[ceph.git] / ceph / src / boost / libs / hana / test / functional / apply.cpp

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)

#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/functional/apply.hpp>

#include <laws/base.hpp>
#include <support/tracked.hpp>

#include <type_traits>
#include <utility>
namespace hana = boost::hana;


template <int i = 0>
struct nonpod : Tracked {
    nonpod() : Tracked{i} { }
};

struct NonCopyable {
    NonCopyable() = default;
    NonCopyable(NonCopyable const&) = delete;
    NonCopyable& operator=(NonCopyable const&) = delete;
};

struct TestClass {
    explicit TestClass(int x) : data(x) { }
    TestClass(TestClass const&) = delete;
    TestClass& operator=(TestClass const&) = delete;

    int& operator()(NonCopyable&&) & { return data; }
    int const& operator()(NonCopyable&&) const & { return data; }
    int volatile& operator()(NonCopyable&&) volatile & { return data; }
    int const volatile& operator()(NonCopyable&&) const volatile & { return data; }

    int&& operator()(NonCopyable&&) && { return std::move(data); }
    int const&& operator()(NonCopyable&&) const && { return std::move(data); }
    int volatile&& operator()(NonCopyable&&) volatile && { return std::move(data); }
    int const volatile&& operator()(NonCopyable&&) const volatile && { return std::move(data); }

    int data;
};

struct DerivedFromTestClass : TestClass {
    explicit DerivedFromTestClass(int x) : TestClass(x) { }
};


template <typename Signature,  typename Expect, typename Functor>
void test_b12(Functor&& f) {
    // Create the callable object.
    using ClassFunc = Signature TestClass::*;
    ClassFunc func_ptr = &TestClass::operator();

    // Create the dummy arg.
    NonCopyable arg;

    // Check that the deduced return type of invoke is what is expected.
    using DeducedReturnType = decltype(
        hana::apply(func_ptr, std::forward<Functor>(f), std::move(arg))
    );
    static_assert(std::is_same<DeducedReturnType, Expect>::value, "");

    // Run invoke and check the return value.
    DeducedReturnType ret = hana::apply(func_ptr, std::forward<Functor>(f), std::move(arg));
    BOOST_HANA_RUNTIME_CHECK(ret == 42);
}

template <typename Expect, typename Functor>
void test_b34(Functor&& f) {
    // Create the callable object.
    using ClassFunc = int TestClass::*;
    ClassFunc func_ptr = &TestClass::data;

    // Check that the deduced return type of invoke is what is expected.
    using DeducedReturnType = decltype(
        hana::apply(func_ptr, std::forward<Functor>(f))
    );
    static_assert(std::is_same<DeducedReturnType, Expect>::value, "");

    // Run invoke and check the return value.
    DeducedReturnType ret = hana::apply(func_ptr, std::forward<Functor>(f));
    BOOST_HANA_RUNTIME_CHECK(ret == 42);
}

template <typename Expect, typename Functor>
void test_b5(Functor&& f) {
    NonCopyable arg;

    // Check that the deduced return type of invoke is what is expected.
    using DeducedReturnType = decltype(
        hana::apply(std::forward<Functor>(f), std::move(arg))
    );
    static_assert(std::is_same<DeducedReturnType, Expect>::value, "");

    // Run invoke and check the return value.
    DeducedReturnType ret = hana::apply(std::forward<Functor>(f), std::move(arg));
    BOOST_HANA_RUNTIME_CHECK(ret == 42);
}

int& foo(NonCopyable&&) {
    static int data = 42;
    return data;
}

int main() {
    // Test normal usage with a function object
    {
        hana::test::_injection<0> f{};
        using hana::test::ct_eq;

        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::apply(f),
            f()
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::apply(f, ct_eq<0>{}),
            f(ct_eq<0>{})
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::apply(f, ct_eq<0>{}, ct_eq<1>{}),
            f(ct_eq<0>{}, ct_eq<1>{})
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
            f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
            f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{})
        ));

        // Make sure we can use apply with non-PODs
        hana::apply(f, nonpod<>{});
    }

    // Bullets 1 & 2 in the standard
    {
        TestClass cl(42);
        test_b12<int&(NonCopyable&&) &, int&>(cl);
        test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
        test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
        test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);

        test_b12<int&&(NonCopyable&&) &&, int&&>(std::move(cl));
        test_b12<int const&&(NonCopyable&&) const &&, int const&&>(std::move(cl));
        test_b12<int volatile&&(NonCopyable&&) volatile &&, int volatile&&>(std::move(cl));
        test_b12<int const volatile&&(NonCopyable&&) const volatile &&, int const volatile&&>(std::move(cl));
    }
    {
        DerivedFromTestClass cl(42);
        test_b12<int&(NonCopyable&&) &, int&>(cl);
        test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
        test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
        test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);

