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& operator=(const valarray& v);
15
16 #include <valarray>
17 #include <cassert>
18 #include <cstddef>
19
20 struct S
21 {
SS22 S() : x_(0) { default_ctor_called = true; }
SS23 S(int x) : x_(x) {}
24 int x_;
25 static bool default_ctor_called;
26 };
27
28 bool S::default_ctor_called = false;
29
operator ==(const S & lhs,const S & rhs)30 bool operator==(const S& lhs, const S& rhs)
31 {
32 return lhs.x_ == rhs.x_;
33 }
34
main()35 int main()
36 {
37 {
38 typedef int T;
39 T a[] = {1, 2, 3, 4, 5};
40 const unsigned N = sizeof(a)/sizeof(a[0]);
41 std::valarray<T> v(a, N);
42 std::valarray<T> v2;
43 v2 = v;
44 assert(v2.size() == v.size());
45 for (std::size_t i = 0; i < v2.size(); ++i)
46 assert(v2[i] == v[i]);
47 }
48 {
49 typedef double T;
50 T a[] = {1, 2.5, 3, 4.25, 5};
51 const unsigned N = sizeof(a)/sizeof(a[0]);
52 std::valarray<T> v(a, N);
53 std::valarray<T> v2;
54 v2 = v;
55 assert(v2.size() == v.size());
56 for (std::size_t i = 0; i < v2.size(); ++i)
57 assert(v2[i] == v[i]);
58 }
59 {
60 typedef std::valarray<double> T;
61 T a[] = {T(1), T(2), T(3), T(4), T(5)};
62 const unsigned N = sizeof(a)/sizeof(a[0]);
63 std::valarray<T> v(a, N);
64 std::valarray<T> v2(a, N-2);
65 v2 = v;
66 assert(v2.size() == v.size());
67 for (unsigned i = 0; i < N; ++i)
68 {
69 assert(v2[i].size() == v[i].size());
70 for (std::size_t j = 0; j < v[i].size(); ++j)
71 assert(v2[i][j] == v[i][j]);
72 }
73 }
74 {
75 typedef S T;
76 T a[] = {T(1), T(2), T(3), T(4), T(5)};
77 const unsigned N = sizeof(a)/sizeof(a[0]);
78 std::valarray<T> v(a, N);
79 std::valarray<T> v2;
80 v2 = v;
81 assert(v2.size() == v.size());
82 for (std::size_t i = 0; i < v2.size(); ++i)
83 assert(v2[i] == v[i]);
84 assert(!S::default_ctor_called);
85 }
86 }
87