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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-options "-std=gnu++2a" }
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19 // { dg-do compile { target c++2a } }
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20
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21 #include <iterator>
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22
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23 using namespace std;
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24
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25 // Define our own of version of indirectly_readable_impl here,
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26 // to check the use of iter_move even if the real concept in
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27 // <bits/iterator_concepts.h> no longer uses iter_move.
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28 template<class In>
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29 concept indirectly_readable_impl
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30 = requires(const In in)
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31 {
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32 typename iter_value_t<In>;
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33 typename iter_reference_t<In>;
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34 typename iter_rvalue_reference_t<In>;
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35 { *in } -> same_as<iter_reference_t<In>>;
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36 { ranges::iter_move(in) } -> same_as<iter_rvalue_reference_t<In>>;
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37 };
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38
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39 template<class T> requires indirectly_readable_impl<projected<T*, identity>>
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40 void algo(T)
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41 { }
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42
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43 void
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44 test01()
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45 {
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46 // PR libstdc++/92894
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47 // Verify that the use of range::iter_move above doesn't cause odr-use of
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48 // projected<local-class-type, identity>::operator* (which is not defined).
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49 struct X { };
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50 X a;
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51 algo(a);
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52 }
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