        test_b12<int&&(NonCopyable&&) &&, int&&>(std::move(cl));
        test_b12<int const&&(NonCopyable&&) const &&, int const&&>(std::move(cl));
        test_b12<int volatile&&(NonCopyable&&) volatile &&, int volatile&&>(std::move(cl));
        test_b12<int const volatile&&(NonCopyable&&) const volatile &&, int const volatile&&>(std::move(cl));
    }
    {
        TestClass cl_obj(42);
        TestClass *cl = &cl_obj;
        test_b12<int&(NonCopyable&&) &, int&>(cl);
        test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
        test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
        test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
    }
    {
        DerivedFromTestClass cl_obj(42);
        DerivedFromTestClass *cl = &cl_obj;
        test_b12<int&(NonCopyable&&) &, int&>(cl);
        test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
        test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
        test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
    }

    // Bullets 3 & 4 in the standard
    {
        using Fn = TestClass;
        Fn cl(42);
        test_b34<int&>(cl);
        test_b34<int const&>(static_cast<Fn const&>(cl));
        test_b34<int volatile&>(static_cast<Fn volatile&>(cl));
        test_b34<int const volatile&>(static_cast<Fn const volatile &>(cl));

        test_b34<int&&>(static_cast<Fn &&>(cl));
        test_b34<int const&&>(static_cast<Fn const&&>(cl));
        test_b34<int volatile&&>(static_cast<Fn volatile&&>(cl));
        test_b34<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
    }
    {
        using Fn = DerivedFromTestClass;
        Fn cl(42);
        test_b34<int&>(cl);
        test_b34<int const&>(static_cast<Fn const&>(cl));
        test_b34<int volatile&>(static_cast<Fn volatile&>(cl));
        test_b34<int const volatile&>(static_cast<Fn const volatile &>(cl));

        test_b34<int&&>(static_cast<Fn &&>(cl));
        test_b34<int const&&>(static_cast<Fn const&&>(cl));
        test_b34<int volatile&&>(static_cast<Fn volatile&&>(cl));
        test_b34<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
    }
    {
        using Fn = TestClass;
        Fn cl_obj(42);
        Fn* cl = &cl_obj;
        test_b34<int&>(cl);
        test_b34<int const&>(static_cast<Fn const*>(cl));
        test_b34<int volatile&>(static_cast<Fn volatile*>(cl));
        test_b34<int const volatile&>(static_cast<Fn const volatile *>(cl));
    }
    {
        using Fn = DerivedFromTestClass;
        Fn cl_obj(42);
        Fn* cl = &cl_obj;
        test_b34<int&>(cl);
        test_b34<int const&>(static_cast<Fn const*>(cl));
        test_b34<int volatile&>(static_cast<Fn volatile*>(cl));
        test_b34<int const volatile&>(static_cast<Fn const volatile *>(cl));
    }

    // Bullet 5 in the standard
    using FooType = int&(NonCopyable&&);
    {
        FooType& fn = foo;
        test_b5<int &>(fn);
    }
    {
        FooType* fn = foo;
        test_b5<int &>(fn);
    }
    {
        using Fn = TestClass;
        Fn cl(42);
        test_b5<int&>(cl);
        test_b5<int const&>(static_cast<Fn const&>(cl));
        test_b5<int volatile&>(static_cast<Fn volatile&>(cl));
        test_b5<int const volatile&>(static_cast<Fn const volatile &>(cl));

