scope/detail/is_not_like.hpp

0001 /*
0002  * Distributed under the Boost Software License, Version 1.0.
0003  * (See accompanying file LICENSE_1_0.txt or copy at
0004  * https://www.boost.org/LICENSE_1_0.txt)
0005  *
0006  * Copyright (c) 2023 Andrey Semashev
0007  */
0008 /*!
0009  * \file scope/detail/is_not_like.hpp
0010  *
0011  * This header contains definition of \c is_not_like type trait.
0012  */
0013
0014 #ifndef BOOST_SCOPE_DETAIL_IS_NOT_LIKE_HPP_INCLUDED_
0015 #define BOOST_SCOPE_DETAIL_IS_NOT_LIKE_HPP_INCLUDED_
0016
0017 #include <type_traits>
0018 #include <boost/scope/detail/config.hpp>
0019 #include <boost/scope/detail/header.hpp>
0020
0021 #ifdef BOOST_HAS_PRAGMA_ONCE
0022 #pragma once
0023 #endif
0024
0025 namespace boost {
0026 namespace scope {
0027 namespace detail {
0028
0029 //! The type trait checks if \c T is not a possibly cv-reference-qualified specialization of \c Template
0030 template< typename T, template< typename... > class Template >
0031 struct is_not_like : public std::true_type { };
0032 template< typename T, template< typename... > class Template >
0033 struct is_not_like< T&, Template > : public is_not_like< T, Template > { };
0034 template< template< typename... > class Template, typename... Ts >
0035 struct is_not_like< Template< Ts... >, Template > : public std::false_type { };
0036 template< template< typename... > class Template, typename... Ts >
0037 struct is_not_like< const Template< Ts... >, Template > : public std::false_type { };
0038 template< template< typename... > class Template, typename... Ts >
0039 struct is_not_like< volatile Template< Ts... >, Template > : public std::false_type { };
0040 template< template< typename... > class Template, typename... Ts >
0041 struct is_not_like< const volatile Template< Ts... >, Template > : public std::false_type { };
0042
0043 } // namespace detail
0044 } // namespace scope
0045 } // namespace boost
0046
0047 #include <boost/scope/detail/footer.hpp>
0048
0049 #endif // BOOST_SCOPE_DETAIL_IS_NOT_LIKE_HPP_INCLUDED_