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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/detail/decay.hpp>
#include <type_traits>
namespace hana = boost::hana;
template <typename T, typename Decayed>
void check() {
static_assert(std::is_same<
typename hana::detail::decay<T>::type,
Decayed
>::value, "");
}
int main() {
// void is untouched
check<void, void>();
// normal types lose cv-qualifiers
check<int, int>();
check<int const, int>();
check<int const volatile, int>();
// [cv-qualified] references are stripped
check<int&, int>();
check<int const&, int>();
check<int&&, int>();
check<int const&&, int>();
// pointers are untouched
check<int*, int*>();
check<int const*, int const*>();
check<int volatile*, int volatile*>();
check<int const volatile*, int const volatile*>();
// arrays decay to pointers
check<int[], int*>();
check<int[10], int*>();
check<int const[10], int const*>();
check<int volatile[10], int volatile*>();
check<int const volatile[10], int const volatile*>();
// functions decay to function pointers
check<void(), void(*)()>();
check<void(...), void (*)(...)>();
check<void(int), void(*)(int)>();
check<void(int, ...), void(*)(int, ...)>();
check<void(int, float), void(*)(int, float)>();
check<void(int, float, ...), void(*)(int, float, ...)>();
}
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