        test_b5<int&&>(static_cast<Fn &&>(cl));
        test_b5<int const&&>(static_cast<Fn const&&>(cl));
        test_b5<int volatile&&>(static_cast<Fn volatile&&>(cl));
        test_b5<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
    }
}
Commit	Line	Data
b32b8144	1	// Copyright Louis Dionne 2013-2017
7c673cae FG	2	// Distributed under the Boost Software License, Version 1.0.
	3	// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
	4
	5	#include <boost/hana/assert.hpp>
	6	#include <boost/hana/equal.hpp>
	7	#include <boost/hana/functional/apply.hpp>
	8
	9	#include <laws/base.hpp>
	10	#include <support/tracked.hpp>
	11
	12	#include <type_traits>
	13	#include <utility>
	14	namespace hana = boost::hana;
	15
	16
	17	template <int i = 0>
	18	struct nonpod : Tracked {
	19	nonpod() : Tracked{i} { }
	20	};
	21
	22	struct NonCopyable {
	23	NonCopyable() = default;
	24	NonCopyable(NonCopyable const&) = delete;
	25	NonCopyable& operator=(NonCopyable const&) = delete;
	26	};
	27
	28	struct TestClass {
	29	explicit TestClass(int x) : data(x) { }
	30	TestClass(TestClass const&) = delete;
	31	TestClass& operator=(TestClass const&) = delete;
	32
	33	int& operator()(NonCopyable&&) & { return data; }
	34	int const& operator()(NonCopyable&&) const & { return data; }
	35	int volatile& operator()(NonCopyable&&) volatile & { return data; }
	36	int const volatile& operator()(NonCopyable&&) const volatile & { return data; }
	37
	38	int&& operator()(NonCopyable&&) && { return std::move(data); }
	39	int const&& operator()(NonCopyable&&) const && { return std::move(data); }
	40	int volatile&& operator()(NonCopyable&&) volatile && { return std::move(data); }
	41	int const volatile&& operator()(NonCopyable&&) const volatile && { return std::move(data); }
	42
	43	int data;
	44	};
	45
	46	struct DerivedFromTestClass : TestClass {
	47	explicit DerivedFromTestClass(int x) : TestClass(x) { }
	48	};
	49
	50
	51	template <typename Signature, typename Expect, typename Functor>
	52	void test_b12(Functor&& f) {
	53	// Create the callable object.
	54	using ClassFunc = Signature TestClass::*;
	55	ClassFunc func_ptr = &TestClass::operator();
	56
	57	// Create the dummy arg.
	58	NonCopyable arg;
	59
	60	// Check that the deduced return type of invoke is what is expected.
	61	using DeducedReturnType = decltype(
	62	hana::apply(func_ptr, std::forward<Functor>(f), std::move(arg))
	63	);
	64	static_assert(std::is_same<DeducedReturnType, Expect>::value, "");
	65
7c673cae FG	66	// Run invoke and check the return value.
	67	DeducedReturnType ret = hana::apply(func_ptr, std::forward<Functor>(f), std::move(arg));
	68	BOOST_HANA_RUNTIME_CHECK(ret == 42);
	69	}
	70
	71	template <typename Expect, typename Functor>
	72	void test_b34(Functor&& f) {
	73	// Create the callable object.
	74	using ClassFunc = int TestClass::*;
	75	ClassFunc func_ptr = &TestClass::data;
	76
	77	// Check that the deduced return type of invoke is what is expected.
	78	using DeducedReturnType = decltype(
	79	hana::apply(func_ptr, std::forward<Functor>(f))
	80	);
	81	static_assert(std::is_same<DeducedReturnType, Expect>::value, "");
	82
7c673cae FG	83	// Run invoke and check the return value.
	84	DeducedReturnType ret = hana::apply(func_ptr, std::forward<Functor>(f));
	85	BOOST_HANA_RUNTIME_CHECK(ret == 42);
	86	}
	87
	88	template <typename Expect, typename Functor>
	89	void test_b5(Functor&& f) {
	90	NonCopyable arg;
	91
	92	// Check that the deduced return type of invoke is what is expected.
	93	using DeducedReturnType = decltype(
	94	hana::apply(std::forward<Functor>(f), std::move(arg))
	95	);
	96	static_assert(std::is_same<DeducedReturnType, Expect>::value, "");
	97
7c673cae FG	98	// Run invoke and check the return value.
	99	DeducedReturnType ret = hana::apply(std::forward<Functor>(f), std::move(arg));
	100	BOOST_HANA_RUNTIME_CHECK(ret == 42);
	101	}
	102
	103	int& foo(NonCopyable&&) {
	104	static int data = 42;
	105	return data;
	106	}
	107
	108	int main() {
	109	// Test normal usage with a function object
	110	{
	111	hana::test::_injection<0> f{};
	112	using hana::test::ct_eq;
	113
	114	BOOST_HANA_CONSTANT_CHECK(hana::equal(
	115	hana::apply(f),
	116	f()
	117	));
	118	BOOST_HANA_CONSTANT_CHECK(hana::equal(
	119	hana::apply(f, ct_eq<0>{}),
	120	f(ct_eq<0>{})
	121	));
	122	BOOST_HANA_CONSTANT_CHECK(hana::equal(
	123	hana::apply(f, ct_eq<0>{}, ct_eq<1>{}),
	124	f(ct_eq<0>{}, ct_eq<1>{})
	125	));
	126	BOOST_HANA_CONSTANT_CHECK(hana::equal(
	127	hana::apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
	128	f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
