enum.fail.cpp (568B)
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 // Hashing a struct w/o a defined hash should fail. 13 14 #include <functional> 15 #include <cassert> 16 #include <type_traits> 17 18 struct X {}; 19 20 int main() 21 { 22 X x; 23 size_t h = std::hash<X>{} ( x ); 24 }