libstdc++-v3/testsuite/26_numerics/valarray/valarray_subset_assignment.cc

   1 // 2004-01-03  Jerry Quinn  <jlquinn@optonline.net>
   2
   3 // Copyright (C) 2004 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // PR 3247
  31
  32 // This is DR-253.  Test for accessible assignment-operators.
  33 #include <valarray>
  34 #include <testsuite_hooks.h>
  35
  36 bool check_array(std::valarray<double>& a, double b[])
  37 {
  38   for (unsigned int i=0; i < a.size(); i++)
  39     if (a[i] != b[i]) return false;
  40   return true;
  41 }
  42
  43 int main()
  44 {
  45   std::valarray<double> val_d(10);  //  0 1 2 3 4 5 6 7 8 9
  46   std::valarray<double> val_d1(10); // 10 9 8 7 6 5 4 3 2 1
  47
  48   for (int i=0; i< 10; i++) { val_d[i] = 10;  val_d1[i] = i; }
  49   std::valarray<double> val_c(val_d);
  50   std::valarray<double> val_f(val_d);
  51   std::valarray<double> val_g(val_d);
  52
  53   std::slice slc(1, 3, 3);      // 1 4 7
  54   val_d[slc] = val_d1[slc];
  55
  56   double ans1[10] = {10, 1, 10, 10, 4, 10, 10, 7, 10, 10};
  57   VERIFY(check_array(val_d, ans1));
  58
  59   std::valarray<std::size_t> val_size(2);
  60   std::valarray<std::size_t> val_stride(2);
  61   val_size[0] = 2;   val_size[1] = 3;
  62   val_stride[0] = 4; val_stride[1] = 1;
  63
  64   std::gslice gslc(1, val_size, val_stride);
  65   val_c[gslc] = val_d1[gslc];
  66
  67   double ans2[10] = {10, 1, 2, 3, 10, 5, 6, 7, 10, 10};
  68   VERIFY(check_array(val_c, ans2));
  69
  70   std::valarray<bool> val_b(false, 10);
  71   val_b[2] = val_b[6] = val_b[9] = true;
  72   val_f[val_b] = val_d1[val_b];
  73
  74   double ans3[10] = {10, 10, 2, 10, 10, 10, 6, 10, 10, 9};
  75   VERIFY(check_array(val_f, ans3));
  76
  77   size_t addr[] = {1, 2, 3, 4, 5};
  78   size_t addr1[] = {2, 7, 1, 9, 4};
  79   std::valarray<std::size_t> val_indirect(addr, 5);
  80   std::valarray<std::size_t> val_indirect1(addr1, 5);
  81   val_g[val_indirect] = val_d1[val_indirect1];
  82
  83   double ans4[10] = {10, 2, 7, 1, 9, 4, 10, 10, 10, 10};
  84   VERIFY(check_array(val_g, ans4));
  85
  86   return 0;
  87 };