| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <valarray> |
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| 10 | |
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| 11 | // template<class T> class valarray; |
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| 12 | |
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| 13 | // template<class T> |
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| 14 | // valarray<T> |
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| 15 | // atan(const valarray<T>& x); |
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| 16 | |
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| 17 | #include <valarray> |
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| 18 | #include <cassert> |
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| 19 | #include <cstddef> |
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| 20 | |
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| 21 | #include "test_macros.h" |
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| 22 | #include "valarray_helper.h" |
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| 23 | |
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| 24 | int main(int, char**) |
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| 25 | { |
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| 26 | { |
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| 27 | typedef double T; |
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| 28 | T a1[] = {-.9, -.5, 0., .5, .75}; |
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| 29 | T a3[] = {-7.3281510178650666e-01, |
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| 30 | -4.6364760900080615e-01, |
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| 31 | 0.0000000000000000e+00, |
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| 32 | 4.6364760900080615e-01, |
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| 33 | 6.4350110879328437e-01}; |
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| 34 | const unsigned N = sizeof(a1)/sizeof(a1[0]); |
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| 35 | std::valarray<T> v1(a1, N); |
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| 36 | std::valarray<T> v3 = atan(v: v1); |
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| 37 | assert(v3.size() == v1.size()); |
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| 38 | for (std::size_t i = 0; i < v3.size(); ++i) |
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| 39 | assert(is_about(v3[i], a3[i], 10)); |
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| 40 | } |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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