1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// <valarray>
// template<class T, size_t cnt> valarray(const T(&)[cnt], size_t) -> valarray<T>;
#include <valarray>
#include "test_macros.h"
int main(int, char**)
{
{
// From (initializer_list<T>)
std::valarray v = {1, 2, 3, 4, 5};
ASSERT_SAME_TYPE(decltype(v), std::valarray<int>);
}
{
// From (const T(&)[N], size_t)
long a[] = {1, 2, 3, 4, 5};
std::valarray v(a, 5);
ASSERT_SAME_TYPE(decltype(v), std::valarray<long>);
}
{
// From (const T&, size_t)
long a[] = {1, 2, 3, 4, 5};
std::valarray v(&a[0], 5);
// Surprising but true.
ASSERT_SAME_TYPE(decltype(v), std::valarray<long*>);
}
{
// From (slice_array<T>)
std::valarray<long> v{1,2,3,4,5};
std::valarray v2 = v[std::slice(2,3,1)];
static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
}
{
// From (gslice_array<T>)
std::valarray<long> v{1,2,3,4,5};
std::valarray v2 = v[std::gslice(0, {5}, {1})];
static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
}
{
// From (mask_array<T>)
std::valarray<long> v = {1, 2, 3, 4, 5};
std::valarray<bool> m = {true, false, true, false, true};
std::valarray v2 = v[m];
static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
}
{
// From (indirect_array<T>)
std::valarray<long> v = {1, 2, 3, 4, 5};
std::valarray<size_t> i = {1, 2, 3};
std::valarray v2 = v[i];
static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
}
return 0;
}
|
