libcxx/test/std/numerics/numarray/template.valarray/valarray.sub/gslice_const.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 // gslice_array<value_type> operator[](const gslice& gs);
  14
  15 #include <valarray>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     {
  23         int a1[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,
  24                     12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
  25                     24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
  26                     36, 37, 38, 39, 40};
  27         int a2[] = { -0,  -1,  -2,  -3,  -4,  -5,  -6,  -7,  -8,  -9, -10, -11,
  28                     -12, -13, -14, -15, -16, -17, -18, -19, -20, -21, -22, -23};
  29         std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
  30         std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
  31         std::size_t sz[] = {2, 4, 3};
  32         std::size_t st[] = {19, 4, 1};
  33         typedef std::valarray<std::size_t> sizes;
  34         typedef std::valarray<std::size_t> strides;
  35         v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
  36                           strides(st, sizeof(st)/sizeof(st[0])))] = v2;
  37         assert(v1.size() == 41);
  38         assert(v1[ 0] ==  0);
  39         assert(v1[ 1] ==  1);
  40         assert(v1[ 2] ==  2);
  41         assert(v1[ 3] ==  0);
  42         assert(v1[ 4] == -1);
  43         assert(v1[ 5] == -2);
  44         assert(v1[ 6] ==  6);
  45         assert(v1[ 7] == -3);
  46         assert(v1[ 8] == -4);
  47         assert(v1[ 9] == -5);
  48         assert(v1[10] == 10);
  49         assert(v1[11] == -6);
  50         assert(v1[12] == -7);
  51         assert(v1[13] == -8);
  52         assert(v1[14] == 14);
  53         assert(v1[15] == -9);
  54         assert(v1[16] == -10);
  55         assert(v1[17] == -11);
  56         assert(v1[18] == 18);
  57         assert(v1[19] == 19);
  58         assert(v1[20] == 20);
  59         assert(v1[21] == 21);
  60         assert(v1[22] == -12);
  61         assert(v1[23] == -13);
  62         assert(v1[24] == -14);
  63         assert(v1[25] == 25);
  64         assert(v1[26] == -15);
  65         assert(v1[27] == -16);
  66         assert(v1[28] == -17);
  67         assert(v1[29] == 29);
  68         assert(v1[30] == -18);
  69         assert(v1[31] == -19);
  70         assert(v1[32] == -20);
  71         assert(v1[33] == 33);
  72         assert(v1[34] == -21);
  73         assert(v1[35] == -22);
  74         assert(v1[36] == -23);
  75         assert(v1[37] == 37);
  76         assert(v1[38] == 38);
  77         assert(v1[39] == 39);
  78         assert(v1[40] == 40);
  79     }
  80
  81     return 0;
  82 }