c52f43e72d
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111767 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.0 KiB
C++
59 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <functional>
|
|
|
|
// reference_wrapper
|
|
|
|
// reference_wrapper& operator=(const reference_wrapper<T>& x);
|
|
|
|
#include <functional>
|
|
#include <cassert>
|
|
|
|
class functor1
|
|
: public std::unary_function<int, char>
|
|
{
|
|
};
|
|
|
|
template <class T>
|
|
void
|
|
test(T& t)
|
|
{
|
|
std::reference_wrapper<T> r(t);
|
|
T t2 = t;
|
|
std::reference_wrapper<T> r2(t2);
|
|
r2 = r;
|
|
assert(&r2.get() == &t);
|
|
}
|
|
|
|
void f() {}
|
|
void g() {}
|
|
|
|
void
|
|
test_function()
|
|
{
|
|
std::reference_wrapper<void ()> r(f);
|
|
std::reference_wrapper<void ()> r2(g);
|
|
r2 = r;
|
|
assert(&r2.get() == &f);
|
|
}
|
|
|
|
int main()
|
|
{
|
|
void (*fp)() = f;
|
|
test(fp);
|
|
test_function();
|
|
functor1 f1;
|
|
test(f1);
|
|
int i = 0;
|
|
test(i);
|
|
const int j = 0;
|
|
test(j);
|
|
}
|