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// 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, "");
// Check that result_of_t matches Expect.
using ResultOfReturnType = typename std::result_of<ClassFunc&&(Functor&&, NonCopyable&&)>::type;
static_assert(std::is_same<ResultOfReturnType, 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, "");
// Check that result_of_t matches Expect.
using ResultOfReturnType = typename std::result_of<ClassFunc&&(Functor&&)>::type;
static_assert(std::is_same<ResultOfReturnType, 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, "");
// Check that result_of_t matches Expect.
using ResultOfReturnType = typename std::result_of<Functor&&(NonCopyable&&)>::type;
static_assert(std::is_same<ResultOfReturnType, 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));
}
}
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