libcxx/test/std/numerics/numarray/template.valarray/valarray.cons/size.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 // explicit valarray(size_t);
  14
  15 #include <valarray>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 struct S {
  21     S() : x(1) {}
  22     ~S() { ++cnt_dtor; }
  23     int x;
  24     static std::size_t cnt_dtor;
  25 };
  26
  27 size_t S::cnt_dtor = 0;
  28
  29 int main(int, char**)
  30 {
  31     {
  32         std::valarray<int> v(100);
  33         assert(v.size() == 100);
  34         for (int i = 0; i < 100; ++i)
  35             assert(v[i] == 0);
  36     }
  37     {
  38         std::valarray<double> v(100);
  39         assert(v.size() == 100);
  40         for (int i = 0; i < 100; ++i)
  41             assert(v[i] == 0);
  42     }
  43     {
  44         std::valarray<std::valarray<double> > v(100);
  45         assert(v.size() == 100);
  46         for (int i = 0; i < 100; ++i)
  47             assert(v[i].size() == 0);
  48     }
  49     {
  50         std::valarray<S> v(100);
  51         assert(v.size() == 100);
  52         for (int i = 0; i < 100; ++i)
  53             assert(v[i].x == 1);
  54     }
  55     assert(S::cnt_dtor == 100);
  56
  57   return 0;
  58 }