49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
/*
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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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HEADER GUARDS INTENTIONALLY OMITTED
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*/
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#ifndef PP_CAT
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#define PP_CAT_(x, y) x ## y
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#define PP_CAT(x, y) PP_CAT_(x, y)
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#endif
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template<typename T>
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struct PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST) {
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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(CALLABLE_TRAIT_UNDER_TEST, 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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bool PP_CAT(test_, CALLABLE_TRAIT_UNDER_TEST)() {
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int &>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int(&)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int(*)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int(* const foo::*)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int foo::*>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int (foo::* &)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int (foo::* const)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int (foo::* const &)()>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<int (foo::* volatile)()>::value);
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auto lambda = [](){};
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<decltype(lambda)>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<decltype(lambda)&>::value);
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CT_ASSERT(PP_CAT(is_sub_failure_, CALLABLE_TRAIT_UNDER_TEST)<void>::value);
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return true;
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}
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auto PP_CAT(var_, CALLABLE_TRAIT_UNDER_TEST) = PP_CAT(test_, CALLABLE_TRAIT_UNDER_TEST)();
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