46 lines
1.4 KiB
C++
46 lines
1.4 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/class_of.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_class_of {
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template<typename>
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static auto test(...) -> std::true_type;
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template<typename A,
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typename std::remove_reference<
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TRAIT(class_of, A)>::type* = 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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auto lambda = [](){};
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CT_ASSERT(is_substitution_failure_class_of<decltype(lambda)>::value);
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CT_ASSERT(is_substitution_failure_class_of<decltype(lambda)&>::value);
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CT_ASSERT(is_substitution_failure_class_of<void>::value);
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CT_ASSERT(is_substitution_failure_class_of<void*>::value);
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CT_ASSERT(is_substitution_failure_class_of<int>::value);
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CT_ASSERT(is_substitution_failure_class_of<int &>::value);
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CT_ASSERT(is_substitution_failure_class_of<int()>::value);
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CT_ASSERT(is_substitution_failure_class_of<int(*)()>::value);
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CT_ASSERT(is_substitution_failure_class_of<int(**)()>::value);
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CT_ASSERT(is_substitution_failure_class_of<int(&)()>::value);
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CT_ASSERT(is_substitution_failure_class_of<int (foo::** const)()>::value);
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}
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