1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <map>
10 
11 // Check that std::map fails to instantiate if the comparison predicate is
12 // not copy-constructible. This is LWG issue 2436
13 
14 #include <map>
15 
16 template <class T>
17 struct Comp {
18     bool operator () (const T& lhs, const T& rhs) const { return lhs < rhs; }
19 
20     Comp () {}
21 private:
22     Comp (const Comp &); // declared but not defined
23     };
24 
25 
26 int main(int, char**) {
27     std::map<int, int, Comp<int> > m;
28 
29   return 0;
30 }
31