| //===----------------------------------------------------------------------===// |
| // |
| // 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; |
| |
| // template<class T> |
| // valarray<T> |
| // pow(const T& x, const valarray<T>& y); |
| |
| #include <valarray> |
| #include <cassert> |
| #include <sstream> |
| #include <cstddef> |
| |
| #include "test_macros.h" |
| |
| bool is_about(double x, double y, int p) |
| { |
| std::ostringstream o; |
| o.precision(p); |
| scientific(o); |
| o << x; |
| std::string a = o.str(); |
| o.str(""); |
| o << y; |
| return a == o.str(); |
| } |
| |
| int main(int, char**) |
| { |
| { |
| typedef double T; |
| T a1[] = {.9, .5, 0., .5, .75}; |
| T a3[] = {1.8660659830736148e+00, |
| 1.4142135623730951e+00, |
| 1.0000000000000000e+00, |
| 1.4142135623730951e+00, |
| 1.6817928305074290e+00}; |
| const unsigned N = sizeof(a1)/sizeof(a1[0]); |
| std::valarray<T> v1(a1, N); |
| std::valarray<T> v3 = pow(2.0, v1); |
| assert(v3.size() == v1.size()); |
| for (std::size_t i = 0; i < v3.size(); ++i) |
| assert(is_about(v3[i], a3[i], 10)); |
| } |
| |
| return 0; |
| } |