cxx/test/utilities/function.objects/refwrap/refwrap.helpers/cref_2.pass.cpp

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//===----------------------------------------------------------------------===//
//
// 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>
// reference_wrapper
// template <ObjectType T> reference_wrapper<const T> cref(reference_wrapper<T> t);
#include <functional>
#include <cassert>
int main()
{
const int i = 0;
std::reference_wrapper<const int> r1 = std::cref(i);
std::reference_wrapper<const int> r2 = std::cref(r1);
assert(&r2.get() == &i);
}