libcxx/test/std/numerics/numarray/template.valarray/valarray.unary/not.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 // valarray<bool> operator!() const;
  14
  15 #include <valarray>
  16 #include <cassert>
  17 #include <cstddef>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     {
  24         typedef int T;
  25         T a[] = {1, 2, 3, 4, 5};
  26         const unsigned N = sizeof(a)/sizeof(a[0]);
  27         std::valarray<T> v(a, N);
  28         std::valarray<bool> v2 = !v;
  29         assert(v2.size() == v.size());
  30         for (std::size_t i = 0; i < v2.size(); ++i)
  31             assert(v2[i] == !v[i]);
  32     }
  33     {
  34         typedef double T;
  35         T a[] = {1, 2.5, 3, 4.25, 5};
  36         const unsigned N = sizeof(a)/sizeof(a[0]);
  37         std::valarray<T> v(a, N);
  38         std::valarray<bool> v2 = !(v + v);
  39         assert(v2.size() == v.size());
  40         for (std::size_t i = 0; i < v2.size(); ++i)
  41             assert(v2[i] == !(v[i] + v[i]));
  42     }
  43     {
  44         // Make sure we don't have dangling reference problems with unary expressions
  45         bool array[] = {true, false, true};
  46         std::valarray<bool> a(array, 3);
  47         std::valarray<bool> b(array, 3);
  48         auto c = !a && b;
  49         assert(c.size() == 3);
  50         assert(c[0] == false && c[1] == false && c[2] == false);
  51     }
  52
  53     return 0;
  54 }