1 // { dg-do compile }
2 
3 // Copyright (C) 2007-2021 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library.  This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 //
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 // GNU General Public License for more details.
15 //
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3.  If not see
18 // <http://www.gnu.org/licenses/>.
19 //
20 
21 #include <map>
22 
23 // libstdc++/31440
24 struct DagNode
25 { };
26 
27 class MemoTable
28 {
29 public:
30   void memoRewrite();
31 
32 private:
33   struct dagNodeLt;
34   class MemoMap;
35 
36   MemoMap* memoMap;
37 };
38 
39 struct MemoTable::dagNodeLt
40 {
41   bool operator()(const DagNode*, const DagNode*) const;
42 };
43 
44 class MemoTable::MemoMap
45 : public std::map<DagNode*, DagNode*, MemoTable::dagNodeLt>
46 { };
47 
48 void
memoRewrite()49 MemoTable::memoRewrite()
50 {
51   memoMap->find(0);
52 }
53