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b3faceede2
As explained in issue #1273, `operator&&` and `operator||` should give a proper compile time error on use instead of the compiler complaining about them not being defined. This commit adds an `always_false` type in `catch_meta.hpp` used for implementing a nice `static_assert` for both of the abovementioned operators. Closes #1273
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
/*
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* Created by Jozef on 02/12/2018.
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* Copyright 2018 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef TWOBLUECUBES_CATCH_META_HPP_INCLUDED
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#define TWOBLUECUBES_CATCH_META_HPP_INCLUDED
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#include <type_traits>
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template< typename... >
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struct TypeList{};
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template< typename... >
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struct append;
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template< template<typename...> class L1
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, typename...E1
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, template<typename...> class L2
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, typename...E2
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>
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struct append< L1<E1...>, L2<E2...> >
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{
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using type = L1<E1..., E2...>;
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};
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template< template<typename...> class L1
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, typename...E1
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, template<typename...> class L2
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, typename...E2
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, typename...Rest
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>
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struct append< L1<E1...>, L2<E2...>, Rest...>
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{
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using type = typename append< L1<E1..., E2...>, Rest... >::type;
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};
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template< template<typename...> class
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, typename...
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>
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struct rewrap;
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template< template<typename...> class Container
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, template<typename...> class List
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, typename...elems
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>
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struct rewrap<Container, List<elems...>>
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{
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using type = TypeList< Container< elems... > >;
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};
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template< template<typename...> class Container
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, template<typename...> class List
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, class...Elems
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, typename...Elements>
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struct rewrap<Container, List<Elems...>, Elements...>
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{
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using type = typename append<TypeList<Container<Elems...>>, typename rewrap<Container, Elements...>::type>::type;
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};
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template< template<typename...> class...Containers >
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struct combine
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{
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template< typename...Types >
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struct with_types
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{
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template< template <typename...> class Final >
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struct into
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{
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using type = typename append<Final<>, typename rewrap<Containers, Types...>::type...>::type;
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};
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};
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};
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template<typename T>
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struct always_false : std::false_type {};
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#endif // TWOBLUECUBES_CATCH_META_HPP_INCLUDED
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