comparison libstdc++-v3/testsuite/24_iterators/customization_points/92894.cc @ 19:2b5abeee2509 default tip

update gcc11
author anatofuz
date Mon, 25 May 2020 07:50:57 +0900
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18:1830386684a0 19:2b5abeee2509
1 // Copyright (C) 2020 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
17
18 // { dg-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
20
21 #include <iterator>
22
23 using namespace std;
24
25 // Define our own of version of indirectly_readable_impl here,
26 // to check the use of iter_move even if the real concept in
27 // <bits/iterator_concepts.h> no longer uses iter_move.
28 template<class In>
29 concept indirectly_readable_impl
30 = requires(const In in)
31 {
32 typename iter_value_t<In>;
33 typename iter_reference_t<In>;
34 typename iter_rvalue_reference_t<In>;
35 { *in } -> same_as<iter_reference_t<In>>;
36 { ranges::iter_move(in) } -> same_as<iter_rvalue_reference_t<In>>;
37 };
38
39 template<class T> requires indirectly_readable_impl<projected<T*, identity>>
40 void algo(T)
41 { }
42
43 void
44 test01()
45 {
46 // PR libstdc++/92894
47 // Verify that the use of range::iter_move above doesn't cause odr-use of
48 // projected<local-class-type, identity>::operator* (which is not defined).
49 struct X { };
50 X a;
51 algo(a);
52 }