| 1 | |
|---|---|
| 2 | /* |
| 3 | Copyright Barrett Adair 2016-2017 |
| 4 | |
| 5 | Distributed under the Boost Software License, Version 1.0. |
| 6 | (See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt) |
| 7 | |
| 8 | */ |
| 9 | |
| 10 | #include <boost/callable_traits/args.hpp> |
| 11 | #include "test.hpp" |
| 12 | |
| 13 | struct foo; |
| 14 | |
| 15 | template<typename T> |
| 16 | struct is_substitution_failure_args { |
| 17 | |
| 18 | template<typename> |
| 19 | static auto test(...) -> std::true_type; |
| 20 | |
| 21 | template<typename U, |
| 22 | TRAIT(boost::callable_traits::args, U, std::tuple)* = nullptr> |
| 23 | static auto test(int) -> std::false_type; |
| 24 | |
| 25 | static constexpr bool value = decltype(test<T>(0))::value; |
| 26 | }; |
| 27 | |
| 28 | int main() { |
| 29 | |
| 30 | CT_ASSERT(is_substitution_failure_args<int>::value); |
| 31 | CT_ASSERT(is_substitution_failure_args<int &>::value); |
| 32 | CT_ASSERT(is_substitution_failure_args<int (** const &)()>::value); |
| 33 | CT_ASSERT(is_substitution_failure_args<int (foo::** &)()>::value); |
| 34 | CT_ASSERT(is_substitution_failure_args<int (foo::** const)()>::value); |
| 35 | CT_ASSERT(is_substitution_failure_args<int (foo::** const &)()>::value); |
| 36 | CT_ASSERT(is_substitution_failure_args<int (foo::** volatile)()>::value); |
| 37 | CT_ASSERT(!is_substitution_failure_args<int (* const &)()>::value); |
| 38 | CT_ASSERT(!is_substitution_failure_args<int (foo::* &)()>::value); |
| 39 | CT_ASSERT(!is_substitution_failure_args<int (foo::* const)()>::value); |
| 40 | CT_ASSERT(!is_substitution_failure_args<int (foo::* const &)()>::value); |
| 41 | CT_ASSERT(!is_substitution_failure_args<int (foo::* volatile)()>::value); |
| 42 | auto lambda = [](){}; |
| 43 | CT_ASSERT(!is_substitution_failure_args<decltype(lambda)&>::value); |
| 44 | CT_ASSERT(is_substitution_failure_args<void>::value); |
| 45 | } |
| 46 | |
| 47 |