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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 <class... ArgTypes>
// requires Callable<T, ArgTypes&&...>
// Callable<T, ArgTypes&&...>::result_type
// operator()(ArgTypes&&... args) const;
#include <functional>
#include <cassert>
// 0 args, return int
int count = 0;
int f_int_0()
{
return 3;
}
struct A_int_0
{
int operator()() {return 4;}
};
void
test_int_0()
{
// function
{
std::reference_wrapper<int ()> r1(f_int_0);
assert(r1() == 3);
}
// function pointer
{
int (*fp)() = f_int_0;
std::reference_wrapper<int (*)()> r1(fp);
assert(r1() == 3);
}
// functor
{
A_int_0 a0;
std::reference_wrapper<A_int_0> r1(a0);
assert(r1() == 4);
}
}
// 1 arg, return void
void f_void_1(int i)
{
count += i;
}
struct A_void_1
{
void operator()(int i)
{
count += i;
}
};
int main()
{
test_int_0();
}
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