//===----------------------------------------------------------------------===// // // 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. // //===----------------------------------------------------------------------===// // <functional> // class function<R(ArgTypes...)> // function(nullptr_t); #include <functional> #include <cassert> int main() { std::function<int(int)> f(nullptr); assert(!f); }