lambdaComparator))
67 std::cout << "This container is palindrome" << std::endl;
68 else
69 std::cout << "This container is not palindrome" << std::endl;
70
71 if(ba::is_palindrome(vec.begin(), vec.end(), funcComparator<int>))
72 std::cout << "This container is palindrome" << std::endl;
73 else
74 std::cout << "This container is not palindrome" << std::endl;
75
76 if(ba::is_palindrome(vec.begin(), vec.end(), functorComparator()))
77 std::cout << "This container is palindrome" << std::endl;
78 else
79 std::cout << "This container is not palindrome" << std::endl;
80
81 if(ba::is_palindrome(vec.begin(), vec.end(), objFunc))
82 std::cout << "This container is palindrome" << std::endl;
83 else
84 std::cout << "This container is not palindrome" << std::endl;
85
86
87 //You can use ranges
88 if(ba::is_palindrome(vec))
89 std::cout << "This container is palindrome" << std::endl;
90 else
91 std::cout << "This container is not palindrome" << std::endl;
92
93 //You can use C-strings
94 if(ba::is_palindrome("aba"))
95 std::cout << "This C-string is palindrome" << std::endl;
96 else
97 std::cout << "This C-string is not palindrome" << std::endl;
98 return 0;
99 }
100