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1 // Copyright (C) 2020 Free Software Foundation, Inc.
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2 //
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3 // This file is part of the GNU ISO C++ Library. This library is free
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4 // software; you can redistribute it and/or modify it under the
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5 // terms of the GNU General Public License as published by the
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6 // Free Software Foundation; either version 3, or (at your option)
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7 // any later version.
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8
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9 // This library is distributed in the hope that it will be useful,
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10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 // GNU General Public License for more details.
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13
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14 // You should have received a copy of the GNU General Public License along
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15 // with this library; see the file COPYING3. If not see
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16 // <http://www.gnu.org/licenses/>.
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17
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18 // { dg-do run }
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19
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20 #include <algorithm>
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21 #include <testsuite_hooks.h>
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22
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23 void
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24 test01()
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25 {
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26 volatile int i[2] = { 1, 2 };
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27 volatile int j[2] = { 0, 0 };
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28 int k[2] = { 0, 0 };
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29
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30 std::copy_backward(i, i+2, j+2);
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31 VERIFY( j[0] == 1 && j[1] == 2 );
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32 std::copy_backward(i, i+2, k+2);
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33 VERIFY( k[0] == 1 && k[1] == 2 );
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34 std::copy_backward(k+1, k+2, i+1);
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35 VERIFY( i[0] == 2 );
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36
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37 const volatile int* cj = j;
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38 std::copy_backward(cj, cj+2, i+2);
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39 VERIFY( i[0] == 1 && i[1] == 2 );
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40 std::copy_backward(cj+1, cj+2, k+1);
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41 VERIFY( k[0] == 2 );
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42 const int* ck = k;
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43 std::copy_backward(ck, ck+2, i+2);
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44 VERIFY( i[0] == 2 && i[1] == 2 );
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45 }
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46
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47 void
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48 test02()
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49 {
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50 #if __cplusplus > 201703L
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51 volatile int i[2] = { 1, 2 };
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52 volatile int j[2] = { 0, 0 };
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53 int k[2] = { 0, 0 };
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54
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55 std::ranges::copy_backward(i, i+2, j+2);
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56 VERIFY( j[0] == 1 && j[1] == 2 );
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57 std::ranges::copy_backward(i, i+2, k+2);
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58 VERIFY( k[0] == 1 && k[1] == 2 );
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59 std::ranges::copy_backward(k+1, k+2, i+1);
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60 VERIFY( i[0] == 2 );
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61
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62 const volatile int* cj = j;
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63 std::ranges::copy_backward(cj, cj+2, i+2);
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64 VERIFY( i[0] == 1 && i[1] == 2 );
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65 std::ranges::copy_backward(cj+1, cj+2, k+1);
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66 VERIFY( k[0] == 2 );
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67 const int* ck = k;
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68 std::ranges::copy_backward(ck, ck+2, i+2);
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69 VERIFY( i[0] == 2 && i[1] == 2 );
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70 #endif
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71 }
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72
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73 int
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74 main()
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75 {
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76 test01();
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77 test02();
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78 }
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