//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// The test requires access control SFINAE.
// <unordered_map>
// Check that std::unordered_map fails to instantiate if the hash function is
// not copy-constructible. This is mentioned in LWG issue 2436
#include <unordered_map>
template <class T>
struct Hash {
std::size_t operator () (const T& lhs) const { return 0; }
Hash () {}
private:
Hash (const Hash &); // declared but not defined
};
int main(int, char**) {
std::unordered_map<int, int, Hash<int> > m;
return 0;
}