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 // valarray apply(value_type f(value_type)) const;
14 
15 #include <valarray>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 typedef int T;
21 
22 T f(T t) {return t + 5;}
23 
24 int main(int, char**)
25 {
26     {
27         T a1[] = {1, 2, 3, 4,  5,  6,  7,  8,  9, 10};
28         T a2[] = {6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
29         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
30         std::valarray<T> v1(a1, N1);
31         std::valarray<T> v2 = v1.apply(f);
32         assert(v2.size() == N1);
33         for (unsigned i = 0; i < N1; ++i)
34             assert(v2[i] == a2[i]);
35     }
36     {
37         const unsigned N1 = 0;
38         std::valarray<T> v1;
39         std::valarray<T> v2 = v1.apply(f);
40         assert(v2.size() == N1);
41     }
42     {
43         T a1[] = {1, 2, 3, 4,  5,  6,  7,  8,  9, 10};
44         T a2[] = {7, 9, 11, 13, 15, 17, 19, 21, 23, 25};
45         const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
46         std::valarray<T> v1(a1, N1);
47         std::valarray<T> v2 = (v1+v1).apply(f);
48         assert(v2.size() == N1);
49         for (unsigned i = 0; i < N1; ++i)
50             assert(v2[i] == a2[i]);
51     }
52 
53   return 0;
54 }
55