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 // UNSUPPORTED: c++98, c++03, c++11 11 12 // <propagate_const> 13 14 // template <class T> constexpr void swap(propagate_const<T>& x, propagate_const<T>& y); 15 16 #include <experimental/propagate_const> 17 #include "propagate_const_helpers.h" 18 #include <cassert> 19 20 using std::experimental::propagate_const; 21 22 bool swap_called = false; 23 void swap(X &, X &) { swap_called = true; } 24 25 int main() { 26 typedef propagate_const<X> P; 27 P p1(1); 28 P p2(2); 29 swap(p1, p2); 30 assert(swap_called); 31 } 32
