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// template<class T>
14// void
15// swap(valarray<T>& x, valarray<T>& y);
16
17#include <valarray>
18#include <cassert>
19#include <cstddef>
20
21#include "test_macros.h"
22
23int main(int, char**)
24{
25 {
26 typedef int T;
27 T a1[] = {1, 2, 3, 4, 5};
28 T a2[] = {6, 7, 8, 9, 10, 11, 12};
29 const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
30 const unsigned N2 = sizeof(a2)/sizeof(a2[0]);
31 std::valarray<T> v1(a1, N1);
32 std::valarray<T> v2(a2, N2);
33 std::valarray<T> v1_save = v1;
34 std::valarray<T> v2_save = v2;
35 swap(v1, v2);
36 assert(v1.size() == v2_save.size());
37 for (std::size_t i = 0; i < v1.size(); ++i)
38 assert(v1[i] == v2_save[i]);
39 assert(v2.size() == v1_save.size());
40 for (std::size_t i = 0; i < v2.size(); ++i)
41 assert(v2[i] == v1_save[i]);
42 }
43 {
44 typedef int T;
45 T a1[] = {1, 2, 3, 4, 5};
46 const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
47 std::valarray<T> v1(a1, N1);
48 std::valarray<T> v2;
49 std::valarray<T> v1_save = v1;
50 std::valarray<T> v2_save = v2;
51 swap(v1, v2);
52 assert(v1.size() == v2_save.size());
53 for (std::size_t i = 0; i < v1.size(); ++i)
54 assert(v1[i] == v2_save[i]);
55 assert(v2.size() == v1_save.size());
56 for (std::size_t i = 0; i < v2.size(); ++i)
57 assert(v2[i] == v1_save[i]);
58 }
59 {
60 typedef int T;
61 T a2[] = {6, 7, 8, 9, 10, 11, 12};
62 const unsigned N2 = sizeof(a2)/sizeof(a2[0]);
63 std::valarray<T> v1;
64 std::valarray<T> v2(a2, N2);
65 std::valarray<T> v1_save = v1;
66 std::valarray<T> v2_save = v2;
67 swap(v1, v2);
68 assert(v1.size() == v2_save.size());
69 for (std::size_t i = 0; i < v1.size(); ++i)
70 assert(v1[i] == v2_save[i]);
71 assert(v2.size() == v1_save.size());
72 for (std::size_t i = 0; i < v2.size(); ++i)
73 assert(v2[i] == v1_save[i]);
74 }
75 {
76 typedef int T;
77 std::valarray<T> v1;
78 std::valarray<T> v2;
79 std::valarray<T> v1_save = v1;
80 std::valarray<T> v2_save = v2;
81 swap(v1, v2);
82 assert(v1.size() == v2_save.size());
83 for (std::size_t i = 0; i < v1.size(); ++i)
84 assert(v1[i] == v2_save[i]);
85 assert(v2.size() == v1_save.size());
86 for (std::size_t i = 0; i < v2.size(); ++i)
87 assert(v2[i] == v1_save[i]);
88 }
89
90 return 0;
91}
92

source code of libcxx/test/std/numerics/numarray/valarray.nonmembers/valarray.special/swap.pass.cpp