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1 // { dg-options "-std=gnu++2a" }
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2 // { dg-do run { target c++2a } }
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3
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4 // Copyright (C) 2020 Free Software Foundation, Inc.
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5 //
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6 // This file is part of the GNU ISO C++ Library. This library is free
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7 // software; you can redistribute it and/or modify it under the
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8 // terms of the GNU General Public License as published by the
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9 // Free Software Foundation; either version 3, or (at your option)
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10 // any later version.
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11 //
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12 // This library is distributed in the hope that it will be useful,
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13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 // GNU General Public License for more details.
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16 //
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17 // You should have received a copy of the GNU General Public License along
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18 // with this library; see the file COPYING3. If not see
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19 // <http://www.gnu.org/licenses/>.
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20
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21 #include <map>
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22 #include <testsuite_hooks.h>
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23
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24 struct aggressive_aggregate
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25 {
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26 int a;
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27 int b;
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28 };
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29
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30 void test_emplace()
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31 {
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32 std::multimap<int, aggressive_aggregate> x;
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33 auto it = x.emplace(std::piecewise_construct,
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34 std::tuple(0), std::tuple(1, 2));
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35 VERIFY(it->second.a == 1);
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36 VERIFY(it->second.b == 2);
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37 it = x.emplace(std::piecewise_construct,
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38 std::tuple(1), std::tuple(1));
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39 VERIFY(it->second.a == 1);
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40 VERIFY(it->second.b == 0);
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41 it = x.emplace(std::piecewise_construct,
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42 std::tuple(2), std::tuple());
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43 VERIFY(it->second.a == 0);
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44 VERIFY(it->second.b == 0);
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45 }
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46
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47 void test_emplace_hint()
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48 {
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49 std::multimap<int, aggressive_aggregate> x;
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50 auto it = x.emplace_hint(x.begin(),
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51 std::piecewise_construct,
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52 std::tuple(3), std::tuple(1, 2));
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53 VERIFY(it->second.a == 1);
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54 VERIFY(it->second.b == 2);
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55 it = x.emplace_hint(x.begin(),
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56 std::piecewise_construct,
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57 std::tuple(4), std::tuple(1));
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58 VERIFY(it->second.a == 1);
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59 VERIFY(it->second.b == 0);
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60 it = x.emplace_hint(x.begin(),
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61 std::piecewise_construct,
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62 std::tuple(5), std::tuple());
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63 VERIFY(it->second.a == 0);
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64 VERIFY(it->second.b == 0);
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65 }
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66
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67 int main()
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68 {
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69 test_emplace();
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70 test_emplace_hint();
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71 }
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