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// UNSUPPORTED: c++03
10
11// <valarray>
12
13// template<class T> class valarray;
14
15// valarray& operator=(initializer_list<value_type> il);
16
17#include <valarray>
18#include <cassert>
19#include <cstddef>
20
21#include "test_macros.h"
22
23struct S
24{
25 S() : x_(0) { default_ctor_called = true; }
26 S(int x) : x_(x) {}
27 int x_;
28 static bool default_ctor_called;
29};
30
31bool S::default_ctor_called = false;
32
33bool operator==(const S& lhs, const S& rhs)
34{
35 return lhs.x_ == rhs.x_;
36}
37
38int main(int, char**)
39{
40 {
41 typedef int T;
42 T a[] = {1, 2, 3, 4, 5};
43 const unsigned N = sizeof(a)/sizeof(a[0]);
44 std::valarray<T> v2;
45 v2 = {1, 2, 3, 4, 5};
46 assert(v2.size() == N);
47 for (std::size_t i = 0; i < v2.size(); ++i)
48 assert(v2[i] == a[i]);
49 }
50 {
51 typedef double T;
52 T a[] = {1, 2.5, 3, 4.25, 5};
53 const unsigned N = sizeof(a)/sizeof(a[0]);
54 std::valarray<T> v2;
55 v2 = {1, 2.5, 3, 4.25, 5};
56 assert(v2.size() == N);
57 for (std::size_t i = 0; i < v2.size(); ++i)
58 assert(v2[i] == a[i]);
59 }
60 {
61 typedef std::valarray<double> T;
62 T a[] = {T(1), T(2), T(3), T(4), T(5)};
63 const unsigned N = sizeof(a)/sizeof(a[0]);
64 std::valarray<T> v2(a, N-2);
65 v2 = {T(1), T(2), T(3), T(4), T(5)};
66 assert(v2.size() == N);
67 for (unsigned i = 0; i < N; ++i)
68 {
69 assert(v2[i].size() == a[i].size());
70 for (std::size_t j = 0; j < a[i].size(); ++j)
71 assert(v2[i][j] == a[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> v2;
79 v2 = {T(1), T(2), T(3), T(4), T(5)};
80 assert(v2.size() == N);
81 for (std::size_t i = 0; i < v2.size(); ++i)
82 assert(v2[i] == a[i]);
83 assert(!S::default_ctor_called);
84 }
85
86 return 0;
87}
88

source code of libcxx/test/std/numerics/numarray/template.valarray/valarray.assign/initializer_list_assign.pass.cpp