//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <typeindex> // struct hash<type_index> // : public unary_function<type_index, size_t> // { // size_t operator()(type_index index) const; // }; #include <typeindex> #include <type_traits> int main() { static_assert((std::is_base_of<std::unary_function<std::type_index, std::size_t>, std::hash<std::type_index> >::value), ""); }