1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <valarray>
11 
12 // template<class T> class valarray;
13 
14 // valarray cshift(int i) const;
15 
16 #include <valarray>
17 #include <cassert>
18 
main()19 int main()
20 {
21     {
22         typedef int T;
23         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
24         T a2[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
25         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
26         std::valarray<T> v1(a1, N1);
27         std::valarray<T> v2 = v1.cshift(0);
28         assert(v2.size() == N1);
29         for (unsigned i = 0; i < N1; ++i)
30             assert(v2[i] == a2[i]);
31     }
32     {
33         typedef int T;
34         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
35         T a2[] = {4, 5, 6, 7, 8, 9, 10, 1, 2, 3};
36         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
37         std::valarray<T> v1(a1, N1);
38         std::valarray<T> v2 = v1.cshift(3);
39         assert(v2.size() == N1);
40         for (unsigned i = 0; i < N1; ++i)
41             assert(v2[i] == a2[i]);
42     }
43     {
44         typedef int T;
45         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
46         T a2[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
47         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
48         std::valarray<T> v1(a1, N1);
49         std::valarray<T> v2 = v1.cshift(10);
50         assert(v2.size() == N1);
51         for (unsigned i = 0; i < N1; ++i)
52             assert(v2[i] == a2[i]);
53     }
54     {
55         typedef int T;
56         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
57         T a2[] = {8, 9, 10, 1, 2, 3, 4, 5, 6, 7};
58         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
59         std::valarray<T> v1(a1, N1);
60         std::valarray<T> v2 = v1.cshift(17);
61         assert(v2.size() == N1);
62         for (unsigned i = 0; i < N1; ++i)
63             assert(v2[i] == a2[i]);
64     }
65     {
66         typedef int T;
67         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
68         T a2[] = {8, 9, 10, 1, 2, 3, 4, 5, 6, 7};
69         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
70         std::valarray<T> v1(a1, N1);
71         std::valarray<T> v2 = v1.cshift(-3);
72         assert(v2.size() == N1);
73         for (unsigned i = 0; i < N1; ++i)
74             assert(v2[i] == a2[i]);
75     }
76     {
77         typedef int T;
78         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
79         T a2[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
80         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
81         std::valarray<T> v1(a1, N1);
82         std::valarray<T> v2 = v1.cshift(-10);
83         assert(v2.size() == N1);
84         for (unsigned i = 0; i < N1; ++i)
85             assert(v2[i] == a2[i]);
86     }
87     {
88         typedef int T;
89         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
90         T a2[] = {4, 5, 6, 7, 8, 9, 10, 1, 2, 3};
91         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
92         std::valarray<T> v1(a1, N1);
93         std::valarray<T> v2 = v1.cshift(-17);
94         assert(v2.size() == N1);
95         for (unsigned i = 0; i < N1; ++i)
96             assert(v2[i] == a2[i]);
97     }
98     {
99         typedef int T;
100         const unsigned N1 = 0;
101         std::valarray<T> v1;
102         std::valarray<T> v2 = v1.cshift(-17);
103         assert(v2.size() == N1);
104     }
105     {
106         typedef int T;
107         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
108         T a2[] = {8, 10, 12, 14, 16, 18, 20, 2, 4, 6};
109         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
110         std::valarray<T> v1(a1, N1);
111         std::valarray<T> v2 = (v1 + v1).cshift(3);
112         assert(v2.size() == N1);
113         for (unsigned i = 0; i < N1; ++i)
114             assert(v2[i] == a2[i]);
115     }
116     {
117         typedef int T;
118         T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
119         T a2[] = {16, 18, 20, 2, 4, 6, 8, 10, 12, 14};
120         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
121         std::valarray<T> v1(a1, N1);
122         std::valarray<T> v2 = (v1 + v1).cshift(-3);
123         assert(v2.size() == N1);
124         for (unsigned i = 0; i < N1; ++i)
125             assert(v2[i] == a2[i]);
126     }
127 }
128