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/*=============================================================================
Copyright (c) 2017 Paul Fultz II
unpack.cpp
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#include <boost/hof/unpack.hpp>
#include <boost/hof/static.hpp>
#include <boost/hof/lambda.hpp>
#include "test.hpp"
#include <memory>
static constexpr boost::hof::static_<boost::hof::unpack_adaptor<unary_class> > unary_unpack = {};
static constexpr boost::hof::static_<boost::hof::unpack_adaptor<binary_class> > binary_unpack = {};
BOOST_HOF_STATIC_AUTO unary_unpack_constexpr = boost::hof::unpack_adaptor<unary_class>();
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_AUTO binary_unpack_constexpr = boost::hof::unpack_adaptor<binary_class>();
#endif
BOOST_HOF_STATIC_AUTO unary_unpack_reveal = boost::hof::reveal_adaptor<boost::hof::unpack_adaptor<unary_class>>();
BOOST_HOF_STATIC_AUTO binary_unpack_reveal = boost::hof::reveal_adaptor<boost::hof::unpack_adaptor<binary_class>>();
#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
BOOST_HOF_TEST_CASE()
{
static_assert(noexcept(boost::hof::unpack(unary_class())(boost::hof::pack(3))), "noexcept unpack");
static_assert(noexcept(unary_unpack(boost::hof::pack(3))), "noexcept unpack");
static_assert(noexcept(binary_unpack(boost::hof::pack(3), boost::hof::pack(2))), "noexcept unpack");
}
#endif
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(unary_class())(std::make_tuple(3)));
BOOST_HOF_TEST_CHECK(3 == unary_unpack(std::make_tuple(3)));
BOOST_HOF_TEST_CHECK(3 == unary_unpack_reveal(std::make_tuple(3)));
int ifu = 3;
BOOST_HOF_TEST_CHECK(3 == unary_unpack(std::tuple<int&>(ifu)));
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(unary_class())(std::make_tuple(3)));
BOOST_HOF_STATIC_TEST_CHECK(3 == unary_unpack_constexpr(std::make_tuple(3)));
BOOST_HOF_STATIC_TEST_CHECK(3 == unary_unpack_reveal(std::make_tuple(3)));
#endif
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(unary_class())(boost::hof::pack(3)));
BOOST_HOF_TEST_CHECK(3 == unary_unpack(boost::hof::pack(3)));
BOOST_HOF_TEST_CHECK(3 == unary_unpack_reveal(boost::hof::pack(3)));
int ifu = 3;
BOOST_HOF_TEST_CHECK(3 == unary_unpack(boost::hof::pack_forward(ifu)));
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(unary_class())(boost::hof::pack(3)));
BOOST_HOF_STATIC_TEST_CHECK(3 == unary_unpack_constexpr(boost::hof::pack(3)));
BOOST_HOF_STATIC_TEST_CHECK(3 == unary_unpack_reveal(boost::hof::pack(3)));
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1, 2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack(std::make_tuple(1, 2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1, 2)));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
BOOST_HOF_TEST_CHECK(3 == binary_unpack(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
BOOST_HOF_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1, 2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_constexpr(std::make_tuple(1, 2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1, 2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_constexpr(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_constexpr(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_constexpr(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(), std::make_tuple(1), std::make_tuple(), std::make_tuple(2)));
BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::unpack(binary_class())(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_constexpr(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
BOOST_HOF_STATIC_TEST_CHECK(3 == binary_unpack_reveal(std::make_tuple(1), std::make_tuple(), std::make_tuple(2), std::make_tuple()));
#endif
}
BOOST_HOF_TEST_CASE()
{
auto p1 = boost::hof::pack_basic(1, 2);
static_assert(boost::hof::is_unpackable<decltype(p1)>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<decltype((p1))>::value, "Not unpackable");
auto p2 = boost::hof::pack_forward(1, 2);
static_assert(boost::hof::is_unpackable<decltype(p2)>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<decltype((p2))>::value, "Not unpackable");
auto p3 = boost::hof::pack(1, 2);
