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
74
75
76
77
78
79
80
81
82
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <valarray>
// template<class T> class valarray;
// valarray& operator-=(const valarray& v);
// [valarray.syn]/3
// Any function returning a valarray<T> is permitted to return an object of
// another type, provided all the const member functions of valarray<T> are
// also applicable to this type.
//
// Libc++ uses this and returns __val_expr<_Expr> for several operations.
//
// The const overloads of
// valarray::operator[](...) const
// return proxy objects. These proxies are implicitly convertible to
// std::valarray.
//
// Validate the function works for valarray, the proxies, and __val_expr.
#include <valarray>
#include <cassert>
#include <cstddef>
#include "test_macros.h"
template <class A>
void test(const A& rhs) {
int input[] = {7, 9, 11, 13, 15};
int expected[] = {1, 2, 3, 4, 5};
const unsigned N = sizeof(input) / sizeof(input[0]);
std::valarray<int> value(input, N);
value -= rhs;
assert(value.size() == N);
for (std::size_t i = 0; i < value.size(); ++i)
assert(value[i] == expected[i]);
}
int main(int, char**) {
int input[] = {6, 7, 8, 9, 10};
const unsigned N = sizeof(input) / sizeof(input[0]);
std::valarray<bool> mask(true, N);
std::size_t indices[] = {0, 1, 2, 3, 4};
std::valarray<std::size_t> indirect(indices, N);
std::valarray<int> zero(0, N);
{
std::valarray<int> value(input, N);
test(value);
test(value[std::slice(0, N, 1)]);
test(value[std::gslice(0, std::valarray<std::size_t>(N, 1), std::valarray<std::size_t>(1, 1))]);
test(value[mask]);
test(value[indirect]);
test(value + zero);
}
{
const std::valarray<int> value(input, N);
test(value);
test(value[std::slice(0, N, 1)]);
test(value[std::gslice(0, std::valarray<std::size_t>(N, 1), std::valarray<std::size_t>(1, 1))]);
test(value[mask]);
test(value[indirect]);
test(value + zero);
}
return 0;
}
|
