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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/*
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Copyright Barrett Adair 2016
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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 <type_traits>
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#include <functional>
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#include <tuple>
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#include <utility>
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#include <boost/callable_traits.hpp>
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using namespace boost::callable_traits;
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#ifndef CT_ASSERT
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#define CT_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
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#endif //CT_ASSERT
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#ifdef CALLABLE_TRAITS_DISABLE_REFERENCE_QUALIFIERS
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#define LREF
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#define RREF
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#else
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#define LREF &
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#define RREF &&
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#endif
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#define TX_SAFE CALLABLE_TRAITS_TRANSACTION_SAFE_SPECIFIER
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#define VA_CC CALLABLE_TRAITS_DEFAULT_VARARGS_CC
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template<template<class...> class, typename...>
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struct is_substitution_failure;
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template<template<class> class MetaFn, typename T>
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struct is_substitution_failure<MetaFn, T> {
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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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typename std::remove_reference<MetaFn<U>>::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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template<template<class, class> class MetaFn, typename T1, typename T2>
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struct is_substitution_failure<MetaFn, T1, T2> {
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template<typename, typename>
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static auto test(...) -> std::true_type;
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template<typename A, typename B,
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typename std::remove_reference<MetaFn<A, B>>::type* = nullptr>
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static auto test(int) -> std::false_type;
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static constexpr bool value = decltype(test<T1, T2>(0))::value;
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};
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template<template<class, class> class Template, typename T1, typename T2>
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void assert_sfinae() {
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CT_ASSERT(is_substitution_failure<Template, T1, T2>::value);
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}
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template<template<class> class Template, typename T>
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void assert_sfinae() {
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CT_ASSERT(is_substitution_failure<Template, T>::value);
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}
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template<typename T1, typename T2>
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void assert_same() {
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CT_ASSERT(std::is_same<T1, T2>::value);
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}
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