libcxx/test/std/numerics/numarray/template.mask.array/mask.array.comp.assign/multiply.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 mask_array
  12
  13 // void operator*=(const valarray<value_type>& v) const;
  14
  15 #include <valarray>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
  23     const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
  24     int a2[] = {1, 2, 3, 4, 5};
  25     const std::size_t N2 = sizeof(a2)/sizeof(a2[0]);
  26     bool b[N1] = {true,  false, false, true,  true,  false,
  27                   false, true,  false, false, false, true};
  28     std::valarray<int> v1(a1, N1);
  29     std::valarray<int> v2(a2, N2);
  30     assert(N2 == std::count(b, b+N1, true));
  31     std::valarray<bool> vb(b, N1);
  32     v1[vb] *= v2;
  33     assert(v1.size() == 16);
  34     assert(v1[ 0] ==  0);
  35     assert(v1[ 1] ==  1);
  36     assert(v1[ 2] ==  2);
  37     assert(v1[ 3] ==  6);
  38     assert(v1[ 4] == 12);
  39     assert(v1[ 5] ==  5);
  40     assert(v1[ 6] ==  6);
  41     assert(v1[ 7] == 28);
  42     assert(v1[ 8] ==  8);
  43     assert(v1[ 9] ==  9);
  44     assert(v1[10] == 10);
  45     assert(v1[11] == 55);
  46     assert(v1[12] == 12);
  47     assert(v1[13] == 13);
  48     assert(v1[14] == 14);
  49     assert(v1[15] == 15);
  50
  51   return 0;
  52 }