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 // UNSUPPORTED: libcpp-has-no-threads 10 11 // <thread> 12 13 // template <class T> 14 // struct hash 15 // : public unary_function<T, size_t> 16 // { 17 // size_t operator()(T val) const; 18 // }; 19 20 // Not very portable 21 22 #include <thread> 23 #include <cassert> 24 25 #include "test_macros.h" 26 main(int,char **)27int main(int, char**) 28 { 29 std::thread::id id1; 30 std::thread::id id2 = std::this_thread::get_id(); 31 typedef std::hash<std::thread::id> H; 32 static_assert((std::is_same<typename H::argument_type, std::thread::id>::value), "" ); 33 static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" ); 34 ASSERT_NOEXCEPT(H()(id2)); 35 H h; 36 assert(h(id1) != h(id2)); 37 38 return 0; 39 } 40