47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
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/*
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Copyright Barrett Adair 2016-2017
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http ://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/callable_traits/args.hpp>
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#include "test.hpp"
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struct foo;
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template<typename T>
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struct is_substitution_failure_args {
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template<typename>
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static auto test(...) -> std::true_type;
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template<typename U,
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TRAIT(boost::callable_traits::args, U, std::tuple)* = nullptr>
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static auto test(int) -> std::false_type;
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static constexpr bool value = decltype(test<T>(0))::value;
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};
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int main() {
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CT_ASSERT(is_substitution_failure_args<int>::value);
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CT_ASSERT(is_substitution_failure_args<int &>::value);
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CT_ASSERT(is_substitution_failure_args<int (** const &)()>::value);
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CT_ASSERT(is_substitution_failure_args<int (foo::** &)()>::value);
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CT_ASSERT(is_substitution_failure_args<int (foo::** const)()>::value);
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CT_ASSERT(is_substitution_failure_args<int (foo::** const &)()>::value);
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CT_ASSERT(is_substitution_failure_args<int (foo::** volatile)()>::value);
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CT_ASSERT(!is_substitution_failure_args<int (* const &)()>::value);
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CT_ASSERT(!is_substitution_failure_args<int (foo::* &)()>::value);
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CT_ASSERT(!is_substitution_failure_args<int (foo::* const)()>::value);
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CT_ASSERT(!is_substitution_failure_args<int (foo::* const &)()>::value);
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CT_ASSERT(!is_substitution_failure_args<int (foo::* volatile)()>::value);
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auto lambda = [](){};
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CT_ASSERT(!is_substitution_failure_args<decltype(lambda)&>::value);
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CT_ASSERT(is_substitution_failure_args<void>::value);
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}
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