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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>
// In C++17, the function adapters mem_fun/mem_fun_ref, etc have been removed.
// However, for backwards compatibility, if _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
// is defined before including <functional>, then they will be restored.
#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
#include <functional>
#include <cassert>
int identity(int v) { return v; }
int sum(int a, int b) { return a + b; }
struct Foo {
int zero() const { return 0; }
int identity(int v) const { return v; }
int sum(int a, int b) const { return a + b; }
};
int main()
{
typedef std::pointer_to_unary_function<int, int> PUF;
typedef std::pointer_to_binary_function<int, int, int> PBF;
assert((std::ptr_fun<int, int>(identity)(4) == 4));
assert((std::ptr_fun<int, int, int>(sum)(4, 5) == 9));
Foo f;
assert((std::mem_fn(&Foo::identity)(f, 5) == 5));
assert((std::mem_fn(&Foo::sum)(f, 5, 6) == 11));
typedef std::mem_fun_ref_t<int, Foo> MFR;
typedef std::const_mem_fun_ref_t<int, Foo> CMFR;
assert((std::mem_fun_ref(&Foo::zero)(f) == 0));
assert((std::mem_fun_ref(&Foo::identity)(f, 5) == 5));
}
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