libcxx/test/std/numerics/numarray/template.valarray/valarray.cons/gslice_array.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(const gslice_array<value_type>& sa);
  14
  15 #include <valarray>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     int a[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,
  23                12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
  24                24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
  25                36, 37, 38, 39, 40};
  26     std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));
  27     std::size_t sz[] = {2, 4, 3};
  28     std::size_t st[] = {19, 4, 1};
  29     typedef std::valarray<std::size_t> sizes;
  30     typedef std::valarray<std::size_t> strides;
  31     std::valarray<int> v(v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
  32                                          strides(st, sizeof(st)/sizeof(st[0])))]);
  33     assert(v.size() == 24);
  34     assert(v[ 0] ==  3);
  35     assert(v[ 1] ==  4);
  36     assert(v[ 2] ==  5);
  37     assert(v[ 3] ==  7);
  38     assert(v[ 4] ==  8);
  39     assert(v[ 5] ==  9);
  40     assert(v[ 6] == 11);
  41     assert(v[ 7] == 12);
  42     assert(v[ 8] == 13);
  43     assert(v[ 9] == 15);
  44     assert(v[10] == 16);
  45     assert(v[11] == 17);
  46     assert(v[12] == 22);
  47     assert(v[13] == 23);
  48     assert(v[14] == 24);
  49     assert(v[15] == 26);
  50     assert(v[16] == 27);
  51     assert(v[17] == 28);
  52     assert(v[18] == 30);
  53     assert(v[19] == 31);
  54     assert(v[20] == 32);
  55     assert(v[21] == 34);
  56     assert(v[22] == 35);
  57     assert(v[23] == 36);
  58
  59   return 0;
  60 }