	129	));
	130	BOOST_HANA_CONSTANT_CHECK(hana::equal(
	131	hana::apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
	132	f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{})
	133	));
	134
	135	// Make sure we can use apply with non-PODs
	136	hana::apply(f, nonpod<>{});
	137	}
	138
	139	// Bullets 1 & 2 in the standard
	140	{
	141	TestClass cl(42);
	142	test_b12<int&(NonCopyable&&) &, int&>(cl);
	143	test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
	144	test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
	145	test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
	146
	147	test_b12<int&&(NonCopyable&&) &&, int&&>(std::move(cl));
	148	test_b12<int const&&(NonCopyable&&) const &&, int const&&>(std::move(cl));
	149	test_b12<int volatile&&(NonCopyable&&) volatile &&, int volatile&&>(std::move(cl));
	150	test_b12<int const volatile&&(NonCopyable&&) const volatile &&, int const volatile&&>(std::move(cl));
	151	}
	152	{
	153	DerivedFromTestClass cl(42);
	154	test_b12<int&(NonCopyable&&) &, int&>(cl);
	155	test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
	156	test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
	157	test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
	158
	159	test_b12<int&&(NonCopyable&&) &&, int&&>(std::move(cl));
	160	test_b12<int const&&(NonCopyable&&) const &&, int const&&>(std::move(cl));
	161	test_b12<int volatile&&(NonCopyable&&) volatile &&, int volatile&&>(std::move(cl));
162	test_b12<int const volatile&&(NonCopyable&&) const volatile &&, int const volatile&&>(std::move(cl));
163	}
164	{
165	TestClass cl_obj(42);
166	TestClass *cl = &cl_obj;
167	test_b12<int&(NonCopyable&&) &, int&>(cl);
168	test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
169	test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
170	test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
171	}
172	{
173	DerivedFromTestClass cl_obj(42);
174	DerivedFromTestClass *cl = &cl_obj;
175	test_b12<int&(NonCopyable&&) &, int&>(cl);
176	test_b12<int const&(NonCopyable&&) const &, int const&>(cl);
177	test_b12<int volatile&(NonCopyable&&) volatile &, int volatile&>(cl);
178	test_b12<int const volatile&(NonCopyable&&) const volatile &, int const volatile&>(cl);
179	}
180
181	// Bullets 3 & 4 in the standard
182	{
183	using Fn = TestClass;
184	Fn cl(42);
185	test_b34<int&>(cl);
186	test_b34<int const&>(static_cast<Fn const&>(cl));
187	test_b34<int volatile&>(static_cast<Fn volatile&>(cl));
188	test_b34<int const volatile&>(static_cast<Fn const volatile &>(cl));
189
190	test_b34<int&&>(static_cast<Fn &&>(cl));
191	test_b34<int const&&>(static_cast<Fn const&&>(cl));
192	test_b34<int volatile&&>(static_cast<Fn volatile&&>(cl));
193	test_b34<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
194	}
195	{
196	using Fn = DerivedFromTestClass;
197	Fn cl(42);
198	test_b34<int&>(cl);
199	test_b34<int const&>(static_cast<Fn const&>(cl));
200	test_b34<int volatile&>(static_cast<Fn volatile&>(cl));
201	test_b34<int const volatile&>(static_cast<Fn const volatile &>(cl));
202
203	test_b34<int&&>(static_cast<Fn &&>(cl));
204	test_b34<int const&&>(static_cast<Fn const&&>(cl));
205	test_b34<int volatile&&>(static_cast<Fn volatile&&>(cl));
206	test_b34<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
207	}
208	{
209	using Fn = TestClass;
210	Fn cl_obj(42);
211	Fn* cl = &cl_obj;
212	test_b34<int&>(cl);
213	test_b34<int const&>(static_cast<Fn const*>(cl));
214	test_b34<int volatile&>(static_cast<Fn volatile*>(cl));
215	test_b34<int const volatile&>(static_cast<Fn const volatile *>(cl));
216	}
217	{
218	using Fn = DerivedFromTestClass;
219	Fn cl_obj(42);
220	Fn* cl = &cl_obj;
221	test_b34<int&>(cl);
222	test_b34<int const&>(static_cast<Fn const*>(cl));
223	test_b34<int volatile&>(static_cast<Fn volatile*>(cl));
224	test_b34<int const volatile&>(static_cast<Fn const volatile *>(cl));
225	}
226
227	// Bullet 5 in the standard
228	using FooType = int&(NonCopyable&&);
229	{
230	FooType& fn = foo;
231	test_b5<int &>(fn);
232	}
233	{
234	FooType* fn = foo;
235	test_b5<int &>(fn);
236	}
237	{
238	using Fn = TestClass;
239	Fn cl(42);
240	test_b5<int&>(cl);
241	test_b5<int const&>(static_cast<Fn const&>(cl));
242	test_b5<int volatile&>(static_cast<Fn volatile&>(cl));
243	test_b5<int const volatile&>(static_cast<Fn const volatile &>(cl));
244
245	test_b5<int&&>(static_cast<Fn &&>(cl));
246	test_b5<int const&&>(static_cast<Fn const&&>(cl));
247	test_b5<int volatile&&>(static_cast<Fn volatile&&>(cl));
248	test_b5<int const volatile&&>(static_cast<Fn const volatile&&>(cl));
249	}
250	}