libcxx/test/std/numerics/numarray/valarray.nonmembers/valarray.binary/minus_valarray_valarray.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 // template<class T> valarray<T> operator-(const valarray<T>& x, const valarray<T>& y);
  14
  15 #include <valarray>
  16 #include <cassert>
  17 #include <cstddef>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     {
  24         typedef int T;
  25         T a1[] = {7,  9, 11, 13, 15};
  26         T a2[] = {6,  7,  8,  9, 10};
  27         T a3[] = {1,  2,  3,  4,  5};
  28         const unsigned N = sizeof(a1)/sizeof(a1[0]);
  29         std::valarray<T> v1(a1, N);
  30         std::valarray<T> v2(a2, N);
  31         std::valarray<T> v3 = v1 - v2;
  32         assert(v1.size() == v2.size());
  33         assert(v1.size() == v3.size());
  34         for (std::size_t i = 0; i < v1.size(); ++i)
  35             assert(v3[i] == a3[i]);
  36     }
  37
  38   return 0;
  39 }