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