libcxx/test/std/numerics/numarray/valarray.nonmembers/valarray.transcend/abs_valarray.pass.cpp

   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 // template<class T>
  14 //   valarray<T>
  15 //   abs(const valarray<T>& x);
  16
  17 #include <valarray>
  18 #include <cassert>
  19 #include <cstddef>
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     {
  26         typedef double T;
  27         T a1[] = {1.5,  -2.5,  3.4,  -4.5,  -5.0};
  28         T a3[] = {1.5,   2.5,  3.4,   4.5,   5.0};
  29         const unsigned N = sizeof(a1)/sizeof(a1[0]);
  30         std::valarray<T> v1(a1, N);
  31         std::valarray<T> v3 = abs(v1);
  32         assert(v3.size() == v1.size());
  33         for (std::size_t i = 0; i < v3.size(); ++i)
  34             assert(v3[i] == a3[i]);
  35     }
  36
  37   return 0;
  38 }