static_assert(boost::hof::is_unpackable<decltype(p3)>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<decltype((p3))>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<std::tuple<int>>::value, "Not unpackable");
static_assert(!boost::hof::is_unpackable<int>::value, "Unpackable");
static_assert(!boost::hof::is_unpackable<void>::value, "Unpackable");
}
BOOST_HOF_TEST_CASE()
{
typedef std::tuple<int, int> tuple_type;
static_assert(boost::hof::is_unpackable<tuple_type>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<tuple_type&>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<const tuple_type&>::value, "Not unpackable");
static_assert(boost::hof::is_unpackable<tuple_type&&>::value, "Not unpackable");
}
BOOST_HOF_STATIC_AUTO lambda_unary_unpack = boost::hof::unpack(BOOST_HOF_STATIC_LAMBDA(int x)
{
return x;
});
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == lambda_unary_unpack(std::make_tuple(3)));
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == lambda_unary_unpack(boost::hof::pack(3)));
}
struct unary_move
{
std::unique_ptr<int> i;
unary_move()
: i(new int(2))
{}
template<class T>
T operator()(T x) const
{
return x + *i;
}
};
static constexpr boost::hof::static_<boost::hof::unpack_adaptor<unary_move> > unary_move_unpack = {};
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(unary_move())(std::make_tuple(1)));
BOOST_HOF_TEST_CHECK(3 == unary_move_unpack(std::make_tuple(1)));
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(unary_move())(boost::hof::pack(1)));
BOOST_HOF_TEST_CHECK(3 == unary_move_unpack(boost::hof::pack(1)));
}
struct indirect_sum_f
{
template<class T, class U>
auto operator()(T x, U y) const
BOOST_HOF_RETURNS(*x + *y);
};
#define MAKE_UNIQUE_PTR(x) std::unique_ptr<int>(new int(x))
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(indirect_sum_f())(boost::hof::pack_basic(MAKE_UNIQUE_PTR(1), MAKE_UNIQUE_PTR(2))));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(indirect_sum_f())(boost::hof::pack_forward(MAKE_UNIQUE_PTR(1), MAKE_UNIQUE_PTR(2))));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(indirect_sum_f())(boost::hof::pack(MAKE_UNIQUE_PTR(1), MAKE_UNIQUE_PTR(2))));
BOOST_HOF_TEST_CHECK(3 == boost::hof::unpack(indirect_sum_f())(std::make_tuple(MAKE_UNIQUE_PTR(1), MAKE_UNIQUE_PTR(2))));
}
template<class...>
struct deduce_types
{};
struct deducer
{
template<class... Ts>
deduce_types<Ts...> operator()(Ts&&...) const;
};
static constexpr boost::hof::unpack_adaptor<deducer> deduce = {};
BOOST_HOF_TEST_CASE()
{
STATIC_ASSERT_SAME(deduce_types<int, int>, decltype(deduce(std::make_tuple(1, 2))));
STATIC_ASSERT_SAME(deduce_types<int, int>, decltype(deduce(std::make_tuple(1), std::make_tuple(2))));
STATIC_ASSERT_SAME(deduce_types<int, int, int>, decltype(deduce(std::make_tuple(1), std::make_tuple(2), std::make_tuple(3))));
STATIC_ASSERT_SAME(std::tuple<int&&, int&&>, decltype(std::forward_as_tuple(1, 2)));
// Disable this test, it seems that rvalue references get swalllowed by type deduction
// STATIC_ASSERT_SAME(deduce_types<int&&, int&&>, decltype(deduce(std::forward_as_tuple(1, 2))));
STATIC_ASSERT_SAME(deduce_types<int, int>, decltype(deduce(boost::hof::pack_basic(1, 2))));
STATIC_ASSERT_SAME(deduce_types<int, int>, decltype(deduce(boost::hof::pack_basic(1), boost::hof::pack_basic(2))));
STATIC_ASSERT_SAME(deduce_types<int, int, int>, decltype(deduce(boost::hof::pack_basic(1), boost::hof::pack_basic(2), boost::hof::pack_basic(3))));
// STATIC_ASSERT_SAME(deduce_types<int&&, int&&>, decltype(deduce(boost::hof::pack_forward(1, 2))));
}
struct not_unpackable
{};
BOOST_HOF_TEST_CASE()
{
auto f = boost::hof::unpack(boost::hof::always(1));
static_assert(!boost::hof::is_invocable<decltype(f), not_unpackable>::value, "SFINAE for unpack failed");
}
struct simple_unpackable
{};
namespace boost { namespace hof {
template<>
struct unpack_sequence<simple_unpackable>
{
template<class F, class S>
constexpr static auto apply(F&& f, S&&) BOOST_HOF_RETURNS
(
f(1)
);
};
}} // namespace boost::hof
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::unpack(boost::hof::identity)(simple_unpackable{}) == 1);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::unpack(boost::hof::identity)(simple_unpackable{}) == 1);
}
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