libcxx/test/std/numerics/numarray/template.valarray/valarray.unary/bit_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 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<T> 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 std::valarray<int> T;
  35         T a[] = {T(1), T(2), T(3), T(4), T(5)};
  36         const unsigned N = sizeof(a)/sizeof(a[0]);
  37         std::valarray<T> v(a, N);
  38         std::valarray<T> v2 = ~v;
  39         assert(v2.size() == v.size());
  40         for (unsigned i = 0; i < N; ++i)
  41         {
  42             assert(v2[i].size() == v[i].size());
  43             for (std::size_t j = 0; j < v[i].size(); ++j)
  44                 assert(v2[i][j] == ~v[i][j]);
  45         }
  46     }
  47     {
  48         typedef int T;
  49         T a[] = {1, 2, 3, 4, 5};
  50         const unsigned N = sizeof(a)/sizeof(a[0]);
  51         std::valarray<T> v(a, N);
  52         std::valarray<T> v2 = ~(v + v);
  53         assert(v2.size() == v.size());
  54         for (std::size_t i = 0; i < v2.size(); ++i)
  55             assert(v2[i] == ~(2*v[i]));
  56     }
  57     {
  58         // Make sure we don't have dangling reference problems with unary expressions
  59         int array[] = {1, 2, 3};
  60         std::valarray<int> a(array, 3);
  61         std::valarray<int> b(array, 3);
  62         auto c = ~a + b;
  63         assert(c.size() == 3);
  64         assert(c[0] == (~1 + 1) && c[1] == (~2 + 2) && c[2] == (~3 + 3));
  65     }
  66
  67     return 0;
  68 }