forked from OSchip/llvm-project
81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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), "");
|
|
}
|