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// valarray apply(value_type f(value_type)) const;
14
15#include <valarray>
16#include <cassert>
17
18#include "test_macros.h"
19
20typedef int T;
21
22T f(T t) {return t + 5;}
23
24int main(int, char**)
25{
26 {
27 T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
28 T a2[] = {6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
29 const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
30 std::valarray<T> v1(a1, N1);
31 std::valarray<T> v2 = v1.apply(func: f);
32 assert(v2.size() == N1);
33 for (unsigned i = 0; i < N1; ++i)
34 assert(v2[i] == a2[i]);
35 }
36 {
37 const unsigned N1 = 0;
38 std::valarray<T> v1;
39 std::valarray<T> v2 = v1.apply(func: f);
40 assert(v2.size() == N1);
41 }
42 {
43 T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
44 T a2[] = {7, 9, 11, 13, 15, 17, 19, 21, 23, 25};
45 const unsigned N1 = sizeof(a1)/sizeof(a1[0]);
46 std::valarray<T> v1(a1, N1);
47 std::valarray<T> v2 = (v1+v1).apply(f: f);
48 assert(v2.size() == N1);
49 for (unsigned i = 0; i < N1; ++i)
50 assert(v2[i] == a2[i]);
51 }
52
53 return 0;
54}
55

source code of libcxx/test/std/numerics/numarray/template.valarray/valarray.members/apply_value.pass.cpp