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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
// check for deriving from binary_function
#include <functional>
#include <type_traits>
class functor1
: public std::unary_function<int, char>
{
};
class functor2
: public std::binary_function<char, int, double>
{
};
class functor3
: public std::unary_function<int, int>,
public std::binary_function<char, int, double>
{
public:
typedef float result_type;
};
class functor4
: public std::unary_function<int, int>,
public std::binary_function<char, int, double>
{
public:
};
struct C
{
typedef int argument_type;
typedef int result_type;
};
int main()
{
static_assert((!std::is_base_of<std::binary_function<int, char, int>,
std::reference_wrapper<functor1> >::value), "");
static_assert((std::is_base_of<std::binary_function<char, int, double>,
std::reference_wrapper<functor2> >::value), "");
static_assert((std::is_base_of<std::binary_function<char, int, double>,
std::reference_wrapper<functor3> >::value), "");
static_assert((std::is_base_of<std::binary_function<char, int, double>,
std::reference_wrapper<functor4> >::value), "");
static_assert((!std::is_base_of<std::binary_function<int, int, int>,
std::reference_wrapper<C> >::value), "");
static_assert((!std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float ()> >::value), "");
static_assert((!std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float (int)> >::value), "");
static_assert((std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float (int, int)> >::value), "");
static_assert((!std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float(*)()> >::value), "");
static_assert((!std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float(*)(int)> >::value), "");
static_assert((std::is_base_of<std::binary_function<int, int, float>,
std::reference_wrapper<float(*)(int, int)> >::value), "");
static_assert((!std::is_base_of<std::binary_function<C*, int, float>,
std::reference_wrapper<float(C::*)()> >::value), "");
static_assert((std::is_base_of<std::binary_function<C*, int, float>,
std::reference_wrapper<float(C::*)(int)> >::value), "");
static_assert((std::is_base_of<std::binary_function<const volatile C*, int, float>,
std::reference_wrapper<float(C::*)(int) const volatile> >::value), "");
}
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