libcxx/test/std/numerics/numarray/template.valarray/valarray.cons/slice_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 slice_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, 12, 13, 14, 15};
  23     std::valarray<int> v1(a, sizeof(a)/sizeof(a[0]));
  24     std::valarray<int> v(v1[std::slice(1, 5, 3)]);
  25     assert(v.size() == 5);
  26     assert(v[0] == 1);
  27     assert(v[1] == 4);
  28     assert(v[2] == 7);
  29     assert(v[3] == 10);
  30     assert(v[4] == 13);
  31
  32   return 0;
  33 }