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comparison libstdc++-v3/testsuite/24_iterators/back_insert_iterator/constexpr.cc @ 152:2b5abeee2509

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update gcc11
author anatofuz
date Mon, 25 May 2020 07:50:57 +0900
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145:1830386684a0 152:2b5abeee2509
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 struct container
24 {
25 using value_type = int;
26
27 constexpr int* begin() { return std::begin(data); }
28 constexpr int* end() { return next; }
29
30 constexpr void push_back(int val)
31 {
32 if (next == std::end(data))
33 throw val;
34 *next++ = val;
35 }
36
37 int data[3];
38 int* next = std::begin(data);
39 };
40
41 constexpr bool
42 test01()
43 {
44 container c;
45 std::back_insert_iterator<container> iter;
46 iter = std::back_inserter(c);
47 *iter++ = 1;
48 int i = 2;
49 *iter = i;
50 *++iter = 3;
51 return c.data[0] == 1 && c.data[1] == 2 && c.data[2] == 3;
52 }
53
54 static_assert( test01() );