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 24int 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