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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>
// template<Returnable R, class T, CopyConstructible... Args>
// unspecified mem_fn(R (T::* pm)(Args...));
#include <functional>
#include <cassert>
#include "test_macros.h"
struct A
{
char test0() {return 'a';}
char test1(int) {return 'b';}
char test2(int, double) {return 'c';}
};
template <class F>
void
test0(F f)
{
{
A a;
assert(f(a) == 'a');
A* ap = &a;
assert(f(ap) == 'a');
const F& cf = f;
assert(cf(ap) == 'a');
}
}
template <class F>
void
test1(F f)
{
{
A a;
assert(f(a, 1) == 'b');
A* ap = &a;
assert(f(ap, 2) == 'b');
const F& cf = f;
assert(cf(ap, 2) == 'b');
}
}
template <class F>
void
test2(F f)
{
{
A a;
assert(f(a, 1, 2) == 'c');
A* ap = &a;
assert(f(ap, 2, 3.5) == 'c');
const F& cf = f;
assert(cf(ap, 2, 3.5) == 'c');
}
}
int main()
{
test0(std::mem_fn(&A::test0));
test1(std::mem_fn(&A::test1));
test2(std::mem_fn(&A::test2));
#if TEST_STD_VER >= 11
static_assert((noexcept(std::mem_fn(&A::test0))), ""); // LWG#2489
#endif
}
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