1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <functional>
11 
12 // template <class T>
13 // struct hash
14 //     : public unary_function<T, size_t>
15 // {
16 //     size_t operator()(T val) const;
17 // };
18 
19 // Not very portable
20 
21 #include <thread>
22 #include <cassert>
23 
main()24 int main()
25 {
26     std::thread::id id1;
27     std::thread::id id2 = std::this_thread::get_id();
28     typedef std::hash<std::thread::id> H;
29     H h;
30     assert(h(id1) != h(id2));
31 }
32