1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <valarray>
10
11 // template<class T> class valarray;
12
13 // slice_array<value_type> operator[](slice s);
14
15 #include <valarray>
16 #include <cassert>
17
18 #include "test_macros.h"
19
main(int,char **)20 int main(int, char**)
21 {
22 {
23 int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
24 int a2[] = {-1, -2, -3, -4, -5};
25 std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
26 std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
27 v1[std::slice(1, 5, 3)] = v2;
28 assert(v1.size() == 16);
29 assert(v1[ 0] == 0);
30 assert(v1[ 1] == -1);
31 assert(v1[ 2] == 2);
32 assert(v1[ 3] == 3);
33 assert(v1[ 4] == -2);
34 assert(v1[ 5] == 5);
35 assert(v1[ 6] == 6);
36 assert(v1[ 7] == -3);
37 assert(v1[ 8] == 8);
38 assert(v1[ 9] == 9);
39 assert(v1[10] == -4);
40 assert(v1[11] == 11);
41 assert(v1[12] == 12);
42 assert(v1[13] == -5);
43 assert(v1[14] == 14);
44 assert(v1[15] == 15);
45 }
46 {
47 int a1[] = {0, 1, 2, 3, 4, 5};
48 std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
49 std::valarray<int> v2((v1 + 0)[std::slice(0, 3, 2)]);
50 assert(v2.size() == 3);
51 assert(v2[0] == 0);
52 assert(v2[1] == 2);
53 assert(v2[2] == 4);
54 }
55 return 0;
56 }
57